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Received June 19, 2017
Accepted September 25, 2017
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Reduction of CO2 to CO via reverse water-gas shift reaction over CeO2 catalyst
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
dicpglzhou@ctbu.edu.cn, upcglzhou@sohu.com
Korean Journal of Chemical Engineering, February 2018, 35(2), 421-427(7), 10.1007/s11814-017-0267-y
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Abstract
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.
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References
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