To produce fuel-cell-grade hydrogen (H2) via fossil fuel reforming processes, an efficient H2 purification method with a carbon capture unit is necessary. In this study, a sorption-enhanced water-gas shift membrane reactor (SE-WGS-MR) system combining a state-of-the-art MgO-based catalyst, carbon dioxide sorbent, and Pd/Ta membrane is developed to simultaneously capture carbon dioxide and purify H2. With the optimal sorption-enhanced configuration (SE-WGS), the carbon monoxide conversion is significantly enhanced to 86.6%, compared with 68.5% using the commercial catalyst only. Coupling of the Pd/Ta membrane with the WGS catalyst (WGS-MR) enable over 95% H2 recovery, with the production of high-purity H2. Eventually, the ensemble of the three processes (SE-WGS-MR) afford 99.99% of carbon monoxide conversion and the extraction of high-purity H2 with 99.5% recovery. This study demonstrates the potential of the single process integrating the catalytic reaction, adsorptive separation, and membrane purification for the production of H2 with ultra-high purity and recovery.
|Journal||Cell Reports Physical Science|
|Publication status||Published - 2022 Aug 17|
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT ( 2019K1A4A7A03113187 ) and the Korea Institute of Science and Technology (KIST) Institutional Program ( 2E31872 ).
© 2022 The Author(s)
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Physics and Astronomy(all)