Characteristics of vanadia on the surface of V2O5/Ti-PILC catalyst for the reduction of NOx by NH3

被引：89

作者：

Chae, HJ

Nam, IS ^{[1
]}

Ham, SW

Hong, SB

机构：

[1] Pohang Univ Sci & Technol, Sch Environm Sci & Engn, Dept Chem Engn, Pohang 790784, South Korea

[2] Kyungil Univ, Dept Chem Engn, Kyungsan 712701, South Korea

[3] Hanbat Univ, Dept Chem Engn, Taejon 300717, South Korea

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2004年 / 53卷 / 02期

关键词：

pillared interlayered clay (PILC); structure of vanadia species; NMR; Raman; selective catalytic reduction;

D O I：

10.1016/j.apcatb.2004.04.018

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 vanadia catalysts impregnated on titania pillared interlayered clays (Ti-PILCs) were prepared to identify the characteristics of vanadia on the surface of Ti-PILC for the selective catalytic reduction (SCR) of NO by NH3. V2O5/Ti-PILC exhibited superior performance as a novel SCR catalyst compared to conventional catalysts including V2O5/TiO2 and V2O5/Al2O3. NO removal activity over the supported vanadia catalyst is strongly influenced by the structure of vanadia species on the catalyst surface. The structure of vanadia species on various supports including TiO2, Al2O3, and SiO2 along with Ti-PILC has been examined by XRD, NMR and Raman analyses for the comparative study. Increasing the content of vanadia up to the monolayer coverage of the surface of Ti-PILC catalyst enhanced the ratio of the polymerized surface vanadia species to the isolated ones. These results are well correlated with TOF of vanadia on the catalyst surface for the reduction of NO by NH3. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：117 / 126

页数：10

共 35 条

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