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Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al2O3 and Ni–Ce/Al2O3 Catalysts in Oxidative Dehydrogenation of Ethane
Year: 2015
Type of publication: článek v odborném periodiku
Name of source: Industrial & Engineering Chemistry Reseach
Page from-to: 12730-12740
Titles:
Language Name Abstract Keywords
cze Vliv kalcinační teploty na strukturu a katalytickou účinnost Ni-Al2O3 a Ni-Ce/Al2O3 katalyzátorů pro oxidativní dehydrogenaci etanu Studovali jsme vliv kalcinační teploty na vlastnosti katalyzátorů Ni-Al2O3 a Ni-Ce/Al2O3 jako jsou specifický povrch, rozměry pórů, kyselost, redukovatelnost Ni částic, katalytická aktivita a selektivita v oxidativní dehydrogenaci etanu. katalyzátor; Ni/Al2O3; Ce/Al2O3; oxidativní dehydrogenace; etan
eng Effect of Calcination Temperature on the Structure and Catalytic Performance of the Ni/Al2O3 and Ni–Ce/Al2O3 Catalysts in Oxidative Dehydrogenation of Ethane We studied the effect of calcination temperature of Ni/Al2O3 and Ni–Ce/Al2O3 catalysts on the specific surface area, acidity, ratio of pore volume and specific surface area, reducibility reflecting the changing population of Ni(Td) and Ni(Oh) species, and activity/selectivity in oxidative dehydrogenation of ethane. It should be stressed that the role of Ce as a promoter on the catalytic activity of Ni–Ce/Al2O3 catalysts decreased with an increasing value of the calcination temperature. At a reaction temperature of 500 °C, the highest productivity to ethene was observed for the Ni–Ce/Al2O3 catalyst calcined at 500 °C. Ni–Ce/Al2O3 catalysts calcined at 500–750 °C showed the same selectivity to ethene. The Ni–Ce/Al2O3 catalysts calcined at 900 and 1000 °C showed a sharp decrease in the selectivity and the activity, which was probably associated with the formation of NiAl2O4 spinel. catalyst; Ni/Al2O3; Ce/Al2O3; oxidative dehydrogenation; ethane

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