期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 54, 期 51, 页码 12730-12740出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.5b03425
关键词
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资金
- ESF
- Ministry of Education, Youth and Sports of the Czech Republic [CZ.1.07/2.3.00/30.0058]
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(T-d) and Ni(O-h) 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 degrees C, the highest productivity to ethene was observed for the Ni-Ce/Al2O3 catalyst calcined at 500 degrees C. Ni-Ce/Al2O3 catalysts calcined at 500-750 degrees C showed the same selectivity to ethene. The Ni-Ce/Al2O3 catalysts calcined at 900 and 1000 degrees C showed a sharp decrease in the selectivity and the activity, which was probably associated with the formation of NiAl2O4 spinel.
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