Dehydrogenation of Ethylbenzene in Presence of Carbon Dioxide Over Supported Fe2O3-Cr2O3 Mixed Oxides Catalysts

被引：1
|
作者：
Aouissi, Ahmed [1 ]
Bayahia, Hoceine [1 ]
Al-Othman, Zeid A. [1 ]
Siddiqui, M. Rafiq H. [1 ]
机构：
[1] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia
来源：
ASIAN JOURNAL OF CHEMISTRY | 2014年 / 26卷 / 02期
关键词：
Mixed oxides; Ethylbenzene dehydrogenation; Styrene; Carbon dioxide; Support; OXIDATIVE DEHYDROGENATION; STYRENE; CO2; WATER;
D O I：
10.14233/ajchem.2014.15601
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Dehydrogenation of ethylbenzene to styrene in the presence of carbon dioxide was investigated over a series of binary iron-chromium oxides (Fe2O3-Cr2O3) supported On alumina, silica and titania. The catalysts were characterized by Means of XRD, IR and SEM. XRD and FT-IR characterization indicated that iron and chromium ions are dispersed into the support Matrix. Compared to Fe-Cr-Si-30 and Fe-Cr-Ti-30 catalysts, Fe-Cr-Al-30 was found to be the most active (conversion = 57.2 %) and the Most selective in styrene (94.1 %). The activity value was observed in the following order Fe-Cr-Al > Fe-Cr-Ti > Fe-Cr-Si. SEM images indicated that there are no significant carbonaceous deposits on the spent Fe Cr-Al-30 catalyst, whereas modifications of its morphological aspect were observed. The variation of Fe-Cr content in the Fe-Cr-Al catalysts showed that the activity depends strongly on the Content. The optimal content determined was 50 wt- %.
引用
收藏
页码：504 / 508
页数：5
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