Hydrogen production from hydrogen sulfide using membrane reactor integrated with porous membrane having thermal and corrosion resistance |
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| Affiliation: | 1. Institute of Chemical Reaction Engineering, FAU Erlangen-Nuremberg, Erlangen, Germany;2. Institut für Anorganische und Physikalische Chemie, University Bremen, Bremen, Germany;1. School of Physics Science and Engineering, Tongji University, Shanghai, 200092, People''s Republic of China;2. National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, People''s Republic of China |
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| Abstract: | Using mathematical model and experimental method, the thermal decomposition of hydrogen sulfide in membrane reactor with porous membrane which has Knudsen diffusion characteristics was investigated. With mathematical model, the effect of characteristics of membrane reactor and operating conditions on H2 concentration in the permeate chamber, yH2, which increases at higher reaction temperature, lower pressure and higher ratio of cross-sectional area of the permeate chamber to that of the reactor, was evaluated. The reaction experiments with ZrO2–SiO2 porous membrane were carried out under the following conditions: temperature T, 923–1023 K; pressure in the reactor pRT, 0.11–0.25 MPa absolute; pressure in the permeate chamber pPT, 5 kPa absolute and inlet flow rate of H2S f0H2S, 3.2×10−5–1.5×10−4 mol/s. At pRT=0.11 MPa and f0H2S=6.4×10−5, yH2 increased from 0.02 at T=923 K to 0.15 at 1023 K. With the experimental condition, pRT=0.11, T=1023 K and f0H2S=3.2×10−5, yH2 was 0.22. The experimental results were compared with the results of the mathematical analysis. The agreement between both the results is found rather good at a lower reacting temperature, but not so good at a higher reacting temperature. |
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