Regeneration of sulfur-poisoned CeO2 catalyst for NH3-SCR of NOx

被引：44

作者：

Shi, Yun ^{[1
,2
]}

Tan, Shan ^{[1
]}

Wang, Xiaoxiang ^{[1
]}

Li, Meifang ^{[1
]}

Li, Sujing ^{[1
]}

Li, Wei ^{[1
]}

机构：

[1] Zhejiang Univ, Inst Ind Ecol & Environm, Minist Educ, Key Lab Biomass Chem Engn, Hangzhou 310027, Zhejiang, Peoples R China

[2] Zhejiang Univ, Inst Environm Engn, Hangzhou 310058, Zhejiang, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2016年 / 86卷

基金：

中国国家自然科学基金;

关键词：

CeO2; NH3-SCR catalyst; Sulfation; Regeneration; NOx; SO2; DIESEL-ENGINE EXHAUST; REDUCTION; OXIDATION; SULFATION; CERIA; SO2; NH3; PERFORMANCE; AMMONIA; H-2-SCR;

D O I：

10.1016/j.catcom.2016.08.004

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：

The effects of regeneration on the activities and structure of CeO2 catalysts for NH3-SCR of NOx have been studied in this article. CeO2 catalyst is deactivated by SO2 for NH3-SCR of NOx in a 200 h long-term operation at 350 degrees C due to the formation of sulfates, and its NOx conversion decreases from 100% to 83% gradually. However, sulfates can be removed from sulfur-poisoned CeO2 catalysts under high temperature thermal treatment in air. After regeneration, NOx conversion of sulfur-poisoned CeO2 catalyst is recovered to about 100% at 350 degrees C. Moreover, the regeneration temperature is related to the nature of the sulfates formed on the sulfur-poisoned CeO2 catalysts. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：67 / 71

页数：5