Investigation of isosynthesis via CO hydrogenation over ZrO2 and CeO2 catalysts: Effects of crystallite size,phase composition and acid–base sites |
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| Affiliation: | 1. Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Phyathai Road, Phatumwan, Bangkok 10330, Thailand;2. Department of Chemical Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan;1. Department of Materials and Life Science, Faculty of Science and Technology, Seikei University, 3-3-1 Kichijoji-kitamachi, Musashino-shi, Tokyo 180-8633, Japan;2. Development of Resources and Envirnmental Engineering, School of Creative Science and Engineering, Waseda University, 3-4-1 Okubo, Shinju-ku, Tokyo 169-8555, Japan;1. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology 1, Sec. 3, Chung-Hsiao E. Road, Taipei 10608, Taiwan, ROC;2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;1. Department of Chemical and Biological Engineering, Center for Catalysis Research and Innovation (CCRI), University of Ottawa, 161 Louis-Pasteur St., Ottawa, ON K1N 6N5, Canada;2. National Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;1. School of Chemistry and Chemical Engineering, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan, PR China;2. Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, #08-03, 138634, Singapore;1. Department of Environmental Nano-Materials, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China;2. National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, PR China;3. Center of Research & Development, Shandong Sunway Petrochemical Engineering Share Co., Ltd, Beijing 100015, PR China |
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| Abstract: | This paper investigates the isosynthesis via CO hydrogenation over zirconia and ceria catalysts. Various techniques including XRD, NH3-TPD, CO2-TPD and BET surface area were employed for the catalyst characterization. The results showed that not only acid–base properties, but also crystallite size and crystal phase essentially influenced the catalytic performance. It was found that the activity and the selectivity of isobutene in hydrocarbons on nanoscale catalysts were higher than those on the micronscale ones. Moreover, the acid–base properties were dependent on the fraction of tetragonal phase for zirconia, but independent on crystal phase for ceria. The synthesized nanoscale zirconias were more active than the commercial one but less than the nanoscale ceria. From the results, it was indicated that zirconia with 29% tetragonal phase exhibited the highest activity. Furthermore, the presence of tetragonal phase in zirconia played an important role on the selectivity of isobutene in hydrocarbons. |
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