Selective oxidation of H2S over V2O5 supported on CeO2-intercalated Laponite clay catalysts

被引：43
作者：
Zhang, Xin [1 ]
Dou, Guangyu [1 ]
Wang, Zhuo [1 ]
Cheng, Jie [1 ]
Wang, Hailin [1 ]
Ma, Chunyan [1 ]
Hao, Zhengping [1 ]
机构：
[1] Chinese Acad Sci, Dept Environm Nanomat, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
来源：
CATALYSIS SCIENCE & TECHNOLOGY | 2013年 / 3卷 / 10期
基金：
国家高技术研究发展计划(863计划);
关键词：
MIXED-OXIDE CATALYSTS; PILLARED MONTMORILLONITE; HYDROGEN-SULFIDE; CEO2; CATALYSTS; REDUCTION; SULFUR; XPS; NO; SILICA; SO2;
D O I：
10.1039/c3cy00431g
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of V2O5 supported on CeO2-intercalated clay catalysts (named V2O5/Ce-Lap catalysts) with mesoporous structure and high specific surface area were prepared. The structural characteristics and physicochemical properties were studied in detail. These catalysts were evaluated for the H2S selective oxidation. It was revealed that all V2O5/Ce-Lap catalysts showed high catalytic activities in the temperature range of 120-220 degrees C due to the redox reaction of highly dispersed V5+ species, and the catalytic mechanism obeyed a redox process, i.e. a stepwise mechanism. Additionally, the chemically absorbed oxygen also played an important role in H2S selective oxidation. Among them, the 5% V2O5/Ce-Lap catalyst presented the best catalytic activity and excellent regenerability at 180 degrees C. Finally, the catalyst deactivation mechanism was explored.
引用
收藏
页码：2778 / 2785
页数：8
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