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Effect of the Mg/Al Atomic Ratio of Ni‐Mg‐Al Catalysts for the Hydrodealkylation of 1,2,4‐Trimethylbenzene
Author(s) -
Gao Shuang,
Zhai Shubo,
Yan Jianbiao,
Wang Zhenlu,
Wang Liyan
Publication year - 2015
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400154
Subject(s) - catalysis , coprecipitation , nial , benzene , toluene , fourier transform infrared spectroscopy , temperature programmed reduction , chemistry , desorption , inorganic chemistry , thermal desorption spectroscopy , nuclear chemistry , infrared spectroscopy , nanoparticle , materials science , chemical engineering , adsorption , organic chemistry , intermetallic , nanotechnology , alloy , engineering
The hydrodealkylation of 1,2,4‐trimethylbenzene (1,2,4‐TMB) to benzene, toluene and xylenes (BTX) was investigated on Ni‐Mg‐Al catalysts prepared by the coprecipitation method. The catalytic performances of these catalysts were considerably influenced by the Mg content of the catalyst. The catalysts were characterized via X‐ray diffraction, H 2 ‐temperature‐programmed reduction, NH 3 ‐temperature‐programmed desorption (TPD), CO 2 ‐TPD, and Fourier transform infrared spectroscopy. The results demonstrated that the appropriate amount of Mg species significantly affected the structural properties and caused the Ni nanoparticles to become highly dispersed. The higher activity of the catalysts might be ascribed to the homogenous distribution of the Ni nanoparticles, and the synergetic effects between Ni 0 , NiAl 2 O 4 and MgAl 2 O 4 were the key factor for obtaining the BTX.