CO2 methanation over TiO2-Al2O3 binary oxides supported Ru catalysts

doi:10.1016/j.cjche.2015.07.002

Chin.J.Chem.Eng. ›› 2016, Vol. 24 ›› Issue (1): 140-145.DOI: 10.1016/j.cjche.2015.07.002

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CO₂ methanation over TiO₂-Al₂O₃ binary oxides supported Ru catalysts

Jinghua Xu^1,2, Qingquan Lin³, Xiong Su², Hongmin Duan², Haoran Geng¹, Yanqiang Huang²

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

Received:2014-11-08 Revised:2015-07-06 Online:2016-02-23 Published:2016-01-28
Contact: Haoran Geng, Yanqiang Huang
Supported by:
Supported by the National Natural Science Foundation of China (21103173, 51271087, 21476226 and 51471076) and DICP Fundamental Research Program for Clean Energy (DICPM201307).

CO₂ methanation over TiO₂-Al₂O₃ binary oxides supported Ru catalysts

Jinghua Xu^1,2, Qingquan Lin³, Xiong Su², Hongmin Duan², Haoran Geng¹, Yanqiang Huang²

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

通讯作者: Haoran Geng, Yanqiang Huang
基金资助:
Supported by the National Natural Science Foundation of China (21103173, 51271087, 21476226 and 51471076) and DICP Fundamental Research Program for Clean Energy (DICPM201307).

Abstract

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.

Key words: CO₂ methanation, Supported Ru catalyst, TiO₂-Al₂O₃ binary oxide

摘要： 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.

关键词: CO₂ methanation, Supported Ru catalyst, TiO₂-Al₂O₃ binary oxide

Jinghua Xu, Qingquan Lin, Xiong Su, Hongmin Duan, Haoran Geng, Yanqiang Huang. CO₂ methanation over TiO₂-Al₂O₃ binary oxides supported Ru catalysts[J]. Chin.J.Chem.Eng., 2016, 24(1): 140-145.

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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CO₂ methanation over TiO₂-Al₂O₃ binary oxides supported Ru catalysts

CO₂ methanation over TiO₂-Al₂O₃ binary oxides supported Ru catalysts

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