@article { author = {Moayeri, Mona and Kaflou, Ali and Sadeghi, Davood}, title = {Morphological and physical study of Cu-Ni sintered porous wicks used in heat pipes and fuel cells}, journal = {Hydrogen, Fuel Cell & Energy Storage}, volume = {3}, number = {4}, pages = {255-266}, year = {2017}, publisher = {Iranian Research Organization for Science and Technology (IROST)}, issn = {2980-8537}, eissn = {2980-8863}, doi = {10.22104/ijhfc.2017.481}, abstract = {Recently, the use of renewable energies has increased to  environmental pollution, limitation of fossil energy resources and energy security  One of the means that enable us to use such energies is fuel cells (FC). However, there are many problems  in the commercialization of FC from an economically and operation perspective. One of the most important problems is heat management. New heat pipes are being  developed for this purpose. A heat pipe is made from a “porous coat” on a base metal. In this study, a Cu-Ni porous layer with a thickness of ~300µm was considered as the coating on a Cu-Ni base metal with two kinds of powder (mixed and ball milled). The morphology and physical properties of the coatings, such as porosity, permeability and effective thermal conductivity, were investigated. The best permeability was obtained for the base metals coated with powder which was ball milled for 6 hours. Thermal conductivity of samples  increased (by 9.5%) when using ball milled powder. Porosity of coated samples   decreased with ball milled powder in comparison to mixed powder.}, keywords = {Copper-Nickel powder,Sintered porous wicks,Porosity,Permeability,heat Pipe & Fuel cell,Thermal Conductivity}, url = {https://hfe.irost.ir/article_481.html}, eprint = {https://hfe.irost.ir/article_481_38238271bcc9ffc5199f675a5eeb4fb6.pdf} } @article { author = {Ozgoli, Hassan Ali}, title = {Exergy Analysis of a Molten Carbonate Fuel Cell-Turbo Expander-Steam Turbine Hybrid Cycle}, journal = {Hydrogen, Fuel Cell & Energy Storage}, volume = {3}, number = {4}, pages = {267-279}, year = {2017}, publisher = {Iranian Research Organization for Science and Technology (IROST)}, issn = {2980-8537}, eissn = {2980-8863}, doi = {10.22104/ijhfc.2017.480}, abstract = {Exergy analysis of an integrated molten carbonate fuel cell-turbo expander-steam turbine hybrid cycle has been presented in this study. The proposed cycle has been used as a sustainable energy approach to provide a micro hybrid power plant with high exergy efficiency. To generate electricity by the mentioned system, an externally reformed molten carbonate fuel cell located upstream of the combined cycle has been used. Furthermore, the turbo expander and steam turbine systems have been considered as topping and bottoming cycles for the purpose of cogeneration, respectively. Results show that the proposed system is capable of reaching a net delivered power of 1125 kW, while the total exergy efficiency (including both electricity and heat) of this system is more than 68%. Moreover, the delivered power and exergy efficiency from the proposed cycle is stable against ambient temperature variations. In addition, the effect of a current density increase on cell voltage and total exergy destruction has been considered.}, keywords = {Molten Carbonate Fuel Cell,Turbo Expander,Steam Turbine,Exergy Efficiency,Hybrid Cycle}, url = {https://hfe.irost.ir/article_480.html}, eprint = {https://hfe.irost.ir/article_480_3c3cee6b30411bbf610d1d3666cdfa69.pdf} } @article { author = {Ebrahimi, Atiyeh and Najafpour, Ghasem and Kebria, Daryoush}, title = {Effect of batch vs. continuous mode of operation on microbial desalination cell performance treating municipal wastewater}, journal = {Hydrogen, Fuel Cell & Energy Storage}, volume = {3}, number = {4}, pages = {281-290}, year = {2016}, publisher = {Iranian Research Organization for Science and Technology (IROST)}, issn = {2980-8537}, eissn = {2980-8863}, doi = {10.22104/ijhfc.2016.473}, abstract = {Microbial desalination cells (MDCs) have  great potential as a cost-effective and green technology for simultaneous water desalination, organic matter removal and energy production. The aim of this study was to compare the performance of a MDC under batch and continuous feeding conditions. Hence, power and current output, coulombic efficiency, electron harvest rate, desalination rate and COD removal were calculated during the operation. According  to the obtained results, the MDC performance exhibited some changes when the reactor switched from batch to continuous mode. The continuously operated MDC indicated a maximum power density of 15.9 W.m-3 and an average salt removal rate of 80%. In comparison, the batch MDC demonstrated the maximum power density and average salt removal rate of 13.9 W.m-3 and 68.1%, respectively. In addition, 83.7% of COD was removed in the continuously fed MDC at a hydraulic retention time of two days, which was 13.8% more than amount of COD removed in MDC under a two days batch process. The obtained results revealed that enrichment of anolyte under controlled continuous feeding conditions would relatively improve the MDC performance. }, keywords = {Batch process,Continuous process,Microbial desalination cell,Wastewater treatment,Power density}, url = {https://hfe.irost.ir/article_473.html}, eprint = {https://hfe.irost.ir/article_473_b5cfb96e7785d0df55fcf0a6bd3905ba.pdf} } @article { author = {Ghafouri Roozbahani, Mohammad Ali and ziarati, mahmoud and Khandan, Nahid}, title = {Methanol steam reforming; Effects of various metal oxides on the properties of a Cu-based catalyst}, journal = {Hydrogen, Fuel Cell & Energy Storage}, volume = {3}, number = {4}, pages = {291-299}, year = {2016}, publisher = {Iranian Research Organization for Science and Technology (IROST)}, issn = {2980-8537}, eissn = {2980-8863}, doi = {10.22104/ijhfc.2016.474}, abstract = {Ternary Cu/ZnO/metal oxide catalysts are prepared through the co-precipitation method under strict control of parameters like pH, calcination conditions, and precipitation temperature in a systematic manner. The metal oxides applied in this study consist of Al2O3, ZrO2, La2O3 and Ce2O3. The distinction of this work in comparison with similar research is a comprehensive investigatation of the catalytic properties of metal oxides (including conversion, selectivity and stability) which have the potential for use in the methanol steam reforming process. The catalysts are characterized through XRD, SEM and BET. The prepared catalysts are applied in methanol steam reforming in a fixed bed reactor. A TGA analysis  performed for all four catalysts  determined that the Ce2O3 and ZrO2 metal oxide catalysts showed the best results in  terms of stability with a coke formation of 0.7wt% and 0.8wt%, respectively; and maximum surface area is related to Cu/ZnO/Ce2O3, which can result in excellent stability and Cu dispersion. Overall, the obtained results indicate that the ZrO2 metal oxide catalyst is the best candidate to be applied in methanol steam reforming due to its higher activity, selectivity and yield. The hydrogen selectivity and yield of Cu/ZnO/ZrO2 after 6 hours of experiment were 80.02% and 46.4%, respectively.}, keywords = {Methanol steam reforming,Hydrogen,Cu-based catalyst,Co- precipitation,Metal oxide}, url = {https://hfe.irost.ir/article_474.html}, eprint = {https://hfe.irost.ir/article_474_845df4e939554b100477579a83eb03ef.pdf} } @article { author = {Rajabinasab, Morteza and Ameri, Mehran and Iranmanesh, Masoud and Sadeghi, Saber}, title = {Effect of recycling solid oxide fuel cell products on the performance of a SOFC-Gas turbine hybrid system}, journal = {Hydrogen, Fuel Cell & Energy Storage}, volume = {3}, number = {4}, pages = {301-313}, year = {2016}, publisher = {Iranian Research Organization for Science and Technology (IROST)}, issn = {2980-8537}, eissn = {2980-8863}, doi = {10.22104/ijhfc.2016.486}, abstract = {In this study, the effect of recycling fuel cell products on the performance of a solid oxide fuel cell and gas turbine (SOFC-GT) hybrid system was investigated. Three types of products recycling are considered: cathode products recycling (CPR), anode products recycling (APR), and both cathode and anode products recycling (BACPR). In the present work,   operating temperature and  limiting current density was calculated from   governing equations by the trial and error method. Furthermore, the effect of pressure ratio and air utilization factor on the performance of the SOFC-GT hybrid system is considered. Results show that   CPR has more effect on the performance of hybrid systems than   APR. The total electrical efficiency of the hybrid system increases as the cathode recycle ratio (CRR) increases and decreases as the anode recycle ratio (ARR) decreases. In addition, results show that the hybrid system with BACPR can achieve a higher overall electrical efficiency of approximately 75%.}, keywords = {Hybrid system,Solid oxide fuel cell,Gas turbine,Cathode product recycling,Anode product recycling}, url = {https://hfe.irost.ir/article_486.html}, eprint = {https://hfe.irost.ir/article_486_c71d5390841a8c21c5ae3531ea79ee0c.pdf} } @article { author = {Amir, Elaheh and Rezaei, Mehran and Meshkani, Fereshteh}, title = {Investigation of the catalytic performance and coke formation of nanocrystalline Ni/SrO-Al2O3 catalyst in dry reforming of methane}, journal = {Hydrogen, Fuel Cell & Energy Storage}, volume = {3}, number = {4}, pages = {315-322}, year = {2017}, publisher = {Iranian Research Organization for Science and Technology (IROST)}, issn = {2980-8537}, eissn = {2980-8863}, doi = {10.22104/ijhfc.2017.488}, abstract = {In this study, nickel catalysts supported on mesoporous nanocrystalline gamma alumina promoted by various strontium contents were prepared by the impregnation method and employed in dry reforming of methane (DRM). The prepared catalysts were characterized using N2 adsorption (BET), temperature-programmed reduction and oxidation (TPR,) and oxidation (TPDTPO), X-ray diffraction (XRD), and scanning electron microscopy (SEM) techniques. TPR analysis revealed that the increases in Sr content enhanced the reducibility of the catalysts. The obtained results indicated that increasing Sr content increased both the methane and carbon dioxide conversions. In addition, the CO2 conversion was higher than the CH4 conversion due to the occurrence of the reverse water gas shift reaction. Among the studied catalysts, Ni/10% Sr-Al2O3 exhibited the highest catalytic activity and the lowest carbon formation. This catalyst showed high stability without any decrease in methane conversion up to 12 h of reaction. The results of this study could be employed in developing an industrial catalyst for the dry reforming reaction.}, keywords = {Nickel catalyst,Strontium,Dry reforming,Nanocrystalline}, url = {https://hfe.irost.ir/article_488.html}, eprint = {https://hfe.irost.ir/article_488_4bbd6c623be153ed1fa2287e22998ac0.pdf} }