TiO2改性银铝催化剂选择性丙烯还原NOx硫失活机制研究 Deactivation of TiO2-modified Ag/Al2O3 catalyst by SO2 in the reduction of NOx by propene期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

TiO₂改性银铝催化剂选择性丙烯还原NO_x硫失活机制研究

引用本文：	刘有发,欧阳杰宏,王丽珊,苏艳霞,吴军良,付名利,黄碧纯,叶代启.TiO₂改性银铝催化剂选择性丙烯还原NO_x硫失活机制研究[J].环境科学学报,2012,32(10):2524-2532.

作者姓名：	刘有发欧阳杰宏王丽珊苏艳霞吴军良付名利黄碧纯叶代启

作者单位：	1. 华南理工大学环境科学与工程学院,广州,510006 2. 华南理工大学环境科学与工程学院,广州510006 工业聚集区污染控制与生态修复教育部重点实验室,广州510006 广东省大气环境与污染控制重点实验室,广州510006

基金项目：	国家自然科学基金(No.51108187);大气污染控制广东高校工程技术研究中心资助项目(No.GCZX-A0903);广东高校科技成果转化项目(No.CGZHZD0803);广东省大气环境与污染控制重点实验室资助项目(No.2011A060901011)

摘要：	采用溶胶凝胶法制备4%Ag/Al2O3、4%Ag/10%TiO2-Al2O3催化剂.利用N2物理吸附、氮氧化物/二氧化硫程序升温脱附(NOx/SO2-TPD)以及普通/原位漫反射傅里叶变换红外光谱(FT-IR/DRIFTs)对催化剂进行表征,并探讨催化剂在含硫气氛前后选择性还原NOx活性的变化及中毒机理.结果表明在4%Ag/Al2O3催化剂中掺杂10%TiO2能提高催化剂的中低温活性以及在400℃下抗SO2中毒的能力.TiO2引入后可促进甲酸盐物种的形成从而有利于低温反应的进行;SO2与NO在同一活性位上出现的竞争吸附以及活性组分Ag的硫酸化是4%Ag/Al2O3催化剂失活的重要原因;TiO2的加入能促进NO在催化剂表面的吸附并能减弱其对SO2的吸附,同时能有效抑制活性组分Ag的硫酸化,从而提高催化剂的抗硫性.
关键词：	选择性催化还原 4%Ag/Al2O3 4%Ag/10%TiO2-Al2O3 SO2中毒吸附硫酸银
收稿时间：	2011/12/7 0:00:00
修稿时间：	2012/3/15 0:00:00
Deactivation of TiO₂-modified Ag/Al₂O₃ catalyst by SO₂ in the reduction of NO_x by propene

LIU Youf,OUYANG Jiehong,WANG Lishan,SU Yanxi,WU Junliang,FU Mingli,HUANG Bichun and YE Daiqi.Deactivation of TiO₂-modified Ag/Al₂O₃ catalyst by SO₂ in the reduction of NO_x by propene[J].Acta Scientiae Circumstantiae,2012,32(10):2524-2532.

Authors:	LIU Youf OUYANG Jiehong WANG Lishan SU Yanxi WU Junliang FU Mingli HUANG Bichun and YE Daiqi

Affiliation:	School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006;School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006;School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006;School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006;1. School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006;2. The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education, Guangzhou 510006;3. The Key Laboratory of Atmospheric Environment and Pollution Control of Guangdong Province, Guangzhou 510006;1. School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006;2. The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education, Guangzhou 510006;3. The Key Laboratory of Atmospheric Environment and Pollution Control of Guangdong Province, Guangzhou 510006;1. School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006;2. The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education, Guangzhou 510006;3. The Key Laboratory of Atmospheric Environment and Pollution Control of Guangdong Province, Guangzhou 510006;1. School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006;2. The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education, Guangzhou 510006;3. The Key Laboratory of Atmospheric Environment and Pollution Control of Guangdong Province, Guangzhou 510006

Abstract:

Keywords:	SCR 4%Ag/Al₂O₃ 4%Ag/10%TiO₂-Al₂O₃ sulfur poisoning adsorption silver sulfate
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