In situ preparation of mesoporous V2O5-WO3/TiO2 catalyst by sol-gel method and its performance for NH3-SCR reaction

被引：0
|
作者：
Guo F. [1 ]
Yu J. [1 ]
Tran T.-S. [1 ]
Li C. [1 ]
Xu G. [1 ]
机构：
[1] State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2017年 / 68卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Catalysis; In situ sol-gel; Mesoporous structure; Structure-directing agent;
D O I：
10.11949/j.issn.0438-1157.20170434
中图分类号：
学科分类号：
摘要：
A series of V2O5-WO3/TiO2 catalysts were prepared by the in situ sol-gel method with different amounts of cetyl trimethyl ammonium bromide(CTAB) as structure-directing agent. The XRD, BET, SEM and XPS were performed to characterize the catalysts. The results demonstrated that the introduction of CTAB facilitated the formation of mesoporous structure with increased specific surface area and pore volume, resulting in the high dispersion of active components and thus more bared V2O5 on the surface of support. Moreover, the ratios of V4+/V5+ decrease with the increase of CTAB content, which reduce the oxidation capacity of the surface vanadium species and enhance the low-temperature activity together with the high-temperature selectivity. The results of activity evaluation indicate that the introduction of CTAB obviously promote the catalytic performance, and CTAB-0.01 catalyst has the highest low-temperature denitration activity (85.6% NO conversion at 200℃) and the widest temperature window (above 90% NO conversion from 212℃ to 393℃). © All Right Reserved.
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页码：3747 / 3754
页数：7
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