Supporting the propane dehydrogenation reactors by hydrogen permselective membrane modules to produce ultra-pure hydrogen and increasing propane conversion: Process modeling and optimization |
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| Affiliation: | 1. Department of Chemical Engineering, Shiraz University, Shiraz 71345, Iran;2. Department of Chemical Engineering, Persian Gulf University, Bushehr 75169, Iran;3. Department of Chemical Engineering, Shiraz University of Technology, Shiraz 71555-313, Iran;1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, South Puzhu Road 30, Nanjing 211816, China;2. GaoQ Functional Materials Co., Ltd., Kechuang Avenue 9, Jiangbei New Area, Nanjing 211505, China;3. Sinopec Nanjing Chemical Research Institute Co., Ltd, Geguan Road 699, Nanjing 210048, China;1. Inorganic Membranes and Membrane Reactors, Sustainable Process Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, de Rondom 70, 5612 AP, Eindhoven, the Netherlands;2. Department of Environmental and Chemical Engineering (DIATIC), University of Calabria, Via P. Bucci, Cubo 44A, Rende, CS 87036, Italy;3. Dep. of Chemical, Energy and Mechanical Technology, Rey Juan Carlos University, C/ Tulipán s/n, 28933 Móstoles, Spain;1. Boreskov Institute of Catalysis SB RAS, 630090, Novosibirsk, pr. Ac. Lavrentieva, 5, Russia;2. National Research Tomsk Polytechnic University, 634050, Tomsk, Lenin av., 30, Russia;1. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 5 pr. Lavrentieva, Novosibirsk 630090, Russia;2. Novosibirsk State Technical University, 20 pr. Marksa, Novosibirsk 630073, Russia;1. SINTEF Materials and Chemistry, P.O. Box 124 Blindern, N-0314 Oslo, Norway;2. Energy Research Centre of the Netherlands (ECN), P.O. Box 1, 1755 ZG Petten, The Netherlands |
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| Abstract: | The main aim of this research is supporting the moving bed radial flow reactors in the propane dehydrogenation unit by membrane modules to produce ultra-pure hydrogen and increasing equilibrium conversion. The propane dehydrogenation is a thermodynamically limited and endothermic reaction, which decreasing hydrogen concentration and increasing operating temperature in the system could increase equilibrium conversion. In the first step, the conventional and membrane supported reactors are heterogeneously modeled based on the mass and energy conservation laws considering catalyst decay. To verify the precision of developed model, the results of simulation are compared with the available plant data. Then, the performance of designed membrane configuration is compared with the conventional process at the same feed condition. It appears that the activity of catalyst decreases along the reactors due to coke build up on the catalyst surface, and it results in the lower propane conversion. The results show that supporting the conventional reactors by hydrogen permselective membrane module increases propane conversion up to 3.09%. |
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| Keywords: | Propane dehydrogenation Radial flow reactor Membrane reactor Process modeling |
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