Generation and extraction of hydrogen from low-temperature water-gas-shift reaction by a ZIF-8-based membrane reactor
- Authors
- Yin, Hang; Shang, Jin; Choi, Jungkyu; Yip, Alex C. K.
- Issue Date
- 15-5월-2019
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- ZIF-8 membrane; Membrane reactor; Water-gas-shift reaction; Hydrogen production and purification
- Citation
- MICROPOROUS AND MESOPOROUS MATERIALS, v.280, pp.347 - 356
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROPOROUS AND MESOPOROUS MATERIALS
- Volume
- 280
- Start Page
- 347
- End Page
- 356
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/65411
- DOI
- 10.1016/j.micromeso.2019.02.030
- ISSN
- 1387-1811
- Abstract
- In this study, for the first time, a membrane reactor (MR) was constructed with a crystalline metal-organic framework (MOF) membrane and Cu/Zn/Al2O3 catalysts, and utilized for hydrogen production and purification through a low-temperature water gas shift reaction (LT-WGSR). Compared with the existing metal and zeolite membranes, the as-synthesized zeolitic imidazolate framework-8 (ZIF-8) membrane showed a pure hydrogen permeance of 9.2 x 10(-7) mol/m(2) s Pa, which is orders of magnitude higher than those of metal membranes, and a considerable H-2/CO ideal selectivity of 6.13 at room temperature without any post-treatment, making it a more practical option for producing hydrogen with a MR process from a WGSR from the perspectives of productivity and scalability. Significantly enhanced CO conversions and hydrogen purities were achieved when the LT-WGSR was conducted in this ZIF-8-based MR system compared to those achieved with traditional packed-bed reactors (PBRs) under the operating conditions of interest in the present study, i.e. temperature of 120-220 degrees C and space velocity of 20-80 L/g.h. An improvement of similar to 13.5% in the CO conversion was achieved with the MR at 220 degrees C and a space velocity of 80 L (STP)/g-cath, whereas a higher temperature and lower space velocity favoured a higher H-2 recovery. The feasibility of using this ZIF-8-based MR for long-term LT-WGSRs was assessed; the structural stability of the ZIF-8 membrane must be enhanced to achieve a ZIF-8-based MR in the future.
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Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
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