期刊
APPLIED SURFACE SCIENCE
卷 389, 期 -, 页码 25-33出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2016.07.063
关键词
Dry reforming of methane; Nickel; Al2O3; MgO; Hydrothermal
类别
资金
- National Natural Science Foundation of P. R. China [91334206]
- Ministry of Education of P. R. China [NCET-13-0653]
- National 863 program of P. R. China [2013AA031702]
- Innovation and Promotion Project of Beijing University of Chemical Technology [JC1505]
- BUCT Fund for Disciplines Construction and Development [XK1505]
- China Postdoctoral Science Foundation [2016M591051]
Carbon dioxide reforming of methane has been investigated on a series of Ni/MgO-Al2O3 catalysts prepared by a simple two-step hydrothermal method. The sheet-like Ni/MgO-Al2O3 (15%) catalyst afforded as high as 52% CH4 conversion, which is almost six times higher than that of original Ni/MgO catalyst, with excellent stability during reaction, at relatively higher space velocity (6 x 10(5) cm(3).g cat(-1).H-1) and lower reaction temperature (923 K). The effects of different ratio of Mg and Al have been investigated to understand the catalytic activity and coke formation for the obtained catalysts. The characterization results show that the addition Al2O3 to MgO would contribute to forming MgAl2O4 phase, which is stable and could effectively increase the CO2 adsorption due to the increased basic sites on the surface of catalyst, contributing to higher catalytic activity and better stability of this kind of catalyst during the dry reforming reaction. The catalysts were characterized by different techniques, such as BET, H-2-TPR, XRD, SEM, CO2-TPD, TG-DTA and TEM analysis. (C) 2016 Elsevier B.V. All rights reserved.
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