Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Adsorption Properties of Nickel Using nZVI, D-nZVI and DiatomiteAdsorption Properties of Nickel Using nZVI, D-nZVI and Diatomite11118775FAAbdolrahim ForoutanMineral Processing Group, Faculty of Engineering, Tarbiat Modares University,
P.O. Box 14115-1111 Tehran, I.R. IRANAhmad Khodadadi DarbanMineral Processing Group, Faculty of Engineering, Tarbiat Modares University,
P.O. Box 14115-1111 Tehran, I.R. IRANRasoul Sarraf MamouriNano Materials Department, Faculty of Engineerin, Tarbiat Modares University,
P.O. Box 14115-143 Tehran, I.R. IRANYaser KianiniaMineral Processing Group, Faculty of Engineering, Tarbiat Modares University,
P.O. Box 14115-1111 Tehran, I.R. IRANBorhan MoghadamMineral Processing Group, Faculty of Engineering, Tarbiat Modares University,
P.O. Box 14115-1111 Tehran, I.R. IRANJournal Article20120527<em>In recent years, nano Zero valent iron (nZVI) have been used to remediate from polluted groundwater. However the application of nZVI has limitations such as particles agglomeration and filtration of nano particles. This research has been conducted to enhance the usability of nZVI by supporting with diatomite during synthesis. The characterization for nZVI particle and dolomite supported (D-nZVI) was performed using </em><em>XRD, SEM/EDAX, TEM, and BET-N<sub>2</sub>.</em><em>nZVI, D-nZVI and pure diatomite are used as adsorbents and nickel solution were applied as heavy metal adsorbents </em><em>to remove the aqueous Ni<sup>2+</sup> ions and varying factors including adsorbent dosage, solution pH, contact time,</em><em> and initial metal concentration have been investigated. The Langmuir and Freundlich adsorption </em><em>isotherm models over a wide initial concentration dosages were used in order to determine the adsorbents</em><em> adsorption capacity that results showed that D-nZVI has a higher adsorption capacity, and Also fitting the data using these models showed that the adsorption of all adsorbents are in good agreement with </em><em>the Langmuir model. The adsorption capacity of the above adsorbents were found, 66.67, 166.67, 13.16 mg/g,</em><em> respectively .The removal kinetics were modeled by pseudo first-order and pseudo second-order models and the results showed that removal of Ni<sup>2+</sup> by all adsorbents could be better expressed by pseudo second-order kinetics.</em><em>In recent years, nano Zero valent iron (nZVI) have been used to remediate from polluted groundwater. However the application of nZVI has limitations such as particles agglomeration and filtration of nano particles. This research has been conducted to enhance the usability of nZVI by supporting with diatomite during synthesis. The characterization for nZVI particle and dolomite supported (D-nZVI) was performed using </em><em>XRD, SEM/EDAX, TEM, and BET-N<sub>2</sub>.</em><em>nZVI, D-nZVI and pure diatomite are used as adsorbents and nickel solution were applied as heavy metal adsorbents </em><em>to remove the aqueous Ni<sup>2+</sup> ions and varying factors including adsorbent dosage, solution pH, contact time,</em><em> and initial metal concentration have been investigated. The Langmuir and Freundlich adsorption </em><em>isotherm models over a wide initial concentration dosages were used in order to determine the adsorbents</em><em> adsorption capacity that results showed that D-nZVI has a higher adsorption capacity, and Also fitting the data using these models showed that the adsorption of all adsorbents are in good agreement with </em><em>the Langmuir model. The adsorption capacity of the above adsorbents were found, 66.67, 166.67, 13.16 mg/g,</em><em> respectively .The removal kinetics were modeled by pseudo first-order and pseudo second-order models and the results showed that removal of Ni<sup>2+</sup> by all adsorbents could be better expressed by pseudo second-order kinetics.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Synthesis and Characterization of V-SBA-16 Nanoporous and Its Application as a Catalyst for Direct Hydroxylation
of Benzene to PhenolSynthesis and Characterization of V-SBA-16 Nanoporous and Its Application as a Catalyst for Direct Hydroxylation
of Benzene to Phenol132018776FAMilad JourshabaniSchool of Chemistry, College of Science, University of Tehran, Tehran, I.R. IRANAlireza BadieiSchool of Chemistry, College of Science, University of Tehran, Tehran, I.R. IRANNegar LashgariSchool of Chemistry, College of Science, University of Tehran, Tehran, I.R. IRANGhodsi Mohammadi ZiaraniDepartment of Chemistry, Alzahra University, Tehran, I.R. IRANJournal Article20150502<em>In this research, a V-SBA-16 catalyst was prepared using SBA-16 nanoporous material as a support and vanadium complex via a reflux method (V-SBA-16). The catalyst was characterized using N<sub>2</sub> adsorption–desorption isotherms, X-Ray Diffraction (XRD), Ultraviolet-visible spectroscopy, and transmission electron microscopy. Characterization results showed that the ordered nanoporous structure of the support was retained during the catalyst preparation and did not collapse. The efficiency of catalyst was evaluated for direct oxidation of benzene to phenol at different reaction temperatures (25, 60 and 90 °C). The higher yield and selectivity toward phenol were obtained of 16% and 60%, respectively, at 60 °C.</em><em>In this research, a V-SBA-16 catalyst was prepared using SBA-16 nanoporous material as a support and vanadium complex via a reflux method (V-SBA-16). The catalyst was characterized using N<sub>2</sub> adsorption–desorption isotherms, X-Ray Diffraction (XRD), Ultraviolet-visible spectroscopy, and transmission electron microscopy. Characterization results showed that the ordered nanoporous structure of the support was retained during the catalyst preparation and did not collapse. The efficiency of catalyst was evaluated for direct oxidation of benzene to phenol at different reaction temperatures (25, 60 and 90 °C). The higher yield and selectivity toward phenol were obtained of 16% and 60%, respectively, at 60 °C.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Optimization of Cathode Catalyst Layer in PEM Fuel CellsOptimization of Cathode Catalyst Layer in PEM Fuel Cells213018778FAEmad KooshkiSchool of Chemical Engineering, Iran University of Science and Technology,
P.O. Box 16846-13114 Tehran, I.R. IRANSoosan RowshanzamirFuel Cell Laboratory, Green Research Center, Iran University of Science and Technology,
P.O. Box 16846-13114 Tehran, I.R. IRANJournal Article20120527<em>Thesluggish of Oxygen Reduction Reaction (ORR) kinetics at the cathode account </em><em>the majority of the voltage drop in H<sub>2</sub>-PEMFCs. As many limiting processes take place in the reaction</em><em> layer, it is important to model this layer. In this work, a two-dimensional steady state model for a PEM fuel cell cathode is described. All the components in the cathode such as the gas manifold, diffusion layer, micro-porous layer and the catalyst layer were modeled. Concentrations of gaseous components, liquid water saturation in the cathode catalyst layer and ionomer local potential calculated to solve the equations in MATLAB. After comparing the results of the model and experimental data, the design parameters include platinum loading, catalyst layer thickness and ionomer weight fraction was chosen to achieve maximum current density. The optimal values were 0.9 mg.cm<sup>-2</sup>, 15 µm and 55% for platinum loading, catalyst layer thickness and ionomer weight fraction at high voltage and 0.5 mg.cm<sup>-2</sup>, 30 µm and 45% at low voltage respectively.</em><em>Thesluggish of Oxygen Reduction Reaction (ORR) kinetics at the cathode account </em><em>the majority of the voltage drop in H<sub>2</sub>-PEMFCs. As many limiting processes take place in the reaction</em><em> layer, it is important to model this layer. In this work, a two-dimensional steady state model for a PEM fuel cell cathode is described. All the components in the cathode such as the gas manifold, diffusion layer, micro-porous layer and the catalyst layer were modeled. Concentrations of gaseous components, liquid water saturation in the cathode catalyst layer and ionomer local potential calculated to solve the equations in MATLAB. After comparing the results of the model and experimental data, the design parameters include platinum loading, catalyst layer thickness and ionomer weight fraction was chosen to achieve maximum current density. The optimal values were 0.9 mg.cm<sup>-2</sup>, 15 µm and 55% for platinum loading, catalyst layer thickness and ionomer weight fraction at high voltage and 0.5 mg.cm<sup>-2</sup>, 30 µm and 45% at low voltage respectively.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Measurements of Benzoic Acid Diffusivity in γ-Al2O3-Water Nanofluids at Constant TemperatureMeasurements of Benzoic Acid Diffusivity in γ-Al2O3-Water Nanofluids at Constant Temperature313918781FAManochehr Manochehrian FardDepartment of Chemical Engineering, Quchan University of Advanced Technology,
P.O. Box 67335-94771 Quchan, I.R. IRANHossein BeikiDepartment of Chemical Engineering, Quchan University of Advanced Technology,
P.O. Box 67335-94771 Quchan, I.R. IRANJournal Article20150129<em>In this experimental study, molecular diffusion coefficient of benzoic acid in aqueous base γ-Al<sub>2</sub>O<sub>3</sub>-Water nanofluids was measured by using very simple and inexpensive method. Nanofluids consisted of γ-Al<sub>2</sub>O<sub>3 </sub>nanoparticles which were suspended in deionized water as based fluid. Nanoparticles diameters were from 10 nm to 20 nm. The volumes ratios of nanoparticles have been used in experiments were 0.025% 0.05%, 0.1%, 0.2%, 0.4% and 0.8%. All of the experiments were performed at constant temperature in 20 <sup>o</sup>C. The results revealed that addition of γ-Al<sub>2</sub>O<sub>3</sub> nanoparticles to the based fluid did not have a significant effect on Benzoic acid diffusion in nanofluids.</em><em>In this experimental study, molecular diffusion coefficient of benzoic acid in aqueous base γ-Al<sub>2</sub>O<sub>3</sub>-Water nanofluids was measured by using very simple and inexpensive method. Nanofluids consisted of γ-Al<sub>2</sub>O<sub>3 </sub>nanoparticles which were suspended in deionized water as based fluid. Nanoparticles diameters were from 10 nm to 20 nm. The volumes ratios of nanoparticles have been used in experiments were 0.025% 0.05%, 0.1%, 0.2%, 0.4% and 0.8%. All of the experiments were performed at constant temperature in 20 <sup>o</sup>C. The results revealed that addition of γ-Al<sub>2</sub>O<sub>3</sub> nanoparticles to the based fluid did not have a significant effect on Benzoic acid diffusion in nanofluids.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Comparative Study of Kinetics and Isotherms of Biosorption of Nickel by Bacteria and, Red and Brown AlgaeComparative Study of Kinetics and Isotherms of Biosorption of Nickel by Bacteria and, Red and Brown Algae414818782FASalman Ahmady AsbchinDepartment of Molecular and Cell Biology, Faculty of Basic Sciences, University of Mazandaran, Mazandaran, Babolsar, I.R. IRAN0000-0001-6079-1842Journal Article20140620<em>Biological</em><em> uptake of heavy metals is a very effective process for removing these pollutants from aqueous solutions is considered.</em><em>Algae</em><em> cell wall composition of cellulose and other materials such as agar, alginate and the metal ions play a key role in biosorption. Algae are of particular importance due to their low cost.</em><em> Mechanisms are involved in the uptake of metals by bacteria is very complex and depends on physicochemical reactions of metal ions in solution, and so are the locations of cellular uptake. </em><em>Microorganisms and</em><em> algae contribute to the cycle of inorganic substances in nature.</em><em>In</em><em> this study the biological uptake of nickel by </em><em>red algae Gracilaria</em><em>, brown algae Cystoseira, Fucus and Gram-positive bacteria Bacillus</em><em>, was studied.</em><em>Parameters</em><em> such as metal concentrations, pH, amount of algae, kinetic, and isotherms were studied in this experiment.</em><em> The maximum rates of metal uptake by algae Gracilaria, Cystoseira and Bacillus at pH=6</em><em> and Fucus on the pH is about 5. The maximum nickel sorption was attained about for Fucus, Gracilaria, Cystoseira, and Bacillus, 0.94, 0.68, 0.34 and 0.65 mg/L respectively. This study has shown nickel (II) uptakes, equilibrium time of about 400,350,300 and 120 minutes for, Gracilaria, Cystoseira, Fucus and Bacillus, respectively, and the adsorption equilibrium date was well described by Langmuir equation.</em><em>Biological</em><em> uptake of heavy metals is a very effective process for removing these pollutants from aqueous solutions is considered.</em><em>Algae</em><em> cell wall composition of cellulose and other materials such as agar, alginate and the metal ions play a key role in biosorption. Algae are of particular importance due to their low cost.</em><em> Mechanisms are involved in the uptake of metals by bacteria is very complex and depends on physicochemical reactions of metal ions in solution, and so are the locations of cellular uptake. </em><em>Microorganisms and</em><em> algae contribute to the cycle of inorganic substances in nature.</em><em>In</em><em> this study the biological uptake of nickel by </em><em>red algae Gracilaria</em><em>, brown algae Cystoseira, Fucus and Gram-positive bacteria Bacillus</em><em>, was studied.</em><em>Parameters</em><em> such as metal concentrations, pH, amount of algae, kinetic, and isotherms were studied in this experiment.</em><em> The maximum rates of metal uptake by algae Gracilaria, Cystoseira and Bacillus at pH=6</em><em> and Fucus on the pH is about 5. The maximum nickel sorption was attained about for Fucus, Gracilaria, Cystoseira, and Bacillus, 0.94, 0.68, 0.34 and 0.65 mg/L respectively. This study has shown nickel (II) uptakes, equilibrium time of about 400,350,300 and 120 minutes for, Gracilaria, Cystoseira, Fucus and Bacillus, respectively, and the adsorption equilibrium date was well described by Langmuir equation.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Biological Pretreatment of Refractory Gold Ore by the Fungus, Phanerochaete ChrysosporiumBiological Pretreatment of Refractory Gold Ore by the Fungus, Phanerochaete Chrysosporium495918783FAAli Abdollah Najaf AbadiDepartment of Mining Engineering, Faculty of Engineering, Tarbiat Modares University,
P.O. Box 14115-1111 Tehran, I.R. IRANMahmoud AbdollahiDepartment of Mining Engineering, Faculty of Engineering, Tarbiat Modares University,
P.O. Box 14115-1111 Tehran, I.R. IRANAhmad Khodadadi DarbanDepartment of Mining Engineering, Faculty of Engineering, Tarbiat Modares University,
P.O. Box 14115-1111 Tehran, I.R. IRANSeyed Mohammad Mosavi BefroueiDepartment of Chemical Engineering, Tarbiat Modares University, Tehran, Tehran, I.R. IRANJournal Article20150528<em>In this research, fungus </em>Phanerochaete chrysosporium<em> has been used to effectively reduce the gold adsorption ability of carbonaceous matter on one hand, and decompose metal sulfides on the other, to ultimately enhance the gold extraction. Two ranks of coal (ordinary and anthracite) were used as substitutes to investigate the ability of fungus to reduce the gold adsorption by carbonaceous matter. The results showed that the ability of anthracite coal in gold adsorbing is 5 times more than ability of ordinary one. </em>Phanerochaete chrysosporium<em> reduced the ability of anthracite by over 85% for a 21 days culturing period under processing in PBD (Potato Dextrose Broth) medium and 95% for the same period in MWB (Millet and Wheat Bran) medium. </em>Phanerochaete chrysosporium<em> has also ability to oxidize the sulfide existing in refractory gold ores. The pyrite initial weight decreased by 35% for pH equal 7 and 30% for pH equal 4 in 21 days of processing. Pretreatment was performed for Zarshouran refractory gold ore with different percentage of orpiment and gold. After a 14 days of processing, the amount of gold extraction by cyanidation of samples (1) (-2210</em><em> µm</em><em> fraction containing less orpiment than natural samples),(2) (similar to natural samples from the amount of orpiment point of view), and (3) (+2210</em><em> µm</em><em> fraction</em><em> containing enriched over 85% orpiment) increased to 30%, 25% and 1% respectively and sulfide mineral existing in samples (1) and (2) both decreased by over 50%. According to the results, </em>Phanerochaete chrysosporium<em> is a microorganism with high potential for oxidizing the sulfide minerals and neutralizing the carbonaceous matter existing in refractory gold ore simultaneously and totally, it has a high potential for increasing the gold recovery in cyanidation of refractory gold ore.</em><em>In this research, fungus </em>Phanerochaete chrysosporium<em> has been used to effectively reduce the gold adsorption ability of carbonaceous matter on one hand, and decompose metal sulfides on the other, to ultimately enhance the gold extraction. Two ranks of coal (ordinary and anthracite) were used as substitutes to investigate the ability of fungus to reduce the gold adsorption by carbonaceous matter. The results showed that the ability of anthracite coal in gold adsorbing is 5 times more than ability of ordinary one. </em>Phanerochaete chrysosporium<em> reduced the ability of anthracite by over 85% for a 21 days culturing period under processing in PBD (Potato Dextrose Broth) medium and 95% for the same period in MWB (Millet and Wheat Bran) medium. </em>Phanerochaete chrysosporium<em> has also ability to oxidize the sulfide existing in refractory gold ores. The pyrite initial weight decreased by 35% for pH equal 7 and 30% for pH equal 4 in 21 days of processing. Pretreatment was performed for Zarshouran refractory gold ore with different percentage of orpiment and gold. After a 14 days of processing, the amount of gold extraction by cyanidation of samples (1) (-2210</em><em> µm</em><em> fraction containing less orpiment than natural samples),(2) (similar to natural samples from the amount of orpiment point of view), and (3) (+2210</em><em> µm</em><em> fraction</em><em> containing enriched over 85% orpiment) increased to 30%, 25% and 1% respectively and sulfide mineral existing in samples (1) and (2) both decreased by over 50%. According to the results, </em>Phanerochaete chrysosporium<em> is a microorganism with high potential for oxidizing the sulfide minerals and neutralizing the carbonaceous matter existing in refractory gold ore simultaneously and totally, it has a high potential for increasing the gold recovery in cyanidation of refractory gold ore.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Selection of Flotation reagents for Separation of Pyrolusite from CalciteSelection of Flotation reagents for Separation of Pyrolusite from Calcite617118788FAShima RahimiDepartment of Mining and Metallurgical Eng., Amirkabir University of Technology, Tehran, I.R. IRANMehdi IrannajadDepartment of Mining and Metallurgical Eng., Amirkabir University of Technology, Tehran, I.R. IRAN0000-0002-5469-084XAkbar MehdiloDepartment of Mining and Metallurgical Eng., Amirkabir University of Technology, Tehran, I.R. IRANJournal Article20150617<em>The flotation behavior of pyrolusite and calcite was investigated using oleic acid as an anionic collector and dodecylamine as a cationic collector. The results showed that using oleic acid the maximum flotation recovery of pyrolusite occurs at pH=9 due to the chemisorptions of oleate ions, while in the cationic flotation the physisorption of dodecylamine results in a maxima at pH=8. It was found that in the anionic flotation, copper sulfate (CuSO<sub>4</sub>.5H<sub>2</sub>O) acts as pyrolusite activator and calcite depressant agent. The best results were obtained using 1000 g/t copper sulfate in the presence of 10<sup>-4</sup> M oleic acid at pH=8. At these conditions the flotation recovery of pyrolusite and calcite are 83.6% and 38%, respectively. In the cationic flotation, sodium carbonate and calcium chloride depress the calcite flotation significantly. Using 10<sup>-4</sup> M sodium carbonate without a significant decrease in pyrolusite floatability the calcite flotation recovery reduces to 13.7 % at a pH of 7.5. At this pH, the use of 5×10<sup>-4 </sup>M calcium chloride with a slight decrease in pyrolusite floatability decreases the calcite flotation recovery from 57.2% to 10.8%. Thus, the cationic flotation using sodium carbonate as a depressant agent for calcite is suggested for separation of pyrolusite from calcite.</em><em>The flotation behavior of pyrolusite and calcite was investigated using oleic acid as an anionic collector and dodecylamine as a cationic collector. The results showed that using oleic acid the maximum flotation recovery of pyrolusite occurs at pH=9 due to the chemisorptions of oleate ions, while in the cationic flotation the physisorption of dodecylamine results in a maxima at pH=8. It was found that in the anionic flotation, copper sulfate (CuSO<sub>4</sub>.5H<sub>2</sub>O) acts as pyrolusite activator and calcite depressant agent. The best results were obtained using 1000 g/t copper sulfate in the presence of 10<sup>-4</sup> M oleic acid at pH=8. At these conditions the flotation recovery of pyrolusite and calcite are 83.6% and 38%, respectively. In the cationic flotation, sodium carbonate and calcium chloride depress the calcite flotation significantly. Using 10<sup>-4</sup> M sodium carbonate without a significant decrease in pyrolusite floatability the calcite flotation recovery reduces to 13.7 % at a pH of 7.5. At this pH, the use of 5×10<sup>-4 </sup>M calcium chloride with a slight decrease in pyrolusite floatability decreases the calcite flotation recovery from 57.2% to 10.8%. Thus, the cationic flotation using sodium carbonate as a depressant agent for calcite is suggested for separation of pyrolusite from calcite.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Investigation of the Properties of Drilling Fluid Modified by Barite/Polyacrylamide NanocompositeInvestigation of the Properties of Drilling Fluid Modified by Barite/Polyacrylamide Nanocomposite738118792FASamad SabbaghiNano-Chemical Engineering Department, Faculty of Advanced Technology, Shiraz University, Shiraz, I.R. IRANPuriya RoodbariNano-Chemical Engineering Department, Faculty of Advanced Technology, International Division ,
Shiraz University, Shiraz, I.R. IRANMehran Sadeghalvaad,Nano-Chemical Engineering Department, Faculty of Advanced Technology,Shiraz University, Shiraz, I.R. IRANJournal Article20141201<em>Drilling mud plays an important role in drilling operations which affects both the quality of drilled well and efficiency of drilling operations. In this study, the effect of polyacrylamide and Barite/polyacrylamide nanocomposite additives has been investigated on the properties of drilling mud. The nanocomposite was produced through the solution polymerization method. The produced nanocomposite was added to the water based drilling mud (350 mL water with 10 g of bentonite) and its main properties including viscosity, fluid loss (invasion), and mud cake thickness were examined. Results showed that, adding nanocomposite caused reduction of fluid loss, decrease in mud cake thickness and increase in the viscosity of drilling fluid.</em><em>Drilling mud plays an important role in drilling operations which affects both the quality of drilled well and efficiency of drilling operations. In this study, the effect of polyacrylamide and Barite/polyacrylamide nanocomposite additives has been investigated on the properties of drilling mud. The nanocomposite was produced through the solution polymerization method. The produced nanocomposite was added to the water based drilling mud (350 mL water with 10 g of bentonite) and its main properties including viscosity, fluid loss (invasion), and mud cake thickness were examined. Results showed that, adding nanocomposite caused reduction of fluid loss, decrease in mud cake thickness and increase in the viscosity of drilling fluid.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Effect of Nano Fluids on Thermal Properties of Thrmosyphon ReboilersEffect of Nano Fluids on Thermal Properties of Thrmosyphon Reboilers838918793FAAdineh KazemiChemical Engineering Department, Engineering Faculty, Science and Research Branch, Islamic Azad University, P.O. Box 14515-775 Tehran, I.R. IRANMohammad Reza Jafari NasrResearch Institute of Petroleum Industrys (RIPI), Tehran, I.R. IRANJournal Article20141122<em>In this paper the effect of nanofluids in a thermosiphon reboiler has been studied and simulate a thermosiphon available in the university of Manchester with the HTRI software package. It is revealed that how the performance and subcool length were influenced by using nanofluid applications. The result of this simulation shows the heat transfer coefficient increases by the increase of nanofluid concentration which leads to a decrease in heat transfer area and smaller equipment in its design. The subcool length is also decreased.</em><em>In this paper the effect of nanofluids in a thermosiphon reboiler has been studied and simulate a thermosiphon available in the university of Manchester with the HTRI software package. It is revealed that how the performance and subcool length were influenced by using nanofluid applications. The result of this simulation shows the heat transfer coefficient increases by the increase of nanofluid concentration which leads to a decrease in heat transfer area and smaller equipment in its design. The subcool length is also decreased.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRNashrieh Shimi va Mohandesi Shimi Iran1022-776834320151023Performance Evaluation of the Hybrid System of Domestic Solar Water Heater /Desalination SystemPerformance Evaluation of the Hybrid System of Domestic Solar Water Heater /Desalination System9110218794FAMohammad ZamenIranian Research and Development Center for Chemical Industries (IRDCI)-ACECR, Karaj, I.R. IRANNaser RezakhaniIranian Research and Development Center for Chemical Industries (IRDCI)-ACECR, Karaj, I.R. IRANMahdieh RejabiIranian Research and Development Center for Chemical Industries (IRDCI)-ACECR, Karaj, I.R. IRANMir Ali Asghar Zeinali DanalooIranian Research and Development Center for Chemical Industries (IRDCI)-ACECR, Karaj, I.R. IRANJournal Article20140426<em>The use of desalination is one of the ways to deal with the water crisis. Humidification-Dehumidification ( HD) of air process is one of the small scale desalination method witch is in the special attention nowadays. In this paper a new design for hybrid domestic solar water heater/ desalination unit is presented. That designed to supply drinking water and hot water for a domestic user in remote and desert areas. After reviewing various combinations of these two devices and choosing the best option, the hybrid system was constructed in Iranian Research and Development Center for Chemical Industries (IRDCI). The necessary tests were carried out and various parameters which are affecting the performance of unit such as water flow rate of the condenser, water temperature interval and solar radiation were tested. By using four solar collector with 8 m<sup>2</sup> surface area, this device be able to produce about 20 liters of fresh water and at least 250 liters of hot water. Since output of the brackish water is used as hot water, it reduces the waste water in desalination unit that may be result in zero discharge of waste water in some days. So in addition to providing heating by the use of solar energy, water saving will be accessible for the consumer.</em><em>The use of desalination is one of the ways to deal with the water crisis. Humidification-Dehumidification ( HD) of air process is one of the small scale desalination method witch is in the special attention nowadays. In this paper a new design for hybrid domestic solar water heater/ desalination unit is presented. That designed to supply drinking water and hot water for a domestic user in remote and desert areas. After reviewing various combinations of these two devices and choosing the best option, the hybrid system was constructed in Iranian Research and Development Center for Chemical Industries (IRDCI). The necessary tests were carried out and various parameters which are affecting the performance of unit such as water flow rate of the condenser, water temperature interval and solar radiation were tested. By using four solar collector with 8 m<sup>2</sup> surface area, this device be able to produce about 20 liters of fresh water and at least 250 liters of hot water. Since output of the brackish water is used as hot water, it reduces the waste water in desalination unit that may be result in zero discharge of waste water in some days. So in addition to providing heating by the use of solar energy, water saving will be accessible for the consumer.</em>