Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
A Review on the Thermodynamic Aspects of Thermoplastic Foams
1
20
FA
Mozaffar
Mokhtari
Department of Chemical Engineering, Tarbiat Modares University, Tehran, I.R. IRAN
mozaffar.mokhtari@modares.ac.ir
Mohammad Hossein
Navid Famili
Department of Chemical Engineering, Tarbiat Modares University, Tehran, I.R. IRAN
nfamili@modares.ac.ir
<em>Both physical and chemical foaming agents can be used in the two common methods for the production of polymeric foams. The physical foaming agent is dissolved in the polymer </em><em>at a pressure and temperature beyond its critical condition. The foam structure is formed by a sudden</em><em> pressure drop in the mixture in three steps; nucleation, growth, and coalescence. In the nucleation step, thermodynamic instability is formed in the mixture. This induces a tendency in the solvent molecules for a phase transition from a supersaturated state to a gas state in the direction of instability reduction. By overcoming the energy barrier, the free energy of the system is reduced and gas stable nuclei are formed in the free volumes of the polymer chains. Growth and coalescence of the nucleic take place with the diffusion of the gas molecules inside them.</em><em> The growth step is finally stopped and the foam structure is established. With the increase in the nucleation</em><em> efficiency, the growth rate is reduced. Therefore, prediction of nucleation rate is an important factor for controlling the thermoplastic foam structures. Investigation of the nucleation step has been doable with the aid of nucleation theories. The classical nucleation theory is a prominent method for the investigation of nucleation phenomena in thermoplastic foams, but due to the existing of a divergence between its theoretical values with the experimental data, some modifications have been introduced into this theory. Other competing theories such as the Density Functional </em><em>Theory and the Self Consistent Field Theory have also been developed. The main aim of this review paper</em><em> is an investigation of the existing theories for thermoplastic foams.</em>
thermoplastic foam,Nucleation,classical nucleation theory,first order phase transition,Cell density
https://www.nsmsi.ir/article_25909.html
https://www.nsmsi.ir/article_25909_2ae5024a9f29ea7be48641e3b2432552.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Effect of Novel Ether and Conventional Silane External Donors on the 4th Generation of Ziegler-Natta Catalysts for Propylene Polymerization
21
39
FA
Roya
Zahedi
Department of Chemistry, Amirkabir University of Technology, P.O. Box 15875-4413 Tehran, I.R. IRAN
zahedi.r@aut.ac.ir
Faramarz
Afshar Taremi
Polymer Department, AmirKabir University, Tehran, Iran
afshar@aut.ac.ir
Roghayeh
Jamjah
Iran Polymer and Petrochemical Institute (IPPI), P.O. Box: 14977-13115, Tehran, I.R. IRAN
r.jamjah@ippi.ac.ir
<em>In this research, five etheric compounds with different numbers of methoxy groups were synthesized by Williamson reaction. These ether compounds were characterized by <sup>1</sup>HNMR, </em><em><sup>13</sup></em><em>CNMR, and FTIR techniques and then were employed as external electron donors for the polymerization</em><em> of propylene with Ziegler-Natta catalyst for comparison with cyclohexylmethyldimethoxysilane (C-Donor) and dicyclopentyldimethoxy silan (D-Donor). Polymerization of propylene was carried out using MgCl<sub>2</sub>-supported Ziegler–Natta catalyst (MgCl<sub>2</sub>/ID/TiCl<sub>4</sub>) containing a phthalate type internal electron donor in the presence of trimethylaluminum cocatalyst and hydrogen with external donors, to compare the influence of ether and silane compounds in properties of polypropylene. The role of these etheric compounds and industrial alkoxysilanes on the properties of polypropylene were studied by using O-xylene solubility method, Melt Flow Index (MFI) and Differential Scanning Calorimetry (DSC). The productivity, crystallinity, and isotacticity of the obtained polypropylene were influenced by external electron donors. Also, the morphology of the industrial Ziegler-Natta catalyst and polypropylenes produced using these catalysts in the presence of different external donors were determined by Scanning Electron Microscope (SEM).</em>
Polypropylene,Ziegler-Natta catalysts,External electron donors,Williamson reaction
https://www.nsmsi.ir/article_31793.html
https://www.nsmsi.ir/article_31793_28780ec7607e8c4d6d96ebe56d263987.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Peripherally Tetra-1,2,4-triazine Substituted New Metallophthalocyanine Dyes
41
48
FA
Ali Reza
Karimi
Department of Chemistry, Faculty of Science, Arak University, Arak, I.R. IRAN
a-karimi@araku.ac.ir
Marzie
Karimi
Department of Chemistry, Faculty of Science, Arak University, Arak, I.R. IRAN
karimi.m.59@gmail.com
The new metallophthalocyanines bearing 1,2,4-triazine moieties at peripheral positions have been successfully synthesized. They were prepared by cyclotetramerization of corresponding phthalonitriles with anhydrous metal salts [Zn(CH3COO)2, NiCl2 and CuCl2] in the presence of a catalytic amount of DBU in 2-(dimethylamino)ethanol under reflux conditions. These complexes have been characterized by UV-vis, FT-IR, 1H NMR, MALDI-TOF mass spectroscopic, and thermogravimetric analysis. The aggregation behavior of complexes was investigated at different solvents (DMSO, DMF, CHCl3, THF). Phthalocyanine I (tetrakis-[4-(5,6-diphenyl-1,2,4-triazin-3-yl)phenoxy]-phthalocyaninato zinc (II)) shows monomeric behavior in solution. On the other hand, temperature effect on Q band absorbance of I in DMF (c= 5× 10-5 M) at 25, 50, and 80 °C was investigated.
Soluble metallophthalocyanine,1,2,4-Triazines,Aggregation,Phthalonitriles
https://www.nsmsi.ir/article_26363.html
https://www.nsmsi.ir/article_26363_a111a2e6f4fa8ea3c027558471575dd4.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Synthesis, Spectroscopic Characterization, Structural Study and Hirshfeld Surface Analysis of a New Thiophosphoramide with a P(S)(N)3 Skeleton
49
59
FA
Elham
Torabi Farkhani
Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN
torabielham2010@gmail.com
Mehrdad
Pourayoubi
Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN
pourayoubi@um.ac.ir
Pavel
V. Andreev
Department of Physics, Lobachevsky State University of Nizhni Novgorod, Gagarin Avenue, 23, Nizhni Novgorod, RUSSIAN FEDERATION
andreev@phys.unn.ru
Ekaterina
S. Schegravina
Department of Chemistry, Lobachevsky State University of Nizhni Novgorod, Gagarin Avenue, 23, Nizhni Novgorod, RUSSIAN FEDERATION
sc.katarina@yandex.ru
<em>Hirshfeld surfaces and two-dimensional fingerprint plots are used to analysis intermolecular contacts. In this research, synthesis, crystal structure, and intermolecular </em><em>interactions are investigated for a new compound, {[(cyclo-C<sub>6</sub>H<sub>11</sub>)N(CH<sub>3</sub>)]P(S)[NC<sub>4</sub>H<sub>8</sub>O]<sub>2</sub>}<sub>2</sub>.CH<sub>3</sub>OH.</em><em>The asymmetric unit of this compound is composed of two independent phosphorothioic triamide molecules and one molecule of methanol solvent. The phosphorus atom displays a distorted tetrahedral environment with the maximum and minimum values of angles at the P atom for one of the N—P═S and one of the N—P—N angles, respectively. From the six nitrogen atoms for two phosphorothioic triamide molecules, </em><em>the environments at the four nitrogen atoms are mainly non-planar, while the two other nitrogen atoms show</em><em> almost planarity. Hirshfeld surfaces and two-dimensional fingerprint plots are generated using the Crystal Explorer software program in which the CIF input file is used. These analyses reveal that H…H interactions have 78.3% and 77.7% portions of total interactions for the two symmetry-independent phosphorothioic triamide molecules, respectively. The C—H…O interaction in one of the symmetry independent molecules and the C—H…S═P interaction in the other molecule are the characteristic interactions, appearing as very large red spots in the related Hirshfeld surface maps. The characterization of the compound has also been performed by IR, <sup>31</sup>P{<sup>1</sup>H}, <sup>1</sup>H and <sup>13</sup>C NMR and mass spectroscopy.</em>
Thiophosphoramide,Hirshfeld surface,Crystal structure,NMR
https://www.nsmsi.ir/article_26003.html
https://www.nsmsi.ir/article_26003_0e3a35dc39ae8d651670b4a1977e9147.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Novel Procedure for Synthesis of SAPO-34 Nano Crystals Using Aluminum Chloride as Aluminum Source and Investigation of the Influence of Different Parameters on their Synthesis
61
72
FA
Mohammad
Ghadiri
Chemical Engineering Department, Urmia University of Technology, Urmia, I.R. IRAN
m.ghadiri@uut.ac.ir
Khadijeh
Mirza
Chemical Engineering Department, Urmia University of Technology, Urmia, I.R. IRAN
mirza.khadijeh@yahoo.com
Mohammad
Haghighi
Reactor and Catalysis Research Center (RCRC), Chemical Engineering Department, Sahand University of Technology, P.O.Box 51335-1996 Sahand New Town, Tabriz, I.R. IRAN
haghighi@sut.ac.ir
<em>Silicoaluminophosphate (SAPO-34) molecular sieve was successfully synthesized via hydrothermal procedure using aluminum chloride as the source of aluminum and diethylamine (DEA) as a template. The influence of template amount (effect on pH of precursor gel) and crystallization temperature and time on the synthesis of chabazite structure related to SAPO-34 were investigated. </em><em>The samples were characterized by XRD, FT-IR, FESEM and TEM techniques. According to the XRD</em><em> analysis, it was found that by decreasing the pH and crystallization temperature the probability of chabazite phase production is reduced. The analysis of the XRD reflections by Scherrer´s equation provides the particle size of 36-44 nm for SAPO-34 catalysts. Also, crystallinity, crystallite size, and purity of samples were compared together. We also found that the crystallite size increases </em><em>with increasing of pH and in crystallization time of 26 h. Also, it was found that the synthesis conditions</em><em> greatly affected the morphology of SAPO-34 catalysts. The FESEM analysis confirmed SAPO-34 samples synthesized in the presence of a larger amount of template were in spherical morphology.</em><em> </em>
SAPO-34 Nanocrystal,Hydrothermal,pH,Crystallization time,Temperature,Aluminum chloride
https://www.nsmsi.ir/article_25237.html
https://www.nsmsi.ir/article_25237_fb35b4954130e289249e387c54c51813.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Preparation of Functionalized Metal Oxide Nanoparticle with Super Hydrophobic Properties by Modify the Surface Chemistry with N-(3-triethoxy-silyl-propyl) Oleamide (N-TESPO)
73
82
FA
Ali
Rostami
Catalyst Research Center, Chemical Engineering. Department, Razi University, Kermanshah, I.R. IRAN
alirostami1369@gmail.com
Shahram
Sharifnia
Catalyst Research Center, Chemical Engineering. Department, Razi University, Kermanshah, I.R. IRAN
sharif@razi.ac.ir
Golshan
Moradi
Catalyst Research Center, Chemical Engineering. Department, Razi University, Kermanshah, I.R. IRAN
gls.moradi@gmail.com
<em>In this study, in order to surface modification of zinc oxide, titanium dioxide and boehmite nanoparticles the new organic compound was introduced. Creating new functional groups with oleic acid did not represent the satisfactory results, so in this work, the oleic acid was turned to the much more active compound, and then on the surface of the mentioned nanoparticles was assembled. The novel reagent named N-(3-triethoxysilylpropyl) oleamide (N-TESPO) was synthesized through chemical modification of oleic acid which easily capable of functionalizing a variety of oxide nanoparticles to superhydrophobic nanoparticles. This reagent was synthesized</em><em>in a two-stage reaction of oleic acid. To investigate the properties of the superhydrophobic nanoparticles</em><em> with the chemical surface modification method, the contact angle test, SEM and FTIR were applied. The results of the water contact angle tests illustrated that the water contact angle of the surface covered with the modified zinc oxide, titanium dioxide, and boehmite nanoparticles was 158°, 163°, and 161°, respectively that proved the superhydrophobicity characteristic of this modified nanoparticles.</em>
nanoparticles,Superhydrophobic,Chemical surface modification,ZnO,TiO2,Boehmite
https://www.nsmsi.ir/article_25238.html
https://www.nsmsi.ir/article_25238_ad8390f7b1cac0635604a024bc81b866.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Study of Iron (III) and Cobalt (II) Acetylacetonatesin Organic Solvent Using Fluorescence and UV-Vis Spectrometry Method
83
91
FA
Mehrnoosh
Shahdoostkhany
Department of Chemistry, Faculty of Science, Alzahra University, Tehran, I.R. IRAN
mehrshahdoost@yahoo.com
Jila
Azad
Department of Chemistry, Faculty of Science, Alzahra University, Tehran, I.R. IRAN
jilaa.azaad@gmail.com
Kazem
Kargosha
Chemistry and Chemical Engineering Research Center of Iran, Tehran, I.R. IRAN
k_kargosha@yahoo.com
In this research, a spectrofluorimetric method has been used for studying complexes of Co(acac)<sub>2</sub> and Fe(acac)<sub>3</sub> in various organic solvents and different conditions.The qualitative method was based on measuring the decrease in fluorescence intensity of pure organic solvents such as dichloromethane, toluene and carbon tetrachloride after addition of acetylacetonates of iron (III) and cobalt (II). The intensity of the fluorescence emission peak was measured<em> at a different excitation wavelength and several solutions at a concentration range of 10<sup>3</sup>-10<sup>10</sup> mol/L</em><em> of Co(acac)<sub>2</sub> and Fe(acac)<sub>3</sub>. The spectrums from solutions in toluene in the region 306 nm and 440 nm with excitation wavelength 250 nm were found to be more suitable than the other spectrums. The range of concentration and type of complex caused different quenching effects on peak intensity of solvent. Absorption spectrums showed an increase in intensity with an increase in the concentration of complexes in solvents. The effect of different parameters such as the time length of solutions stability and solutions environment were studied. Consequently, </em><em>with respect to complexes quenching effects on the fluorescence intensity of solvents in different condition</em><em>, it is possible to use this effect for quantitative determination of both complexes in real samples.</em>
Cobalt (II) acetylacetonate,Fe (III) acetylacetonate,Spectrofluorimetry,Ultra Violet - Visible spectrometry,Quenching effect
https://www.nsmsi.ir/article_25245.html
https://www.nsmsi.ir/article_25245_fdd017cd6fa139d8b44f6cb567c680f3.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Experimental Study of Chitosan Coating Effect on Reducing Aggregation of Multiwall Carbon Nanotubes as a Career for Delivery of Anticancer “Quercetin” Drug
93
102
FA
Masoomeh
Nabitir
Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan,I.R. IRAN
m.nabitir@gmail.com
Seyed Foad
Aghamiri
Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, I.R. IRAN
aghamiri@eng.ui.ac.ir
Mohammad Reza
Talaie
Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, I.R. IRAN
mrtalaie@eng.ui.ac.ir
<em>Carbon nanotubes (CNTs) are used for many applications in the biomedical field such as drug delivery. Low biocompatibility and a high tendency for aggregation are the most problem of CNTs in drug delivery application. In this article effect of coating natural biocompatible polymer chitosan on reducing aggregation of multiwall carbon nanotubes as a carrier for delivery of anticancer “Quercetin” drug is studied. Synthesize of oxidized multiwall carbon nanotubes (OX-MWNT) and its modification with chitosan (CS-OXMWNT) was characterized by Fourier Transform InfraRed Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM). Dispersion of MWNT, OX-MWNT, CS-OXMWNT, and QC-CSOXMWNT in aqueous solution has been monitored by UV–Vis spectroscopy and turbidimeter analyze. According to UV–vis spectroscopy and turbidimeter analyses dispersion of CS-OXMWNT higher than MWNT, and decreases by drug loading. The turbidity of CS-OXMWNT and MWNT were 17.29 and 11.12 NTU respectively. The dispersion solutions are approximately stable for 24h.</em>
Aggregation,Carbon Nanotube,Drug Delivery,Quercetin,Chitosan
https://www.nsmsi.ir/article_26603.html
https://www.nsmsi.ir/article_26603_a1ede7eff0cc187fbe4ab3e6cc5c22d6.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Determination of Copper Ions in Arak Water Using Electro-Spun Nano Fiber Impregnated with Ligand Adsorbent
103
113
FA
Somaye
Mashhadi
Young Researchers and Elite Club, Arak Branch, Islamic Azad University, Arak, I.R. IRAN
somayemashhadi@gmail.com
Hosein
Mardani Tudeshki
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, I.R. IRAN
h.mardani266@yahoo.com
Mohammad
Alimoradi
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, I.R. IRAN
m.alimoradi599@ymail.com
<em>In this work, the Nanofibers were synthesized using electrospun of polystyrene solution in DMF/ THF solvent. The important parameters such as voltage, the distance between injector and collector, speed injection, the concentration of polystyrene and speed rotation of collectors in electrospun technique were optimized. Results showed that, within certain limits, by increasing the voltage, high Electro distance, low injection rate and high speed of the collector, we will get the Nanofibers with diameters less and regular chain structure. In optimal conditions, the average of polystyrene fibers diameter was 70-102 nm. Polystyrene absorbent modified by dithizone. By selecting the best conditions, the modified polystyrene Nanofibers were produced with an average diameter of 73-126 nm. The synthesized polystyrene Nanofibers were used </em><em>for preconcentration of Copper in wastewater samples. The effective parameter on extraction such as</em> adsorbent amount, pH, type and volume of eluent solvent and salt amount was evaluated and optimized with “one at the<em> time” method. According to the results, optimum conditions are the solid phase: 0/006 gr, pH = 7,</em><em> eluent solvent: acetonitrile solution with a volume of 0/7 mL, 1/3 g amount of potassium nitrate salt. This method was applied to real samples and good results were obtained. High enrichment factors and very good detection limit are highlights of this method.</em>
Electro-Span,Nanofibers,Polystyrene,Modifier,copper,Solid phase extraction
https://www.nsmsi.ir/article_27260.html
https://www.nsmsi.ir/article_27260_24fd66a1ddd7d8e38b5c65f3f34d9feb.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Taguchi Experimental Design for Simultaneous Absorption of Chromium and Copper from Wastewater by Chitosan
115
124
FA
Mona
Eidizadeh
Faculty of Petroleum, Gas, and Petrochemical Engineering (FPGPE), Persian Gulf University (PGU), P.O. Box 75169-13817 Bushehr, I.R. IRAN
mona@gmail.com
Ahmad
Azari
Faculty of Petroleum, Gas, and Petrochemical Engineering (FPGPE), Persian Gulf University (PGU), P.O. Box 75169-13817 Bushehr, I.R. IRAN
azari.ahmad@gmail.com
The aim of this study is the parametric optimization of simultaneous absorption of chromium and copper from wastewater by chitosan by using Taguchi experimental design. So chitosan of Shrimp was used as an adsorbent. Experiments were performed in batch mode. The effect of five parameters including adsorbent dosage, contact time, pH (each case in 4 levels), temperature and initial concentration (each case in 3 levels) were investigated. The results clearly show<em> that adsorbent dosage and temperature has the highest and lowest effect in the removal efficiency, respectively. Maximum efficiency for simultaneous removal of chromium and copper was</em><em> obtained 86.04% and 79.06%, respectively, at the condition of 20 ppm concentration, 0.16 g adsorbent dosage at pH 4 and contact time of 90 min. Adsorbent kinetic obey the pseudo-second-order model.</em>
Chitosan,Adsorption,Adsorption isotherm,Chromium and copper,Synthetic wastewater, Taguchi
https://www.nsmsi.ir/article_25242.html
https://www.nsmsi.ir/article_25242_f9cae1274999e203fbd25ce3115b230c.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Methane and Ethane Solubility in Pure Water and Salt Solutions of Sodium Chloride and Magnesium Chloride at Low Temperature and Non-Hydrate Formation Conditions
125
131
FA
Javad
Abdi
Ahwaz Petroleum Faculty, Petroleum University of Technology (PUT), Ahwaz, I.R. IRAN
javad.abdi1992@put.ac.ir
Vahid
Mohebbi
Ahwaz Petroleum Faculty, Petroleum University of Technology (PUT), Ahwaz, I.R. IRAN
mohebbi@put.ac.ir
Reza
Mosayebi Behbahani
Ahwaz Petroleum Faculty, Petroleum University of Technology (PUT), Ahwaz, I.R. IRAN
behbahani@put.ac.ir
<em>In this study, an equilibrium cell was used to measure the solubility of methane and ethane in pure water and aqueous solutions of sodium chloride and magnesium chloride in non-hydrate formation condition. Methane solubility measurements in pure water have been conducted at temperatures of (275<sub>/</sub>15 to 300<sub>/</sub>15) K and pressures of (20, 30 and 40) bar and for aqueous solutions of sodium chloride and magnesium chloride at temperatures of (275.15 to 290.15) K, pressures of (20 and 30) bar and molalities of (0.529, 1.092 and 1.692) mol/kg and (0.325, 0.670 and 1.039) mol/kg, respectively. Also, the solubility of ethane in pure water have been investigated at temperatures of (274<sub>/</sub>15 to 282<sub>/</sub>15) K and pressures of (2, 4 and 6) bar and for aqueous solution of sodium chloride at modalities of (1.901 and 3.020) mol/kg, temperatures of (273.15 to 278.15) K and pressures of (4 and 8) bar and for aqueous solution of magnesium chloride at </em>molalities<em> of (0.325 and 0.791) mol/kg, temperatures of (279.15 to 285.15) K and pressures of (4 and 8) bar. In addition, the thermodynamic models of Duan et al. and Mao et al. were used to calculate the solubility of methane and ethane gases in aqueous solutions of sodium chloride and magnesium chloride. The solubility of methane and ethane were found to decrease by increasing temperature and concentration, but with increasing pressure, the opposite behavior was observed. It can also be stated that the thermodynamic models showed good adaptation with experimental results.</em>
Solubility,Methane,Ethane,Sodium chloride,Magnesium chloride
https://www.nsmsi.ir/article_26237.html
https://www.nsmsi.ir/article_26237_ea0dd2ff4d7ae1465e76e5d61426737b.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Molecular Dynamics Simulation of Oxygen and Nitrogen Mixture on Carbon Nanocone and Nanotube
133
141
FA
Roya
Majidi
Department of Physics, Faculty of Science, Shahid Rajaee Teacher Training University, Tehran, I.R. IRAN
royamajidi@gmail.com
Khadijeh
Mansouri
Department of Physics, Faculty of Science, Shahid Rajaee Teacher Training University, Tehran, I.R. IRAN
Adsorption and storage of oxygen and nitrogen with 240º carbon Nanocone were studied and results were compared with (10,10) carbon nanotube. Adsorption amount of gases at constant temperature and different pressures was calculated by using the molecular dynamics method<em>. The simulation results indicated that gases were adsorbed on external and internal surfaces of carbon Nanocone and carbon nanotube. Adsorption amount was increased and finally saturated </em><em>by increasing pressure. It was found that oxygen adsorption was higher than nitrogen adsorption on both structures. Also, carbon Nanocones showed higher adsorption and separation capacity </em><em>than carbon nanotubes. Therefore, carbon nanocones are a proper candidate for storage and separation</em><em> of oxygen of the air.</em>
Molecular Dynamics Simulation,Carbon nanocone,Carbon Nanotube,NVT ensemble,Gas separation
https://www.nsmsi.ir/article_25226.html
https://www.nsmsi.ir/article_25226_6abbc8e8c1c678773a004dddb1233709.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Grading Effect of Ammonium Perchlorate on Mechanical Properties of Propellant Based on Glycidyl Azide Polymer
143
149
FA
Saeed
Babaee
Chemistry and Chemical Engineering Complex, Malek-Ashtar University of Technology,
P.O. Box 15875-1774 Tehran, I.R. IRAN
safnba@gmail.com
<em>Composite solid propellant containing aluminum (Al), ammonium perchlorate (AP) particles and </em><em>glycidyl </em><em>azide polymer (GAP) are used in various missiles and rockets as high energy propellants. Selections of particles size and grading type in the propellant formulations, with a change in the viscosity and rheological properties of the propeller slurry, have a great effect </em><em>on the mechanical and ballistic properties of the final product. In this paper in addition to introducing</em><em> various classes of propellants with different grading, several samples of Al-AP/GAP propellants were prepared and along with their properties comparing, the propellant with the optimum class </em><em>was presented. The results showed that the best mechanical properties belonged to a propellant</em><em> containing three different grading of AP (20, 100 and 250 microns). Mechanical properties of this sample under optimal conditions was obtained of yang modulus 4.16 megapascal (MPa), yield stress 0.49 MPa, yield strain 12 %, stress at failure 0.2 MPa, strain at failure 20 %, toughness 28.8 kJ/m<sup>3</sup> and hardness 64 Shore A.</em>
Composite solid propellant,Ammonium perchlorate,Glycidyl azide polymer,grading,Mechanical properties
https://www.nsmsi.ir/article_25224.html
https://www.nsmsi.ir/article_25224_8103c1290a4250e79878030f20e5280e.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Investigation of the Effect of Alkyl Chain Length and Anion Type on the Thermo Physical Properties of the Ionic Liquids
Using Two Versions of the SAFT Equation of State
151
164
FA
Maryam
Dargahi
Department of Chemistry, Faculty of Science, Imam Khomeini International University, P.O. Box 288, Qazvin, I.R. IRAN
dargahi@sci.ikiu.ac.ir
Leila
Mousavi
Department of Chemistry, Faculty of Science, Imam Khomeini International University, P.O. Box 288, Qazvin, I.R. IRAN
leila.musavi@ymail.com
<em>In this study, the pressure-volume behavior and some of the second-order thermophysical properties such as heat capacity and speed of sound for a family of imidazolium-based ionic liquids using the SAFT Equation of States (EoSs) were calculated and the effect of alkyl </em><em>chain length and anion type on these properties were investigated. Two version of SAFT EoSs were used</em><em> for calculation of thermophysical properties of ionic liquids: 1. PC-SAFT 2. Heterosegmented SAFT, both of them have very good ability for the prediction of the Helmholtz free energy and first-order thermophysical properties such as pressure-volume behavior. But in the prediction of second order thermophysical properties such as heat capacity at constant volume, heat capacity at constant pressure and speed of sound, have not accurate and performance. Also, the equations do not show the process of change in alkyl chain length and anion type on the second order thermophysical properties well.</em>
Ionic liquids,Thermophysical properties,Equation of state,PC-SAFT,Heterosegmented SAFT
https://www.nsmsi.ir/article_27265.html
https://www.nsmsi.ir/article_27265_ac66b30d9b79ceceefc35693e4f8b713.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Thermo Economic Analyses of an Organic Rankine Cycle to Produce Combined Heat and Power Based on Various Energy Resources in Ardebil State
165
185
FA
Leyli
Ariyanfar
Department of Mechanical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, I.R. IRAN
leyliariyan@gmail.com
Morteza
Yari
Faculty of Mechanical Engineering, University of Tabriz, Tabriz, I.R. IRAN
yarimortaza@yahoo.com
Ebrahim
Abdi Aghdam
Department of Mechanical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, I.R. IRAN
eaaghdam@uma.ac.ir
In this research, thermodynamically design and also technical, economic and environmental studies of an organic Rankine cycle have been performed to produce combined heat and power (CHP). Along with the technical evaluation of affecting parameters on the cycle, the importance and effectiveness of each parameter are considered too. Various type of energy sources such as solar, biomass and geothermal as renewable resources based on Ardebil state conditions and natural gas as fossil fuel have been studied and their generated power prices have been compared. Also, it is tried that by using a proposed two-step condenser, in order to use the outlet heat of condenser, its temperature keeps high as<em> much as possible such that the hot flow is useable to produce heat in addition to power. With comparing</em><em> the thermal and exergy efficiencies for power generation and cogeneration of heat and power (CHP) cases it is observed that because of optimized usage of energy resources in the CHP, the efficiencies increase 5.71% and 5.45% from thermal and exergy standpoints, respectively. As well as from an environmental perspective, it is estimated that annual 3.297×10<sup>6</sup> dollars saving from not impose external costs will be made by CHP in the renewable energy resource systems</em><em>.</em>
Organic Rankine Cycle,Cogeneration of heat and power,Solar,Biomass,Geothermal
https://www.nsmsi.ir/article_25325.html
https://www.nsmsi.ir/article_25325_3845aae8192510dac8113911c8672607.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Investigation of Permeability Change Due to Salt Precipitation during CO2 Sequestration
187
197
FA
Javad
Jeddizahed
Institute of Petroleum Engineering, School of Chemical Engineering, College of Engineering,
University of Tehran, Tehran, I.R. IRAN
j.jeddizahed@gmail.com
Behzad
Rostami
Institute of Petroleum Engineering, School of Chemical Engineering, College of Engineering,
University of Tehran, Tehran, I.R. IRAN
brostami@ut.ac.ir
<em>Carbone capture and sequestration (CCS) is one of the most effective methods for reducing CO<sub>2</sub> emissions into the atmosphere. Saline aquifer offers the highest level of CO<sub>2</sub> storage. </em><em>The injection of high volume gas into underground reservoirs contributes salt precipitation in the area</em><em> around the injection well. Sine a high volume of CO<sub>2</sub> has to be injected into underground reservoirs, at least 30 years, injectivity is an important phenomenon. Near wellbore salt precipitation due to evaporation leads to a reduction in injectivity. In this study, we investigated the effects of injection rate and salinity on injectivity due to salt precipitation. The results show that, by changing the injection rate and salinity, some interacting factors affect injectivity which </em><em>determines</em> ultimate injectivity. The final permeability analysis demonstrates salt precipitation decreases with injection rate while salinity has an opposite effect. The Peclet number analysis displays salt precipitation profile is affected by both injection rate and salinity, however, injection rate has a marked effect on<em> injectivity. The results of this study were used to calibrate the permeability alteration model due to salt</em><em> precipitation.</em>
Sequestration,CO2,Salt precipitation,Permeability,Evaporation,Sandstone rock sample
https://www.nsmsi.ir/article_25200.html
https://www.nsmsi.ir/article_25200_99bd12d27726626fe9c47fdffb2bd223.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Experimental Investigation and Proposed Empirical Correlations for the Valve Tray in a Commercial Scale in the Lower and Upper Operational Limits
199
209
FA
Taleb
Zarei
0000-0002-4823-8507
Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas, I.R. IRAN
talebzarei@gmail.com
Masoud
Farsiani
Young Researchers Club, Sirjan Branch, Islamic Azad University, Sirjan, I.R. IRAN
masoudfarsiani@yahoo.com
Ehsan
Abedini
Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas, I.R. IRAN
ehsan.abedini@gmail.com
<em>The valve tray is one of the most used trays in distillation and absorption towers in the petroleum, petrochemical and other industries. In this study, the hydrodynamic behavior </em><em>of the valve, the tray has been studied in a tower with 1.2m diameter with an air-water system. The test tower</em><em> has two valve trays with a free surface area of 14%. The experimental results of clear liquid height, froth height, average liquid hold up, total pressure drop, dry pressure drop, weeping and entrainment have been presented. Empirical correlations for these parameters have been proposed. The upper and lower operating limits were analyzed and evaluated. The validation of the empirical correlation has been examined. The results show that the gas flow velocity on the hydrodynamic parameters has a greater effect than the liquid flow velocity on the tray and the valve tray has more flexibility than the variations in the liquid flow rate.</em>
Valve tray,Hydrodynamics,Weeping,Entrainment,Clear liquid height
https://www.nsmsi.ir/article_26005.html
https://www.nsmsi.ir/article_26005_6dcf643b1ed7376a36295cb9ac65c7b8.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
The Investigation of Critical Impeller Speed in a Laboratory Mechanical Flotation Cell
211
223
FA
Hosna
Darabi
Mineral Processing Dept., Tarbiat Modares University, Tehran, I.R. IRAN
hosna.darabi@modares.ac.ir
Seyed Mohammad Javad
Koleini
Mineral Processing Dept., Tarbiat Modares University, Tehran, I.R. IRAN
koleini@modares.ac.ir
Bahram
Rezai
Department of Mining & Metallurgical Engineering, Amirkabir University of Technology, Tehran, I.R. IRAN
rezai@aut.ac.ir
Mahmoud
Abdollahy
Mineral Processing Dept., Tarbiat Modares University, Tehran, I.R. IRAN
minmad@modares.ac.ir
<em>One of the important steps in flotation is particle collection that occurs after </em><em>the successful particle-bubble interaction. Effective solids suspension is a necessary preconditioning</em><em> for particle </em><em>collection and flotation. The critical impeller speed, N<sub>js</sub>, is commonly used to indicate the effectiveness of solids suspension. The critical impeller speed refers to the minimum impeller speed where all the solids are just suspended off the bottom of the cell. In this paper, </em><em>two correlations for predicting the critical impeller speed in terms of particles size (</em><em>d<sub>p</sub></em><em>), relative solids</em><em> density (</em><em>ρ<sub>s</sub>-ρ<sub>l</sub></em><em>), solids concentration (</em><em>X</em><em>), liquid viscosity (</em><em>v<sub>L</sub></em><em>) and superficial gas rate (</em><em>J<sub>g</sub></em><em>) in two and three phases conditions have been developed. The study was conducted in a laboratory flotation cell using four size fractions of quartz, barite, and galena. The results indicated that </em><em>ρ<sub>s</sub>-ρ<sub>l</sub></em><em>, </em><em>d<sub>p</sub></em><em>,</em><em> X</em><em> and </em><em>v<sub>L</sub></em><em> are the most important variables, respectively. The critical impeller speed increased linearly </em><em>with increasing </em><em>J<sub>g</sub></em><em>. Investigation of concentration profiles versus the relative height of the cell showed</em><em> that suspension heights consistently reached a level equivalent to 0.80-0.85 of the cell height at </em><em>the critical impeller speed. Homogeneous suspension condition will only be approached as the impeller</em><em> speed was increased to approximately 120–150% of the critical impeller speed. This range can be used to predict the optimum impeller speed in order to increase the flotation efficiency.</em>
Laboratory mechanical flotation,Solids suspension,Critical impeller speed,Optimum impeller speed
https://www.nsmsi.ir/article_24046.html
https://www.nsmsi.ir/article_24046_fa61e27bebb67e3205a6709901bad317.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Investigation of Stenosis Effects on Wall Shear Stress
225
231
FA
Fatemeh
Bahadori
Chemical Engineering Department, Urmia University of Technology, Urmia, Iran
f.bahadori@che.uut.ac.ir
Najibeh
Alizadeh
Chemical Engineering Department, Urmia University of Technology, Urmia, Iran
n.alizadeh70@yahoo.com
Majid
Hajyhosseinloo
Dr. Hamadanchi Doctors' Building, North Khayyam St., Urmia, I.R. IRAN
hhoseinloom@yahoo.com
<em>Blood flow to the living tissues of the body is the most critical processes in living organisms. Blood pressure and velocity in the blood vessels depend on the pumping ability of the heart rate, vessel diameter and flexibility, and the presence or absence of stenosis. Computational simulation and modeling is an effective tool to investigate the behavior of blood flow. Using the mentioned method it can be obtained detailed information about velocity profile, shear stress, pressure drops, stagnation points, stenosis, and clotting. In this paper, Computational Fluid Dynamics (CFD) is used to investigate aggregation of red blood cells in a rigid vessel wall while asymmetric stenosis occurred within it. The governing equations of the momentum, shear stress on the wall of blood vessel, and red blood cells movement in both normal and in the presence of a clot are numerically solved. The simulation results show that the presence of a clot in blood significantly affects the velocity, pressure, and shear stress, especially in stenosis.</em>
Vessel,Stenosis,Clot,Shear stress
https://www.nsmsi.ir/article_25207.html
https://www.nsmsi.ir/article_25207_32cf8956c79f3c6baf88a9b50b7562d2.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Nashrieh Shimi va Mohandesi Shimi Iran
1022-7768
36
3
2017
10
23
Performance Evaluation of a Ttrickling Bioreactor Inoculated with Ralstonia eutropha for Removal of Toluene Vapor
233
241
FA
Abbas
Alinejad
Biotechnology Group, Faculty of Chemical Engineering, Tarbiat Modares University (TMU),
Tehran, I.R. IRAN
a.alinejad@modares.ac.ir
Seyed Morteza
Zamir
Biotechnology Group, Faculty of Chemical Engineering, Tarbiat Modares University (TMU),
Tehran, I.R. IRAN
zamir@modares.ac.ir
Seyed Abbas
Shojaosadati
Biotechnology Group, Faculty of Chemical Engineering, Tarbiat Modares University (TMU),
Tehran, I.R. IRAN
shoja_sa@modares.ac.ir
<em>Among different technologies for the removal of Volatile Organic Compounds (VOCs) from the polluted industrial air, biological methods are more attractive as they are cost-effective, have high performance for the removal of VOCs at low concentration and not producing any secondary waste stream. BioTrickling Filtration (BTF) is one of the most recognized biological methods for removing VOCs from the air. Evaluation of the performance of the BTFs over the operation time is very important. In this research, the performance of a BTF packed with Pall ring and pumice and inoculated with Ralstonia eutropha was evaluated for treating toluene vapor for 100 days. The experiments were conducted at Empty Bed Residence Times (EBRTs) of 90 s and 45 s, and inlet concentration of 0.5-4 g/m<sup>3</sup>. The maximum Elimination Capacity (EC) was obtained as 280 g/m<sup>3</sup>h. 3.3 mole CO<sub>2</sub>was produced per mole of toluene consumed by the bacteria, therefore, with regards to the bacteria formulation and production of HCl during the treating process, the biodegradation equation for treating toluene was characterized.</em>
Toluene,Biotrickling filter,,Volatile organic compound,Air pollution
https://www.nsmsi.ir/article_26000.html
https://www.nsmsi.ir/article_26000_01a66ea5892452f6c23a60f54669fa19.pdf