CO2 methanation over TiO2-Al2O3 binary oxides supported Ru catalysts

被引：37

作者：

Xu, Jinghua ^{[1
,2
]}

Lin, Qingquan ^{[3
]}

Su, Xiong ^{[2
]}

Duan, Hongmin ^{[2
]}

Geng, Haoran ^{[1
]}

Huang, Yanqiang ^{[2
]}

机构：

[1] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Peoples R China

[2] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

[3] Yantai Univ, Sch Chem & Chem Engn, Shandong Appl Res Ctr Gold Nanotechnol Au SDARC, Yantai 264005, Peoples R China

来源：

CHINESE JOURNAL OF CHEMICAL ENGINEERING | 2016年 / 24卷 / 01期

基金：

中国国家自然科学基金;

关键词：

CO2; methanation; Supported Ru catalyst; TiO2-Al2O3 binary oxide; HYDROGENATION; PERFORMANCE; NANOPARTICLES; TIO2;

D O I：

10.1016/j.cjche.2015.07.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

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 H-2-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. (C)c 2015 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.

引用

页码：140 / 145

页数：6

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