Theoretical and experimental study on the deactivation of V2O5 based catalyst by lead for selective catalytic reduction of nitric oxides

被引：120

作者：

Gao, Xiang ^{[1
]}

Du, Xue-sen ^{[1
]}

Fu, Yin-cheng ^{[1
]}

Mao, Jian-hong ^{[1
]}

Luo, Zhong-yang ^{[1
]}

Ni, Ming-jiang ^{[1
]}

Cen, Ke-fa ^{[1
]}

机构：

[1] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Peoples R China

来源：

CATALYSIS TODAY | 2011年 / 175卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Selective catalytic reduction; Deactivation; Lead; Density functional theory; V2O5; V2O5/WO3-TIO2 SCR CATALYSTS; DENSITY-FUNCTIONAL THEORY; GETTER FUEL ADDITIVES; VANADIUM-OXIDE; CHEMICAL DEACTIVATION; REACTION-PRODUCTS; LUBRICATION OILS; CLUSTER MODEL; UREA SOLUTION; ALKALI;

D O I：

10.1016/j.cattod.2011.05.025

中图分类号：

O69 [应用化学];

学科分类号：

070301 [无机化学];

摘要：

A combination of theoretical and experimental methods, including DFT calculation, BET, Raman spectroscopy, NH3-TPD, H-2-TPR and XPS, has been used to elucidate the mechanism of lead deactivating effect on the V2O5 based SCR catalyst. The theoretical calculations have shown that the doping of lead atom will cause the great change of the surface electronic property. Each lead atom will influence two active sites, resulting in the decrease of the acid formability and reducibility of the catalyst surface. The NH3-TPD and H-2-TPR experiments have shown the decrease of acid site amount and reducibility, which is in accordance with the calculation result. The BET result has also shown the physical influence caused by the doping of lead compound. The NO conversion experiment has confirmed the deactivation effect of lead on the V2O5 based catalyst. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：625 / 630

页数：6

共 28 条

[1]

Density functional theory studies of mechanistic aspects of the SCR reaction on vanadium oxide catalysts [J].