脱氢
丙烯
丙烷
催化作用
铬
氧化物
石油化工
碳纤维
复制品
化学工程
无机化学
材料科学
化学
选择性
吸附
甲烷
有机化学
冶金
复合材料
视觉艺术
艺术
复合数
作者
Adam Węgrzyniak,Sebastian Jarczewski,Anna Wach,Elżbieta Hędrzak,Piotr Kuśtrowski,Piotr Michorczyk
标识
DOI:10.1016/j.apcata.2015.10.002
摘要
Abstract Ordered mesoporous carbons (CMK-3) were prepared by structure replication of mesoporous SBA-15 using sucrose as a carbon source. Based on this mesoporous carbon support a series of Cr/CMK-3 catalysts with a Cr loading varying in the range of 1–40 wt.% of Cr 2 O 3 were prepared by the impregnation method. Both the silica support and the carbon catalysts were characterized by means of low-temperature N 2 sorption, XRD, H 2 -TPR, XPS and TGA. The catalytic performance of Cr/CMK-3 catalysts was tested in the dehydrogenation of propane. The conversion of propane increased with raising the chromium content up to 20 wt.% of Cr 2 O 3 . It was also found that the oxidation state of Cr in the studied catalysts slightly depended on the Cr loading. In all fresh samples, amorphous Cr(III) species predominated. However, alpha-Cr 2 O 3 and traces of Cr(VI) species were found for the Cr/CMK-3 catalysts samples with a relatively high Cr content.
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