| CO_2 methanation over TiO_2–Al_2O_3 binary oxides supported Ru catalysts |
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| 作者姓名： | Jinghua Xu Qingquan Lin Xiong Su Hongmin Duan Haoran Geng Yanqiang Huang |
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| 作者单位： | 1.School of Materials Science and Engineering, Shandong University, Jinan 250061, China;2.State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;3.School of Chemistry and Chemical Engineering, Yantai University, Shandong Applied Research Center of Gold Nanotechnology (Au-SDARC), Yantai 264005, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (21103173, 51271087, 21476226 and 51471076) and DICP Fundamental Research Program for Clean Energy (DICPM201307). |
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| 摘 要： | TiO_2 modified Al_2O_3 binary oxide was prepared by a wet-impregnation method and used as the support for ruthenium catalyst. The catalytic performance of Ru/TiO_2–Al_2O_3catalyst in CO_2 methanation reaction was investigated. Compared with Ru/Al_2O_3 catalyst, the Ru/TiO_2–Al_2O_3catalytic system exhibited a much higher activity in CO_2 methanation reaction. The reaction rate over Ru/TiO_2–Al_2O_3 was 0.59 mol CO_2·(g Ru)1·h-1, 3.1 times higher than that on Ru/Al_2O_30.19 mol CO_2·(gRu)-1·h-1]. The effect of TiO_2 content and TiO_2–Al_2O_3calcination temperature on catalytic performance was addressed. The corresponding structures of each catalyst were characterized by means of H_2-TPR, XRD, and TEM. Results indicated that the averaged particle size of the Ru on TiO_2–Al_2O_3support is 2.8 nm, smaller than that on Al_2O_3 support of 4.3 nm. Therefore, we conclude that the improved activity over Ru/TiO_2–Al_2O_3catalyst is originated from the smaller particle size of ruthenium resulting from a strong interaction between Ru and the rutile-TiO_2 support, which hindered the aggregation of Ru nanoparticles.
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| 关 键 词： | CO2 methanation Supported Ru catalyst TiO2-Al2O3 binary oxide |
| 收稿时间： | 2014-11-08 |
CO2 methanation over TiO2-Al2O3 binary oxides supported Ru catalysts |
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| Jinghua Xu,Qingquan Lin,Xiong Su,Hongmin Duan,Haoran Geng,Yanqiang Huang.CO2 methanation over TiO2-Al2O3 binary oxides supported Ru catalysts[J].Chinese Journal of Chemical Engineering,2016,24(1):140-145. |
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| Authors: | Jinghua Xu Qingquan Lin Xiong Su Hongmin Duan Haoran Geng Yanqiang Huang |
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| Affiliation: | 1.School of Materials Science and Engineering, Shandong University, Jinan 250061, China;2.State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;3.School of Chemistry and Chemical Engineering, Yantai University, Shandong Applied Research Center of Gold Nanotechnology (Au-SDARC), Yantai 264005, China |
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| Abstract: | TiO2 modified Al2O3 binary oxide was prepared by a wet-impregnation method and used as the support for ruthenium catalyst. The catalytic performance of Ru/TiO2-Al2O3 catalyst in CO2 methanation reaction was investigated. Compared with Ru/Al2O3 catalyst, the Ru/TiO2-Al2O3 catalytic system exhibited a much higher activity in CO2 methanation reaction. The reaction rate over Ru/TiO2-Al2O3 was 0.59 mol CO2·(g Ru)-1·h-1, 3.1 times higher than that on Ru/Al2O3 0.19 mol CO2·(g Ru)-1·h-1]. The effect of TiO2 content and TiO2-Al2O3 calcination temperature on catalytic performance was addressed. The corresponding structures of each catalyst were characterized by means of H2-TPR, XRD, and TEM. Results indicated that the averaged particle size of the Ru on TiO2-Al2O3 support is 2.8 nm, smaller than that on Al2O3 support of 4.3 nm. Therefore, we conclude that the improved activity over Ru/TiO2-Al2O3 catalyst is originated from the smaller particle size of ruthenium resulting from a strong interaction between Ru and the rutile-TiO2 support, which hindered the aggregation of Ru nanoparticles. |
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| Keywords: | CO2 methanation Supported Ru catalyst TiO2-Al2O3 binary oxide |
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