脱氢
催化作用
丁烷
丙烷
化学
钻石
烷烃
无机化学
光化学
二氧化碳
有机化学
作者
Kiyoharu Nakagawa,Chiaki Kajita,Naoki Ikenaga,Mikka Nishitani‐Gamo,Toshihiro Ando,Toshimitsu Suzuki
出处
期刊:Catalysis Today
[Elsevier]
日期:2003-09-01
卷期号:84 (3-4): 149-157
被引量:71
标识
DOI:10.1016/s0920-5861(03)00268-2
摘要
Oxidized diamond demonstrated excellent support for the dehydrogenation of light alkanes to alkenes in the presence of CO2. Oxidized diamond-supported Cr2O3 and V2O5 catalysts exhibited comparatively higher catalytic activities in the dehydrogenation of lower alkanes in the presence of CO2. In the dehydrogenation of propane, the oxidized diamond-supported Cr2O3 and V2O5 catalysts in the presence of CO2 afforded nearly twofold higher activities than that in the absence of CO2. The activity of the oxidized diamond-supported V2O5 catalyst in the dehydrogenation of propane increased with increasing reaction temperatures. Furthermore, in the dehydrogenation of n-butane and iso-butane, a promoting effect of CO2 on butane conversion and butenes yields was observed over the oxidized diamond-supported Cr2O3 and V2O5 catalysts, though the promotion effect was small. UV-Vis analyses of the fresh and the reacted catalysts in the presence and absence of CO2 revealed that CO2 kept the surface V2O5 and Cr2O3 in a state of oxidation slightly higher than that in the absence of CO2.
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