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

Yeol Lim Lee, Kyoung Jin Kim, Won Jun Jang, Jae Oh Shim, Kyung Won Jeon, Hyun Suk Na, Hak Min Kim, Jong Wook Bae, Sung Chan Nam, Byong Hun Jeon, Hyun Seog Roh

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2 Scopus citations

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, H2–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 (Co0). 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.

Original languageEnglish
Pages (from-to)2715-2722
Number of pages8
JournalRenewable Energy
Volume145
DOIs
StatePublished - 2020 Jan

Keywords

  • Ba promoter
  • Co/CeO catalyst
  • High-temperature water-gas shift
  • Stability
  • Waste-derived synthesis gas

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