화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.35, No.2, 421-427, February, 2018
DOI10.1007/s11814-017-0267-y  Export Citation
Reduction of CO2 to CO via reverse water-gas shift reaction over CeO2 catalyst
Bican Dai1, Shiquan Cao1, Hongmei Xie1, Guilin Zhou1, 2, †, and Shengming Chen1
  • 1Chongqing Key Laboratory of Catalysis & Environmental New Materials, Department of Materials Science and Engineering, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China
  • 2Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing 400067, China
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CeO2 catalysts with different structure were prepared by hard-template (Ce-HT), complex (Ce-CA), and precipitation methods (Ce-PC), and their performance in CO2 reverse water gas shift (RWGS) reaction was investigated. The catalysts were characterized using XRD, TEM, BET, H2-TPR, and in-situ XPS. The results indicated that the structure of CeO2 catalysts was significantly affected by the preparation method. The porous structure and large specific surface area enhanced the catalytic activity of the studied CeO2 catalysts. Oxygen vacancies as active sites were formed in the CeO2 catalysts by H2 reduction at 400 °C. The Ce-HT, Ce-CA, and Ce-PC catalysts have a 100% CO selectivity and CO2 conversion at 580 °Cwas 15.9%, 9.3%, and 12.7%, respectively. The highest CO2 RWGS reaction catalytic activity for the Ce-HT catalyst was related to the porous structure, large specific surface area (144.9m2.g -1) and formed abundant oxygen vacancies.
Keywords:Cerium Oxide Catalyst;Carbon Dioxide;Carbon Monoxide;Reverse Water-gas Shift (RWGS) Reaction;Oxygen Vacancy
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