CH4/CO2 reforming over La2NiO4/Al2O3 catalyst

CO2 reforming of CH4 over Ni-based catalysts has attracted worldwide attention from both industrial and environmental sectors. However, the stability of catalyst is one of the factors that inhibits the industrialization of CH4/CO2 reforming. La2NiO4/Al2O3 catalyst with spinel structure was prepared by sol-gel method. The pore size distribution, specific surface area and composition in the bulk of the catalyst as well as the thermal weight loss and decomposing process of gel were characterized by means of BET, XRD and TG, respectively. The catalyst was applied to CH4/CO2 reforming to syngas, meanwhile, the influence of inert gas, reaction temperature and time on the reactant conversion, product selectivity and carbon deposition was investigated. The results indicated that under the conditions of GHSV = 4.8 X 10(4) ml/(g (.) h) and theta = 700 degreesC, the conversion of CH4 and CO2 was 51% and 60%, the selectivity for CO and H-2 was 98% and 92%, respectively. The introduction of inert gas He could obviously enhance the conversion of CH4 and CO2; the results of characterization showed that the addition of La2O3 and the formation of La2NiO4 spinel structure were favorable for the CO2 activation and the coke elimination.