ORIGINAL_ARTICLE
Synthesis, Growth Mechanism, and Applications of Titania/Titanate Nanotubes
The synthesis methods for titania/ titanate nanotubes can be split into two categories: template and non-templated procedures. The templates can be classified into positive and negative (include: oregano gelator, macroporous alumina membranes, carbon nanotubes, surfactant) that synthesized nanotubes with diameters > 50 nm. The non-templating methods include alkaline hydrothermal, anodization of titanium in fluoride bathing, seeded growth. The key to developing and exploiting new nanostructured materials lies in an improved knowledge of how synthesis conditions affect properties of nanostructured materials in order to tailor materials to specific needs, In particular, a knowledge of the mechanism of nanostructure formation is very important. In this paper, synthesis methods, microstructure, mechanism of formation and growth and their advantages and disadvantages for these nanotube reported by researchers are reviewed. The nanotube morphology, the highly surface area, and pore volume, render titania/titanate nanotubes promoting materials for many applications in different fields which include energy conversion and storage, catalysis, electro catalysis, photo catalysis, magnetic materials, drug delivery, bio-applications, composites, surface finishing, tribological coatings.
https://www.nsmsi.ir/article_19873_0015ebef3a9b6336b1f869910ca349ce.pdf
2016-12-01
1
22
Nanotubes
Synthesis
Titania
Titanate
Mechanism of formation
application
Maryam
Safaei
safaeim@ripi.ir
1
Research Institute of Petroleum Industry (RIPI), P. O. Box 18754-4163 Tehran, I.R. IRAN
LEAD_AUTHOR
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ORIGINAL_ARTICLE
Thermodynamics and Isotherm Studies of Adsorption of Cadmium (II) on Zinc Oxide Nanoparticle
Cadmium as heavy and toxic metal is commonly found in water resource. It has made significant environmental issue. In this research, zinc oxide nanoparticle was prepared by sol-gel method, it was also evaluated with XRD, SEM techniques. Factors relevant to absorption processes such as the concentration of initial ion and temperatures were investigated. As a result, increasing the concentration and temperature, lead to increase, and decrease the absorption respectively. Thermodynamics of adsorption of cadmium (II) on zinc oxide nanoparticle at different temperatures were studied. Therefore, thermodynamic factors were shown that the absorption process was spontaneous, exothermic and reversible. The obtained absorption isotherms obviously showed that Langmuir model preferable than other models.
https://www.nsmsi.ir/article_19874_a3da1779f2365b353979947311783f64.pdf
2016-12-01
23
30
Zinc oxide nanoparticle
Cadmium(II)
Isotherm of adsorption
Thermodynamics
Abbas
Hamidi
abashamidi.s@gmail.com
1
Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, I.R. IRAN
LEAD_AUTHOR
Elaheh
Khazaeli
2
Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, I.R. IRAN
AUTHOR
Fereidon
Khazali
3
Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, I.R. IRAN
AUTHOR
[1] Khairia M., Qahtani Al., Assessment and Treatment some of the Local Seeds then used in Removal of Heavy Metals , J. American Science ,11: 198-203
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[3] Hannora E.A., Ataya S., Structure and Compression Strength of Hydroxyapatite/titania Nanocomposites Formed by High Energy Ball Milling, J Alloys and Compounds, 658: 222-233 (2016).
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[5] Rohini Kitture, Soumya J. Koppikar, Ruchika Kaul-Ghanekar, S.N. Kale, Catalyst Efficiency, Photostability and Reusability Study of ZnO Nanoparticles in Visible Light for Dye Degradation, J. Physics and Chemistry of Solids ,72: 60-66 (2011).
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13
ORIGINAL_ARTICLE
Removal of Strontium (II) from Aqueous Solution by Adsorption Using Xerogel Synthesized by TEOS: Kinetics and Thermodynamics Study
TEOS xerogel was investigated as adsorbent to removal strontium ion from aqueous solution in batch operations. Batch experiments were carried out as a function of pH, initial concentration, time, and temperature. Simple kinetic and thermodynamic models have been applied to the rate and isotherm sorption data and kinetic and thermodynamic parameters were determined. These studies were showed that the Langmuir isotherm model and pseudo-second-order kinetic model were fitted well with experimental data. The maximum capacity of the adsorbent for Sr(II) is 17 mg/g. The paper discusses the thermodynamic parameters of the adsorption (the Gibbs free energy, entropy, and enthalpy). Results demonstrate that the adsorption process was spontaneous and endothermic under natural conditions.
https://www.nsmsi.ir/article_19875_0c178f38f5c1ebd759b29203c1b023f8.pdf
2016-12-01
31
43
Strontium
Xerogel
Adsorption
Isotherm
Kinetics
Batch experiment
Mozhgan
Shamsodin
m.shamsodin.1390@gmail.com
1
Department of Chemistry, College of Science, Semnan University, Semnan, I.R. IRAN
LEAD_AUTHOR
Mostafa
Fazli
mfazli@semnan.ac.ir
2
Department of Chemistry, College of Science, Semnan University, Semnan, I.R. IRAN
AUTHOR
Masoud
Nasiri
mnasiri@semnan.ac.ir
3
Department of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, I.R. IRAN
AUTHOR
Kamalodin
Haghbeen
kamahl@nigeb.ac.ir
4
Faculty of Science, National Institute for Genetic Engineering and Biotechnology, Tehran, I.R. IRAN
AUTHOR
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J. Hazard. Mater. 151: 432-445 (2008).
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[33] Marešova J., Pipiška M., Rozložnik M., Hornik M., Remenarova L., Augustin J., Cobalt and Strontium Sorption by Moss Biosorbent: Modeling of Single and Binary Metal Systems, Desalination, 266: 134–141(2011).
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[34] Wu P., Daia Y., Longa H., Zhua N., Li P., Wua J., Danga Z., Characterization of Organo-Montmorillonites and Comparison for Sr(II) Removal:Equilibrium and Kinetic Studies, Chem. Eng. J., 191: 288-296 (2012).
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[35] Tel, H. Altas¸ Y., Eral, M. enol Sert, S.B.C, Etinkaya, S, I˙nan, Preparation of ZrO2 and ZrO2–TiO2 Microspheres by the Sol–Gel Method and An Experimental Design Approach to their Strontium Adsorption Behaviours, Chem. Eng. J. 161: 151–160 (2010).
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[36] Elouear Z., Bouzid J., Boujelben N., Feki M., Jamoussi F., Montiel A., Heavy Metal Removal from Aqueos Solution by Actived Phosphate Rock, J. Hazard. Mater., 156: 412-420 (2008).
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[37] Jain C.K., Singhal D.C., Sharma M.K., Adsorption of Zinc on Bed Sediment of River Hindon: Adsorption Model and Kinetics, J. Hazard. Mater., 114: 231-239 (2004).
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[38] Seker A., Shahwan T., Eroglu A.E., Yilmaz S., Demirel Z., Conk Dalay M., Equilibrium, Thermodynamic and Kinetic Studies for the Biosorption of Aqueous Lead(II), Cadmium(II) and Nickel(II) Ions on Spirulina Platensis, J. Hzard. Mater., 154: 973-980(2008).
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[39] El Nemr A., Potential of Pomegranate Husk Carbon for Cr Removal from Wastewater: Kinetic and Isotherm Studies, J. Hzard. Mater., 161: 132-141 (2009).
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[40] Jain M., Garg V.K., Kardirvelu K., Choromium Removal from Aqueous System Using Helianthus Annuus (Sunflower) Stem Waste, J. Hzard. Mater., 162: 365-372 (2009).
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[41] Kumar R., Abraham T.N., Jain S.K., Silver Nano Particles Impregnated Alumina for the Removal of Strontium(II) from Aqueous Solution, Adv. Mat. Lett., 3(6): 507-510 (2012).
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[42] Srinivasa Rao, K. Roy Chaudhury, G, B. Mishra, K. Kinetics and Equilibrium Studies for the Removal of Cadmium Ions from Aqueous Solution Using Duolite ES 467 Resin, J. Miner. Process, 97: 68-73 (2010).
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[45] Wang X.S., Li Z.Z., Tao S.R., Removal of Chromium from Aqueous Solution Using Walnut Hull, JEM, 90: 721-729 (2009).
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[46] Aksu Z., Determination of the Equilibrium , Kinetic and Thermodynamic and Equilibrium Studies, J. Process Biochem., 38:89-99 (2002).
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[47] Madaeni S.S., Salehi E., Adsorption of Cations on Nanofiltration Membrane: Separation Mechanism, Isotherm Confirmation and Thermodynamic Analysis, J. Chem. Eng., 150: 114-121 (2009).
48
ORIGINAL_ARTICLE
Thermodynamic Modeling of Carbon Dioxide Solubility in Aqueous Methyl Di Ethanolamine Using Cubic Plus Association Equation of State (CPA)
In this work, Vapor-Liquid Equilibrium (VLE) of the 3-component system composed of carbon dioxide (1), water (2), and methyl diethanolamine (3) has been modeled by the cubic plus association equation of state in a wide range of temperatures (313 –433 K), pressures (0.775 –4,930 kPa), and methyl diethanolamine wt% (5 –75). The 3-component system composed of carbon dioxide, water, and methyl diethanolamine was modeled by two different approaches. In the first approach, binary interaction coefficient between carbon dioxide and methyl diethanolamine was set equal to zero and energy and volume of association between carbon dioxide and methyl diethanolamine were optimized. In the second approach, the average energy of association between carbon dioxide and methyl diethanolamine at different temperature and amine wt% that was obtained in the first approach was used and volume of association and binary interaction between carbon dioxide and methyl diethanolamine were optimized. In both approaches, carbon dioxide has been considered as two association schemes: 1) as an association molecule with 3B and 4C association schemes, 2) as a non-association molecule. The results obtained in this work showed a good compatibility with the experimental data for this 3-component system. Comparison the results between this work and the Clegg-Pitzer and N-Wilson-NRF models reveals that the cubic plus association model leads to more convincing results than both of them. Furthermore, results obtained from the 4C association scheme for carbon dioxide in the cubic plus association equation of state shows a lesser error compared to 3B association scheme and to non-association scheme.
https://www.nsmsi.ir/article_19876_a584f63837cea53edd2ade6db97245e9.pdf
2016-12-01
45
57
molybdenum
Molybdenite concentrate
Electro oxidation
energy consumption
electrolysis
Seyed Hamid
Hosseini
1
Department of Chemical Engineering, Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr, I.R. IRAN
AUTHOR
Amir Abbas
Izadpanah
izadpanah@pgu.ac.ir
2
Department of Chemical Engineering, Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr, I.R. IRAN
LEAD_AUTHOR
Hosein
Rahideh
rahideh@pgu.ac.ir
3
Department of Chemical Engineering, Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr, I.R. IRAN
AUTHOR
[1] Danckwerts P.V., McNeil K.M., The Absorption of Carbon Dioxide into Aqueous Amine Solutions and the Effects of Catalysis, Trans. 1nst. Chemical Engineers, 45: 32-49 (1967).
1
[2] Kent R.L., Eisenberg B., Better Data for Amine Treating, Hydrocarbon Process, 55: 87-90 (1976).
2
[3] Jou F.Y., Mather A.E., Otto F.D., Solubility of H2S and CO2 in Aqueous Methyldiethanolamine Solutions, Industrial and Engineering Chemistry Process Design and Development, 21: 539-544 (1982).
3
[4] Deshmukh R.D., Mather A.E., A Mathematical Model for Equilibrium Solubility of Hydrogen Sulfide and Carbon Dioxide in Aqueous Alkanolamine Solutions, Chemical Engineering Science, 36:355-362 (1981).
4
[5] Austgen D.M., Rochelle G.T., Chen C.C., Model of Vapour-Liquid Equilibria for Aqueous Gas-Alkanolamine Systems. 2. Representation of H2S and CO2 Solubility in Aqueous MDEA and CO2 Solubility in Aqueous Mixtures of MDEA with MEA or DEA, Industrial and Engineering Chemistry Research, 30: 543-555 (1991).
5
[6] Posey M.L., Rochelle G.T., A thermodynamic Model of Methyldiethanolamine-CO2-H2S-Water, Industrial and Engineering Chemistry Research, 36: 3944-3953 (1997).
6
[7] Gabrielsen J., Michelsen M.L., Stenby E.H., Kontogeorgis G.M., A Model for Estimating CO2 Solubility in Aqueous Alkanolamines, Industrial and Engineering Chemistry Research, 44: 3348-3354 (2005).
7
[8] Haghtalab A., Shojaeian A., Modeling Solubility of Acid gases in Alkanolamines Using the Nonelectrolyte Wilson-Nonrandom Factor Model, Fluid Phase Equilibria, 289: 6–14 (2010).
8
[9] Haghtalab A., Dehghani Tafti M., Electrolyte Uniquac-NRF Model to Study the Solubility of Acid Gases in Alkanolamines, Industrial and Engineering Chemistry Research, 46: 6053-6060 (2007).
9
[10] Goharrokhi M., Taghikhani V., Ghotbi C., Safekordi A.A., Najibi H., Correlation and Prediction of Solubility of CO2 in Amine Aqueous Solutions, Iranian Journal of Chemistrry and Chemical Engineering (IJCCE), 29(1): 111-124 (2010).
10
[11] Téllez-Arredondo P., Medeiros M., Modeling CO2 and H2S Solubilities in Aqueous Alkanolamine Solutions via an Extension of the Cubic-Two-State Equation of State, Fluid Phase Equilibria, 344: 45-58 (2013).
11
[12] Zoghi A.T., Feyzi F., Dehghani M.R., Modeling CO2 Solubility in Aqueous N-Methyldiethanolamine Solution by Electrolyte Modified Peng-Robinson Plus Association Equation of State, Industrial & Engineering Chemistry Research, 51: 9875-9885 (2012).
12
[13] Haghtalab A., Mazloumi S.H, Electrolyte Cubic Square-Well Equation of State for Computation of the Solubility CO2 and H2S in Aqueous MDEA Solutions, Industrial & Engineering Chemistry Research, 49: 6221–6230 (2010).
13
[14] Vallée, G., Mougin, P., Jullian, S., Fürst, W., Representa-tion of CO2 and H2S Absorption by Aqueous Solutions of Diethanolamine Using an Electrolyte Equation of State, Industrial and Engineering Chemistry Research, 38: 3473-3480 (1999).
14
[15] Chunxi L., Fürst W., Representation of CO2 and H2S in Aqueous MDEA Solutions Using an Electrolyte Equation of State, Chemical Engineering Science, 55: 2975-2988 (2000).
15
[16] Button J.K., Gubbins K.E., SAFT Prediction of Vapor Liquid Equilibria of Mixtures Containing Carbon Dioxide and Aqueous Monoethanolamine or Diethanolamine, Fluid Phase Equilibria, 158-160: 175-181 (1999).
16
[17] Nasrifar Kh., Tafazzol A.H., Vapor-Liquid Equilibria of Acid Gas-Aqueous Ethanolamine Solutions Using the PC-SAFT Equation of State, Industrial and Engineering Chemistry Research, 49: 7620-7630 (2010).
17
[18] Tsivintzelis I., Kontogeorgis G.M, Michelsen M.L., Stenby E.H., Modeling Phase Equilibria for Acid gas Mixtures Using the CPA Equation of State. Part II: Binary Mixtures with CO2, Fluid Phase Equilibria, 306: 38–56 (2011).
18
[19] Oliveira M.B., Queimada A.J., Kontogeorgis G.M., Coutinho J.A.P.,, Evaluation of the CO2 Behavior in Binary Mixtures with Alkanes, Alcohols, Acids and Esters Using the Cubic-Plus-Association Equation of State, The Journal of Supercritical Fluids, 55: 876-892 (2011).
19
[20] Kaarsholm M., Derawi S.O., Michelsen M.L., Kontogeorgis G.M., Extension of the Cubic-plus-Association (CPA) Equation of State to Amines, Industrial and Engineering Chemistry Research, 44: 4406-4413 (2005).
20
[21] Avlund A.S., Kontogeorgis G.M., Michelsen M.L., Modeling Systems Containing Alkanolamines with the CPA Equation of State, Industrial and Engineering Chemistry Research, 47: 7441–7446 (2008).
21
[22] Kontogeorgis G.M., Yakoumis I.V., Meijer H., Hendriks E., Moorwood T., Multicomponent Phase Equilibrium Calculations for Water-Methanol-Alkane Mixtures, Fluid Phase Equilibria, 158-160:201–209 (1999).
22
[23] Breil M.P., Tsivintzelis I., Kontogeorgis G.M., Modeling of Phase Equilibria with CPA Using the Homomorph Approach, Fluid Phase Equilibria, 301:1-12 (2011).
23
[24] Rho S-W., Yoo K-P., Lee J.S., Nam S.C., Son J.E., Min B.M., Solubility of CO2 in Aqueous Methyldiethanolamine Solutions, Journal of Chemical and Engineering Data, 42: 1161-1164 (1997).
24
[25] Chakma A. and Meisen A., Solubility of CO2 in Aqueous Methyldiethanolamine and N,N-Bis(hydroxyethy1) Piperazine Solutions, Industrial and Engineering Chemistry Research, 26: 2461-2466 (1987).
25
[26] Li Y.G., Mather A.E., Correlation and Prediction of the Solubility of CO2 and H2S in Aqueous Solutions of Methyldiethanolamine, Industrial and Engineering Chemistry Research, 36:2760-2765 (1997).
26
ORIGINAL_ARTICLE
Phase Equilibrium of Ternary System Carbon Dioxide+ Toluene + Naphthalene on GAS Process
In the present research, the equilibrium data of ternary systems, carbon dioxide- toluene- naphthalene is determined by using a high-pressure apparatus. Mentioned data is measured between 298.15 K and 308.15 K and pressure at 9.6 to 75.6 bar. In each experiment, equilibrium solubilities of naphthalene in toluene decrease by increasing the pressure due to adding the carbon dioxide as the anti-solvent. Also, the obtained experimental data have correlated by the Soave-Redlich-Kwong equation of states along with Van der Waals 1 and 2 mixing rules.The adjustable parameters of mentioned models are obtained using the experimental data and reported along with average absolute relative deviation of each model. The results show that SRK equation of state with vdW2 mixing rule (AARD = 11.75 %) has less deviation than SRK-vdW1 (AARD =14.41 %) and optimum operational condition for production of fine particles (over than 90%) in the GAS process has been suggested.
https://www.nsmsi.ir/article_19877_a66283ed839475ef10044aa1d9c87c20.pdf
2016-12-01
59
67
Phase equilibrium
Carbon dioxide
Solubility
Equation of state
Hasan
Pahlavanzadeh
pahlavzh@modares.ac.ir
1
Department of Chemical Engineering, Tarbiat Modares University, Tehran, I.R. IRAN
LEAD_AUTHOR
Habib Allah
Shirazizadeh
2
Department of Chemical Engineering, Tarbiat Modares University, Tehran, I.R. IRAN
AUTHOR
[1] Chattopadhyay P., Gupta R. B., Production of Griseofulvin Nanoparticles Using Supercritical CO2 as Antisolvent with Enhanced Mass Transfer, Ind. Eng. Chem. Res., 40:3530-3539 (2001).
1
[2] Cocero M.J., Ferrero S., Crystallization of β-carotene by a GAS Process in Batch: Effect of Operating Conditions, J. Supercrit. Fluids, 22: 237-245 (2002).
2
[3] Kalogiannis C.G., Eleni P., Panayiotou C.G., Production of Amoxicillin Microparticles by Supercritical Antisolvent Precipitation, Ind. Eng. Chem. Res., 44: 9339-9346 (2005).
3
[4] Nemati lay E., Taghikhani V. and Ghotbi C., Measurement and Correlation of CO2 Solubility
4
in the Systems of CO2+ Toluene, CO2+ Benzene, and CO2 + n-Hexane at Near-Critical and Supercritical Conditions, J. Chem. Eng. Data., 51: 2197-2200 (2006).
5
[5] Dixon D.J., Johnston K.P., Molecular Thermodynamics of Solubilities in Gas Antisolvent Crystallization, AIChE journal., 37(10): 1441-1449 (1991).
6
[6] Breure B., Kordikowski A., Wilmes B., Peters C.J., Measurements of the Phase Behavior of Ternary Systems of Interest to the GAS Process: III. The System CO2+ Toluene + Naphthalene, Journal of Supercritical Fluids, 76: 10-16 (2013).
7
[7] Kikic I., De Zordi N., Moneghini M., Solinas D., Solubility Estimation of Drugs in Ternary Systems of Interest for the Antisolvent Precipitation Processes, Journal of Supercritical Fluids, 55: 616-622 (2010).
8
[8] Courtney A., Stephen O., Montgomery E., Gupta R.B., Formation of Itraconazole/ L-Malic Acid Cocrystals by Gas Antisolvent Cocrystallization, Journal of powder thechnology, 236: 122-131 (2013).
9
[9] Liu Z., Wang J., Song L., Yang G., Han B., Study on the Phase Behavior of Cholesterol-Acetone- CO2 System and Recrystallization of Cholesterol by Antisolvent CO2, Journal of Supercritical Fluids, 24: 1-6 (2002).
10
[10] Soave. G., Equilibrium Constants From a Modified Redlich- Kwong Equation of State, Chem. Eng. Sci., 27:1197-1203 (1972).
11
[11] Prausnitz J.M., Rüdiger N.L., Gomes de Azevedo E., "Molecular Thermodynamics of Fluid Phase Equilibria", 3 rd. ed, Prentice-Hall, (1999).
12
[12] Green D.W., Perry’s R. H. Chemical Engineers’ Handbook, 8th Edition, Nc Graw-hill, New York, USA, (2008).
13
]13[ پهلوانزاده، حسن؛ بخشی زرین آبادی، حمید؛ اندازه گیری و مدل سازی تعادل فازی سامانههای دو جزئی کربن دی اکسید ـ تولوئن و کربن دی اکسید ـ اتانول در فشارهای بالا برای تعیین شرایط بهینه تولید ریز ذرات جامد در فرایند گاز ـ ضد حلال، نشریه شیمی و مهندسی شیمی ایران، (4)30: 1 تا 8 (1390).
14
[14] De la Fuente J. C., Shariati A. and Peters C.J., On the Selection of Optimum Thermodynamic Conditions for the GAS Process, Journal of Supercritical Fluids, 32: 55-61 (2004).
15
ORIGINAL_ARTICLE
Investigation on Electro oxidation of Molybdenite Concentrate and Reduction in Energy Consumption
In this research, dissolution of molybdenite through electro-oxidation of molybdenite concentrate in alkaline electrolyte solution was investigated. Effect of various parameters, including operating potential, liquid to solid ratio, NaCl concentration and distance between electrodes on the dissolution of molybdenite and the consumed electric energy within the electrochemical cell was studied. The results show that, dissolution of molybdenite was increased by increasing operating potential, liquid to solid ratio and NaCl concentration. The same was increased by increasing the distance between electrodes up to 10 mm, while for further distances the latter decreased. The energy consumption increased by increasing operating potential, liquid to solid ratio, and the distance between electrodes. The consumed energy also decreased by increasing NaCl concentration up to 100 g/L, while for further salt concentrations the latter increased. At optimum conditions including operating potential of 3 V, liquid to solid ratio of 200 mL/g, NaCl concentration of 100 g/L, distance between electrodes of 10 mm, and a period of 4 hours operation, the efficiency of molybdenum recovery and energy consumption were 70.41% and 5.56 kWh, respectively, per kilogram of molybdenite concentrate.
https://www.nsmsi.ir/article_19878_998083715d378c109ffb3461d615f4c5.pdf
2016-12-01
69
76
molybdenum
Molybdenite concentrate
Electro oxidation
Consumed energy
electrolysis
Marzieh
Mahmoodi
m_mahmoodi94@yahoo.com
1
Research Lab for Advanced Separation Processes, Department of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16846-13114 Tehran, I.R. IRAN
AUTHOR
Seyed Nezamoldin
Ashrafizadeh
ashrafi@iust.ac.ir
2
Research Lab for Advanced Separation Processes, Department of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16846-13114 Tehran, I.R. IRAN
LEAD_AUTHOR
[1] Mounsey D.M., "Factors Influencing the Recovery of Molybdenum During the Hypochlorite Leaching of Low Grade Molybdenite-Copper Concentrates", PhD Diss., University of British Columbia, 1979.
1
[2] Henrie T., Lindstrom R., Scheiner B., "Electro-oxidative Method for the Recovery of Molybdenum from Sulfide Ores", U.S. Patent 3,849,265, Issued November 19, (1974).
2
[3] Cao Z.F., Zhong h., Liu G-Y, Fu J.G., Wen Z.Q., Wang Sh., Electric-Oxidation Extraction of Molybdenite Concentrate in Alkaline NaCl Electrolyte, Journal of Central South University of Technology, 17, 480-484 (2010).
3
[4] Cao Z.F., Zhong H., Qiu Z.H., Liu G.Y., Zhang W.X., A Novel Technology for Molybdenum Extraction from Molybdenite Concentrate, Hydrometallurgy, 99(1): 2-6 (2009).
4
[5] Darjaa T., Okabe T., Waseda Y., Umetsu Y., Electro-Oxidation of Molybdenum Concentrate in Sodium Chloride Solution, Shigen-to-Sozai, 115(10): 755-761 (1999).
5
[6] Ketcham, J., Enzo L. Coltrinari, Wayne W. Hazen. Pressure Oxidation Process for the Production of Molybdenum Trioxide from Molybdenite, U.S. Patent 6149883, Issued May 2, (1996).
6
[7] Ashraf M., Hydrometallurgical Recovery of Molybdenum from Egyptian Qattar Molybdenite Concentrate, Physicochem. Probl. Miner. Process, 47: 105-112 (2011).
7
[8] Youcai, Liu, Zhong Hong, Cao Zhanfang, Molybdenum Removal from Copper Ore Concentrate by Sodium Hypochlorite Leaching, Mining Science and Technology (China), 21(1): 61-64 (2011).
8
[9] Zamani Askari M.A., Hiroyoshi N., Tsunekawa M., Vaghar R., Oliazadeh M., Bioleaching of Sarcheshmeh Molybdenite Concentrate for Extraction of Rhenium, Hydrometallurgy, 80(1): 23-31 (2005).
9
[10] CAO, Zhan-fang, Hong Zhong, Zhen-qian WEN, Jian-gang FU, and Na Chen. Ultrasonic Electro-oxidation Process of Molybdenite Concentrate, The Chinese Journal of Process Engineering, 8(5): 926-931 (2008).
10
[11] Gupta C.K., "Extractive Metallurgy of Molybdenum", CRC Press, (1992).
11
[12] Cao, Zhan-fang, Hong Zhong, Guang-yi Liu, Yun-ren Qiu, Shuai Wang., Molybdenum Extraction from Molybdenite Concentrate in NaCl Electrolyte, Journal of the Taiwan Institute of Chemical Engineers, 41(3): 338-343 (2010).
12
[13] Zhan‐fang, Cao, Zhong Hong, Liu Guang‐yi, Fu Jian‐gang, Wang Shuai, and Qiu Yun‐ren. Electric‐Oxidation Kinetics of Molybdenite Concentrate in Acidic NaCl Solution, The Canadian Journal of Chemical Engineering, 87(6): 939-944 (2009).
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14
ORIGINAL_ARTICLE
Study of Effective Factors on Separation Efficiency of Vane Separator
Vane plates are considered as one of the most efficient devices in industry which are widely used to eliminate liquid droplets from gas flows. In this study, the two-phase flow of gas-liquid between the wavy plates of a type of vane separator was simulated using Computational Fluid Dynamics (CFD) technique and influences of three independent factors of inlet gas velocity, vane spacing and vane angle on the separation efficiency were investigated. To model the liquid-gas flow, Eurelian-Lagrangian approach was applied and separator efficiency was evaluated within a velocity range of 3-8m/s while mass fraction of liquid droplets in the gas flow was 0.089. The liquid film breakup phenomenon was considered in these simulations. Having compared simulation results with experimental data, we realized that there was an average error about 0.9% in simulations. Regarding the simulation results, vane separation efficiency depends on inlet gas velocity and geometrical parameters of the vanes.
https://www.nsmsi.ir/article_19879_2f76e425da652a4c60bb2822016797dc.pdf
2016-12-01
77
85
Vane plates
Separation efficiency
Eulerian-Lagrangian approach
Computational fluid dynamics
Vane tuning angle
Inlet gas velocity
Vane spacing
Elhameh
Narimani
1
Simulation and Control Research Laboratory, Department of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163 Tehran, I.R. IRAN
AUTHOR
Shahrokh
Shahhosseini
shahrokh@iust.ac.ir
2
Simulation and Control Research Laboratory, Department of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163 Tehran, I.R. IRAN
LEAD_AUTHOR
[1] Jia L., Suyi H., Xiamo W., Numerical Study of Steam - Water Separators with Wave-Type Vanes, Chin. J. Chem. Eng., 15(4):492-498 (2007)
1
[2] Brigadeau A., "Modeling and Numerical Investigation of High Pressure Gas-Liquid Separation", Ph.D. Thesis, Norwegian University of Science and Technology(2007).
2
[3] Josang A. I., "Numerical and Experimental Studies of Droplet Gas Flow", Ph.D. thesis, Dept. of Technology, Telemark University Collage (2002).
3
[4] Zhao J., Baosheng J., Zhong Z., Study of the Separation Efficiency of a Demister Vane with Response Surface Methodology, J. Hazard. Mater, 147(2): 363-369 (2007).
4
[5] Rahimi R., Abbaspour D., Determination of Pressure Drop in Mesh Mist Eliminator by CFD, Chem. Eng. Process, 47(10):1504-1508 (2007).
5
[6] Fluent document
6
[7] Galletti C., Brunazzi E., Tognotti L., A Numerical Model for Gas Flow and Droplet Motion in Wave-Plate Mist Eliminators with Drainage Channels, Chem. Eng. Sci., 63(23): 5639-5652 (2008).
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[9] Wang Y., James P.W., Calculation of Wave-Plate Demister Efficiencies Using Numerical Simulation of the Flow Field and Droplet Motion, Chem. Eng. Res.Design, 76(48): 980–985 (1998).
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[10] James P.W., Azzopardi B. J., Wang Y., Hughe J. P., A Model for Liquid Film Flow and Separation in a Wave-Plate Mist Eliminator, Chem. Eng. Res. Design, 83(5): 469-477 (2005).
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[11] Lim S., Zhou Q. L., Xu T.M., Hui S. E., A Study of the Type Selection of Mist Eliminators with the Help of P − v − dcr Method, J. Eng. Thermal Energy Power, 19: 575-578 (2004).
11
ORIGINAL_ARTICLE
Investigation on Acting Mechanism of Nitrogen Source in Culture on Medium pH and Production
of Poly-gamma-glutamate byFlavobacterium sp.
Poly-Gamma-glutamate, biopolymer polyamide is consisting of units glutamic acid, that due to biodegradability and non-toxicity property as a biological compound can be used in many fields such as medical and pharmaceutical, food, hydrogels, flocculants, moisture absorbers, thickener and drug carriers and anti-corrosion coatings. Therefore, have been done extensive studies to the over efficiency production of the biopolymer. That is why in this study was evaluated the effect of the concentration of nitrogen source as an important nutritional source on the pH and cell growth, then was studied in terms of how and through what mechanism the production of species flavobacterium gamma glutamate made an impact and Finally, in order to optimize the nitrogen source evaluated five different nitrogen source and sodium glutamate with the highest yields
https://www.nsmsi.ir/article_19880_641cb500c6c927fd5247e6d9519eb933.pdf
2016-12-01
87
96
Poly(gamma)glutamate
Flavobacterium sp
Nitrogen source
biopolymer
pH
Asma
Chegeni
asma_chegeni@yahoo.com
1
Institute of Biotechnology Science and Technology, Malek Ashtar University of Technology, Tehran, I.R. IRAN
AUTHOR
Ali
Bahrami
a_bahrami@mut.ac.ir
2
Institute of Biotechnology Science and Technology, Malek Ashtar University of Technology, Tehran, I.R. IRAN
LEAD_AUTHOR
Mojtaba
Khani
mj_khani67@yahoo.com
3
Institute of Biotechnology Science and Technology, Malek Ashtar University of Technology, Tehran, I.R. IRAN
AUTHOR
Mohammad Davood
Ghafar
4
Yong Researchers and Elites Club, North Tehran Branch, Islamic Azad University, Tehran, I.R. IRAN
AUTHOR
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11
[12] Sun K., Kasperski A., Tian Y., Chen L., Modelling of the Corynebacterium Glutamicum Biosynthesis Under Aerobic Fermentation Conditions, Chemical Engineering Science, 66: 4101-4110 (2011).
12
[13] Zhang H., Zhu J., Zhu X., Cai J., Zhang A., Hong Y., Huang J., Huang L., Xu Z., High-level Exogenous Glutamic Acid-Independent Production of Poly-(γ-glutamic acid) with Organic Acid Addition in A New Isolated Bacillus Subtilis C10, Bioresource Technology, 116: 241-246 (2012).
13
[14] Ghafari M., Bahrami A., Rasooli I., Arabian D., Ghafari F., Bacterial Exopolymeric Inhibition of Carbon Steel Corrosion, International Biodeterioration & Biodegradation, 80: 29-33 (2013).
14
[15] Khani M., Bahrami A., Ghafari M.D., Optimization of Operating Parameters for Anti-Corrosive Biopolymer Production by Chryseobacterium Indologenes MUT. 2 Using Central Composite Design Methodology, Journal of the Taiwan Institute of Chemical Engineers, (2015).
15
]16[ خوانچه زر سیروان, هاشمی نجف آبادی سمیره, محمدیان موسی آبادی جعفر, خلیل زاده رسول, اسفندیار سمانه، بهینه سازی شرایط کشت باکتری اشرشیا کولی برای اصلاح تولید قطعه C-D نوترکیب باکتریورودوپسین، نشریه شیمی و مهندسی شیمی ایران، (2)32: 93 تا 101 (1392).
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]17[ خواجوی رامین, مفتاحی امین, جهانگیریان اصفهانی ابراهیم, ستاری مرتضی، سنتز سلولز میکروبی از سویه بومی و بررسی شبکه نانو الیافی به دست آمده از ساکاریدهای گوناگون، نشریه شیمی و مهندسی شیمی ایران، (4 _ 3) 31 : 79 تا 93 (1391).
17
[18] Osman M., Eid M., Khattab O., Abd-El All S., El-Hallouty S., Mahmoud D., Optimization and Spectroscopic Characterization of the Biosynthesized Silver/Chitosan Nanocomposite from Aspergillus deflectus and Penicillium Pinophilum, Journal of Chemical, Biological and Physical Sciences (JCBPS), 5: 2643-2655 (2015).
18
[19] Li X., Gou X., Long D., Ji Z., Hu L., Xu D., Liu J., Chen Sh., Physiological and Metabolic Analysis of Nitrate Reduction on Poly-Gamma-Glutamic Acid Synthesis in Bacillus Licheniformis WX-02, Archives of microbiology, 196: 791-799 (2014).
19
[20] Mohajer D., Tayebee R., Influence of Nitrogen Bases on Epoxidation of Cyclooctene with Sodium Periodate Catalysed by Manganese (III) Porphyrins, Iran. J. Chem. Chem Eng. (IJCCE), 18(1): 27-29 (1999).
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[21] Kumar R., Vikramachakravarthi D., Pal P., Production and Purification of Glutamic Acid: A Critical Review Towards Process Intensification, Chemical Engineering and Processing: Process Intensification, 81: 59-71 (2014).
21
[22] Hosseini S.A., Yaghmaei S., Mousavi S.M., Jadidi A.R., Biodesulfurization of Dibenzothiophene by a Newly Isolated Thermophilic Bacteria Strain, Iran. J. Chem. Chem. Eng. (IJCCE), 25(3): 67-71 (2006).
22
[23] Kamali M., Ghorashi S.A.A., Asadollahi M.A., Controllable Synthesis of Silver Nanoparticles Using Citrate as Complexing Agent: Characterization of Nanopartciles and Effect of pH on Size and Crystallinity, Iran. J. Chem. Chem. Eng. (IJCCE), 31(4): 21-29 (2012).
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[24] Cromwick A.M., Birrer G.A., Gross R.A., Effects of pH and Aeration on γ‐poly (Glutamic Acid) Formation by Bacillus Licheniformis in Controlled Batch Fermentor Cultures, Biotechnology and Bioengineering, 50: 222-227 (1996).
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[25] Wu Q., Xu H., Ying H., Ouyang P., Kinetic Analysis and pH-Shift Control Strategy for Poly (γ-glutamic acid) Production with Bacillus Subtilis CGMCC 0833, Biochemical Engineering Journal, 50: 24-28 (2010).
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[27] Mitsunaga H., Meissner L., Palmen T., Bamba T., Büchs J., Fukusaki E., Metabolome Analysis Reveals the Effect of Carbon Catabolite Control on the Poly (γ-glutamic acid) Biosynthesis of Bacillus Licheniformis ATCC 9945, Journal of Bioscience and Bioengineering, 121(4): 413-419 (2016).
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34