Three-dimensional numerical modeling on high pressure membrane reactors for high temperature water-gas shift reaction |
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| Authors: | RY Chein YC Chen YP Chyou JN Chung |
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| Affiliation: | 1. Dept. of Mechanical Engineering, National Chung Hsing University, Taichung 40227, Taiwan;2. Dept. of Energy Engineering, National United University, Miaoli 36003, Taiwan;3. Center of Environment and Energy, Institute of Nuclear Energy Research, Taoyuan 32546, Taiwan;4. Dept. of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611, USA |
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| Abstract: | This study presents a three-dimensional numerical model that simulates the H2 production from coal-derived syngas via a water-gas shift reaction in membrane reactors. The reactor was operated at a temperature of 900 °C, the typical syngas temperature at gasifier exit. The effects of membrane permeance, syngas composition, reactant residence time, sweep gas flow rate and steam-to-carbon (S/C) ratio on reactor performance were examined. Using CO conversion and H2 recovery to characterize the reactor performance, it was found that the reactor performance can be enhanced using higher sweep gas flow rate, membrane permeance and S/C ratio. However, CO conversion and H2 recovery limiting values were found when these parameters were further increased. The numerical results also indicated that the reactor performance degraded with increasing CO2 content in the syngas composition. |
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| Keywords: | Coal-derived syngas Water-gas shift reaction Membrane reactor CO conversion H2 recovery |
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