High-purity hydrogen production via a water-gas-shift reaction in a palladium-copper catalytic membrane reactor integrated with pressure swing adsorption
| Autor: | Gina Bang, Kyung-Min Kim, Yun Jin Han, Chang Ha Lee, Jun Ho Kang, Dong Kyu Moon |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Hydrogen General Chemical Engineering chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering Water-gas shift reaction 0104 chemical sciences Catalysis Pressure swing adsorption chemistry.chemical_compound chemistry Chemical engineering medicine Environmental Chemistry 0210 nano-technology Hydrogen production Syngas Carbon monoxide Activated carbon medicine.drug |
| Zdroj: | Chemical Engineering Journal. 411:128473 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2021.128473 |
| Popis: | A Pd-Cu catalytic membrane reactor (CMR) integrated with pressure swing adsorption (PSA) was developed to produce fuel cell grade hydrogen from syngas. The enhanced water-gas-shift reaction in the Pd-Cu CMR packed with a high-temperature shift catalyst was experimentally conducted by using a carbon monoxide (CO)/hydrogen (H2)/carbon dioxide (CO2) mixture (65:30:5 vol%) at 360–380 °C, 6–10 bar, and a steam/carbon (s/c) ratio of 1–5. Since H2 was used as the sweeping gas, pure H2 could be directly obtained from the permeate side. The temperature inside the packed catalysts was well distributed in the developed CMR module without any specific hotspots during the reaction and separation. The CO conversion in the CMR increased from 85.4% to 94.8% with the recovery of 53.4% to 56.1% when the s/c ratio increased from 1 to 5. The conversion rate was enhanced by 10.0–16.7% compared with the fixed catalytic bed reactor. When four-bed PSA using activated carbon and zeolite was integrated to recover more H2 from the retentate flow, the recovery of H2 was additionally improved by 31.2–35.7%. The integrated Pd-Cu CMR with four-bed PSA could produce H2 of over 99.9991% with a recovery of 91.37% and 8.67 ppm CO. For H2 produced with less than 0.2 ppm CO, the recovery was reduced to 85.99% with 0.15 ppm CO. The feasibility of CMR with PSA to enhance CO conversion and H2 recovery is suggested for the production of fuel cell grade H2 for a proton-exchange membrane fuel cell (ISO 14687). |
| Databáze: | OpenAIRE |
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