文献类型：期刊文献

英文题名：Impact of double-solvent impregnation on the Ni dispersion of Ni/SBA-15 catalysts and catalytic performance for the syngas methanation reaction

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

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

年份：2016

卷号：6

期号：42

起止页码：35875

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20161902367577);WOS:【SCI-EXPANDED(收录号:WOS:000374349600088)】；

基金：This research was financially supported by National Natural Science Funds of China (Grant No. 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：Catalyst activity - Sintering - Synthesis gas - Hydrogenation - Nickel - Nickel oxide - Temperature programmed desorption - Transmission electron microscopy - X ray diffraction - Chemical reactors - Synthesis gas manufacture - Catalyst deactivation - Dispersions - Impregnation - Methanation

摘要：Several nickel-based SBA-15 catalysts with Ni content in range of 3 wt% to 10 wt% were prepared by the " double-solvent" impregnation method and investigated for synthetic natural gas (SNG) production in a continuous flow fixed-bed reactor. Using a double-solvent impregnation method could improve the dispersion of nickel particles, which significantly improved the catalytic activity of the Ni-based catalysts in the syngas methanation reaction. The 10% Ni/SBA-15(D) catalyst achieved the best activity with 100% CO conversion and about 99% CH4 yield at 400 degrees C, 0.3 MPa and 15 000 mL g(-1) h(-1). The catalysts were characterized by N-2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscope (TEM), H-2-temperature-programmed reduction (H-2-TPR), H-2 pulse chemisorption, CO-temperature-programmed desorption (CO-TPD) and thermogravimetric (TG). It could be speculated that using the double-solvent impregnation method strengthened the interactions between NiO and the support based on the TPR results. The results of XRD and TG analysis showed that catalyst sintering rather than carbon deposition led to catalyst deactivation in the heat-resistant performance and 100 h stability test.