Catalytic combustion of methane over a highly active and stable Ni0/Ce02 catalyst  

作　　者：Xiuhui Huang Junfeng Li Jun Wang Zeqiu Li Jiayin Xu 

机构地区：[1]School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China [2]Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China [3]Shanghai MCC20 Construction Co.Ltd,Shanghai 201999,China

出　　处：《Frontiers of Chemical Science and Engineering》2020年第4期534-545,共12页化学科学与工程前沿（英文版）

基　　金：supported financially by Shanghai Sailing Program(17YF1413100);Shanghai Rising-Star Program(19QB1401700).

摘　　要：In the last decades,many reports dealing with technology for the catalytic combustion of methane(CH4)have been published.Recently,attention has increasingly focused on the synthesis and catalytic activity of nickel oxides.In this paper,a NiO/CeO2 catalyst with high catalytic performance in methane combustion was synthe-sized via a facile impregnation method,and its catalytic activity,stability,and water-resistance during CH4 com-bustion were investigated.X-ray diffraction,low-tempera-ture N2 adsorption,thermogravimetric analysis,Fourier transform infrared spectroscopy,hydrogen temperature programmed reduction,methane temperature programmed surface reaction,Raman spectroscopy,electron paramag-netic resonance,and transmission electron microscope characterization of the catalyst were conducted to determine the origin of its high catalytic activity and stability in detail.The incorporation of NiO was found to enhance the concentration of oxygen vacancies,as well as the activity and amount of surface oxygen.As a result,the mobility of bulk oxygen in CeO2 was increased.The presence of CeO2 prevented the aggregation of NiO,enhanced reduction by NiO,and provided more oxygen species for the combustion ofCH4.The results of a kinetics study indicated that the reaction order was about 1.07 for CH4 and about 0.10 for O2 over the NiO/CeO2 catalyst.

关 键 词：methane combustion NiO/CeO2 catalyst interaction oxygen vacancy kinetic study 

分 类 号：TQ038.4[化学工程] O643.3[理学—物理化学]