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
收藏
页码：67 / 71
页数：5
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