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Tin Modification on Ni/Al 2 O 3 : Designing Potent Coke‐Resistant Catalysts for the Dry Reforming of Methane
Author(s) -
Liu Jianjun,
Peng Honggen,
Liu Wenming,
Xu Xianglan,
Wang Xiang,
Li Changqing,
Zhou Wufeng,
Yuan Ping,
Chen Xiaohong,
Zhang Wuguo,
Zhan Haibo
Publication year - 2014
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.201402091
Subject(s) - thermogravimetric analysis , carbon dioxide reforming , catalysis , materials science , coke , x ray photoelectron spectroscopy , tin , differential scanning calorimetry , bimetallic strip , chemical engineering , temperature programmed reduction , scanning electron microscope , desorption , metallurgy , nuclear chemistry , syngas , chemistry , metal , composite material , organic chemistry , adsorption , physics , engineering , thermodynamics
Sn‐modified Ni/Al 2 O 3 catalysts for CH 4 dry reforming were prepared by co‐impregnation and two‐step impregnation methods and characterized by thermogravimetric analysis with differential scanning calorimetry, SEM, TEM, high‐angle annular dark‐field scanning transmission electron microscopy mapping, XRD, X‐ray photoelectron spectroscopy, H 2 temperature‐programmed reduction, and CO 2 temperature‐programmed desorption. After reduction, surface Ni‐Sn alloys were formed on the Ni particles, which changed the inherent activity of Ni sites and suppressed coking effectively with a mild loss of the activity. The catalysts with different amounts of surface Ni‐Sn alloys also provided strong evidence to prove that the coking rate and activity change tendency correlate well with the amount of the surface alloys. These results are of help to develop catalysts with potent resistance to coking for industrial use.