Increase in stability of BaCo/CeO2 catalyst by optimizing the loading amount of Ba promoter for high-temperature water-gas shift reaction using waste-derived synthesis gas
- Authors
- Lee, Yeol-Lim; Kim, Kyoung-Jin; Jang, Won-Jun; Shim, Jae-Oh; Jeon, Kyung-Won; Na, Hyun-Suk; Kim, Hak-Min; Bae, Jong Wook; Nam, Sung Chan; Jeon, Byong Hun; Roh, Hyun-Seog
- Issue Date
- Jan-2020
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Waste-derived synthesis gas; High-temperature water-gas shift; Ba promoter; Co/CeO2 catalyst; Stability
- Citation
- RENEWABLE ENERGY, v.145, pp.2715 - 2722
- Indexed
- SCIE
SCOPUS
- Journal Title
- RENEWABLE ENERGY
- Volume
- 145
- Start Page
- 2715
- End Page
- 2722
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/146334
- DOI
- 10.1016/j.renene.2019.08.050
- ISSN
- 0960-1481
- Abstract
- The loading amount of Ba promoter in the 15 wt% Co/CeO2 catalyst system was varied from 0 wt% to 3 wt %, and the resulting catalysts were used for the high-temperature water-gas shift (HTS) reaction. The catalysts were prepared by the incipient wetness co-impregnation method and studied through various characterization techniques such as X-ray diffraction, Brunauer-Emmet-Teller measurements, CO-chemisorption, H-2-temperature programmed reduction, X-ray photoelectron spectroscopy, and transmission electron microscopy. The doping of Ba as a promoter in the optimal amount (1-2 wt%) improves the reducibility of the catalyst and enhances its sintering resistance. However, the doping of an excessive amount (>= 3 wt%) of the promoter lowers the reducibility of the catalyst, resulting in the instability of the active phase (Co-0). Overall, the 1% BaCo/CeO2 catalyst exhibited the best performance even at a severe reaction condition (CO conc. = 38%, GHSV = 143,000 h(-1)) owing to the strong resistance to the sintering and high stability of the active phase.
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