文献类型：期刊文献

英文题名：Effect of impregnation solvent on Ni dispersion and catalytic properties of Ni/SBA-15 for CO methanation reaction

作者：Tao, Miao[1];Meng, Xin[1,2];Lv, Yuhao[1];Bian, Zhicheng[1];Xin, Zhong[1,2]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2016

卷号：165

起止页码：289

外文期刊名：FUEL

收录：;EI(收录号：20154501513555);WOS:【SCI-EXPANDED(收录号:WOS:000364655000034)】；

基金：This research was financially supported by National Natural Science Funds of China (Grant Nos. U1203293 and 91434128), the Program of Shanghai Subject Chief Scientist (Grant No. 10XD1401500) and the Program of Shanghai Leading Talents (2013).

语种：英文

外文关键词：CO methanation; Impregnation solvent; Nickel-based catalyst; SBA-15

摘要：A series of SBA-15-supported Ni catalysts were prepared by incipient-wetness impregnation with different nickel nitrate solutions and applied in the CO methanation reaction for the production of synthetic natural gas (SNG). The catalysts were also characterized using X-ray diffraction (XRD), N-2 physisorption measurements, hydrogen temperature-programmed reduction (H-2-TPR), CO chemisorption, CO temperature-programmed desorption (CO-TPD) and transmission electron microscope (TEM). The results showed that the impregnation solvent influenced the catalytic activity in the CO methanation. The catalyst 20% Ni/SBA-15(ET) prepared from ethanol solution exhibited the highest activity with 100% CO conversion and 95% CH4 yield at 300 degrees C under 0.3 MPa. The effect of impregnation solvents could be related to the polarities of solvents and the solubility of nickel nitrate. The decreased polarity of the solvent caused an increase in the interaction between the nickel complex and silica surface, which would promote the fixation of the precursor onto the silica support and increase the nickel dispersion. As a result, the activity of the catalysts was improved effectively. The lifetime test also indicated that Ni based SBA-15 catalysts had a good catalytic stability. This was because of the stronger interaction between Ni and support. (C) 2015 Published by Elsevier Ltd.