Optimization of Cobalt Loading in Co–CeO2 Catalyst for the High Temperature Water–Gas Shift Reaction

Yeol Lim Lee, Ajay Jha, Won Jun Jang, Jae Oh Shim, Kyung Won Jeon, Hyun Suk Na, Hak Min Kim, Da We Lee, Seong Yeun Yoo, Byong Hun Jeon, Jong Wook Bae, Hyun Seog Roh

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Abstract

We varied the cobalt loading (10, 15, 25, 35 wt%) to determine the optimum loading in a Co–CeO2 catalytic system used for the high temperature water–gas shift (WGS) reaction. Severe reaction conditions were used to compare the catalytic performances including a very high gas hourly space velocity (142,663 h−1) and a high CO concentration (~38%). Among the prepared catalysts, 15% Co–CeO2 exhibited excellent catalytic activity in the temperature range of 350–550 °C without promoting the methanation reaction. In addition, this catalyst showed relatively stable activity for 50 h at 400 °C. The outstanding performance of 15% Co–CeO2 catalyst is mainly due to the highest amount of dispersed cobalt atoms on the catalyst surface. Additionally, the WGS activity was affected by the oxygen vacancy concentration.

Original languageEnglish
Pages (from-to)721-726
Number of pages6
JournalTopics in Catalysis
Volume60
Issue number9-11
DOIs
Publication statusPublished - 2017 Jan 1

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Lee, Y. L., Jha, A., Jang, W. J., Shim, J. O., Jeon, K. W., Na, H. S., Kim, H. M., Lee, D. W., Yoo, S. Y., Jeon, B. H., Bae, J. W., & Roh, H. S. (2017). Optimization of Cobalt Loading in Co–CeO2 Catalyst for the High Temperature Water–Gas Shift Reaction. Topics in Catalysis, 60(9-11), 721-726. https://doi.org/10.1007/s11244-017-0776-2