Hebei Messi Biology Co., Ltd. stated that this topic mainly studies and discusses the application of nickel-based catalysts with cordierite as carrier in the production of synthesis gas by carbon dioxide reforming reaction of methane. Cordierite as a carrier exhibits good mechanical properties and thermal stability. The experiment compared the differences in catalytic reactions of nickel-based catalysts with magnesium oxide and β-molecular sieve as carriers, and investigated the effects of nickel loading, the addition of auxiliary lanthanum, calcination temperature, reaction temperature and raw gas ratio on the catalytic activity and stability of the reforming reaction. The surface morphology and composition of the catalyst were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TG-DTG), scanning electron microscopy (SEM) and other techniques.
The results show that cordierite as a carrier exhibits good catalytic activity and selectivity, the optimal loading of Ni is 10%, the optimal calcination temperature is 773K, the most suitable reaction temperature is 1023K, and the optimal raw gas ratio is CH4/CO2=0.7.
This paper also studies the catalytic performance of nickel-cobalt bicomponent catalysts. By adding Co as the second active component to the Ni/Crd (cordierite) catalyst to form a nickel-cobalt bicomponent catalyst, this was taken as the research object, and combined with X-ray diffraction (XRD) and temperature-programmed reduction (TPR) characterization and analysis methods, its catalytic activity for methane carbon dioxide reforming reaction was investigated. By comparing with the single metal active component catalyst, the ideal bimetallic component ratio was obtained, and the effects of impregnation sequence and preparation method on catalyst performance were also explored. The experiment showed that the catalytic activity of nickel-cobalt bimetallic catalysts was generally higher than that of single active component catalysts, and the catalytic activity reached the highest when the nickel-cobalt ratio was 5%Ni-5%Co/Crd. The catalyst with the impregnation order of cobalt first and nickel later had higher catalytic activity than the catalyst with the opposite order. At the same time, compared with the ordinary impregnation method, the catalyst prepared by the Sol-Gel method had better catalytic performance.