CFD modeling of hydrogen separation through Pd-based membrane |
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| Affiliation: | 1. Mechanical Engineering Department, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi Arabia;2. King Abdulaziz City for Science and Technology (KACST), Carbon Capture and Sequestration Technology Innovation Center, KFUPM, Dhahran, 31261, Saudi Arabia;1. Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan;2. Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 701, Taiwan;3. Green Energy and Environmental Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan;1. Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran;2. Chemical Engineering Department, Faculty of Engineering, University of Zanjan, Zanjan, Iran;3. ITM-CNR, C/o University of Calabria, via P. Bucci Cubo 17/C, 87036 Rende, CS, Italy;1. Faculty of Chemical & Petroleum and Gas Engineering, Semnan University, Semnan, Iran;2. Chemical, Polymeric and Petrochemical Technology Development Research Division, Research Institute of Petroleum Industry (RIPI), P.O. Box: 14655-137, Tehran, Iran;1. Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran;2. School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Tehran, Iran;3. Chemical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran;4. ITM-CNR, C/o University of Calabria, Via P. Bucci Cubo 17/C, 87036 Rende CS, Italy |
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| Abstract: | Hydrogen separation through palladium-based membranes is one of the most promising technologies to produce H2 gas. The main purpose of this work is to comprehensively study the impact of different parameters on hydrogen diffusion flux (JH2) through a Pd–Ag membrane. The effect of implementing sweep gas on JH2 is investigated along with two methods of applying pressure difference, namely pressurized method, and vacuum method. Also, the effect of species mole fraction for three binary mixtures (H2/N2, H2/CO2, and H2/CO) is examined. A CFD model is developed and used to perform the study. Experimental data from the literature are used to validate the CFD model, and the results showed good agreement with the experimental data. The results revealed that implementing sweep-gas could significantly improve the hydrogen diffusion flux (by 25%) at the law-pressure difference. Moreover, it turns out that the vacuum method is more effective than the pressurized method, where it results in JH2 greater than the pressurized method by 15–36%. Furthermore, the CFD results showed that more hydrogen gas can be extracted from a binary mixture of H2/N2 (0.93 mol/m2.s) than of CO (0.90 mol/m2.s) and H2/CO2 (0.81 mol/m2.s). |
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| Keywords: | Hydrogen CFD Modeling Membrane Pd-based membrane |
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