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Methane Dry Reforming over Coke‐Resistant Mesoporous Ni‐Al 2 O 3 Catalysts Prepared by Evaporation‐Induced Self‐Assembly Method
Author(s) -
Fang Xiuzhong,
Peng Cheng,
Peng Honggen,
Liu Wenming,
Xu Xianglan,
Wang Xiang,
Li Changqing,
Zhou Wufeng
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500538
Subject(s) - carbon dioxide reforming , catalysis , coke , mesoporous material , crystallite , methane , materials science , chemical engineering , desorption , adsorption , evaporation , metallurgy , chemistry , syngas , organic chemistry , physics , engineering , thermodynamics
Mesoporous Ni‐Al 2 O 3 catalysts were prepared in one pot following an evaporation‐induced self‐assembly method (EISA) and used for methane dry reforming. Compared with a traditional Ni/Al 2 O 3 catalyst prepared through impregnation method (IMP), the EISA catalysts display significantly improved coke resistance and activity. It is revealed by small‐angle XRD (SXRD), N 2 adsorption–desorption, and TEM that an ordered mesoporous structure was formed in the EISA catalysts, which impedes the aggregation of the Ni sites and aids in the mass transfer of the reaction. In addition, the Ni species in the reduced EISA samples more dispersed, more uniformly distributed, and have smaller crystallite size, as evidenced by XRD, H 2 adsorption–desorption, and TEM results. It is speculated that these are the major reasons accounting for the significantly improved dry reforming performance of the EISA catalysts.