文献类型：期刊文献

中文题名：SO_2对NO催化氧化过程的影响(Ⅱ)载体γ-Al_2O_3与SO_2的相互作用

英文题名：Effect of SO_2 on NO Catalytic Oxidation(Ⅱ) Interaction Betweenγ-Al_2O_3 Support and SO_2

作者：李平[1];赵越[1];卢冠忠[1];赵秀阁[2];鲁文质[2];肖文德[2]

机构：[1]华东理工大学工业催化研究所;[2]华东理工大学联合反应工程研究所,上海200237

年份：2001

卷号：22

期号：12

起止页码：2072

中文期刊名：高等学校化学学报

外文期刊名：Chemical Journal of Chinese Universities

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金九五重点项目 (批准号 :2 96 330 30 )资助

语种：中文

中文关键词：NO;催化氧化;SO2;γ-Al2O3;催化剂;失活;废气处理;二氧化硫;载体;负载型催化剂;氧化硅;一氧化氮

外文关键词：Catalytic oxidation of NO; Effect of SO\-2; \%γ\%\|Al\-2O\-3; Deactivation of catalyst

摘要：考察了 4 2 3K时 SO2 在γ-Al2 O3上反复作用对 NO氧化过程的影响 .结果显示 ,SO2 的存在在一段时间内促进了γ-Al2 O3对 NO的催化氧化 .用 TPD,FTIR,XRD,BET及固体酸度测定等多种表征讨论了γ-Al2 O3和 SO2 之间的相互作用 .研究表明 ,SO2 在 γ-Al2 O3表面与 NO等吸附物结合形成活性吸附物种是γ-Al2 O3在 SO2 气氛中显示氧化活性的重要原因 ,但当其表面被强吸附的 SO2 逐步覆盖后 。
The effect of SO\-2 on the catalytic oxidation of NO over \%γ\%\|Al\-2O\-3 support was studied at temperature of 423 K. It was found that the activity of \%γ\%\|Al\-2O\-3 for the oxidation of NO to NO\-2 was enhanced temporarily in the presence of SO\-2. The adsorption capacity of NO and SO\-2 was also promoted by each other. The interaction between \%γ\%\|Al\-2O\-3 and SO\-2 was discussed by using of various material characterization techniques such as TPD, FTIR, XRD, BET, solid acid detection and so on. After long time reaction in the presence of SO\-2, no solid nitrate and sulfate were detected in \%γ\%\|Al\-2O\-3, but the L\|acid and B\|acid concentrations were increased. TPD spectra show that the desorption peak of NO\-2 species in the range of higher temperatures mounts up after SO\-2 co\|adsorption with NO and O\-2 on \%γ\%\|Al\-2O\-3. FTIR results indicate that different kinds of adsorption species are present on the surface of \%γ\%\|Al\-2O\-3 and the main NO adsorption species are changed by SO\-2 co\|adsorption. An active surface species, which may be responsible for the higher oxidation activity of \%γ\%\|Al\-2O\-3 in the presence of SO\-2, is supposed to be formed on the surface of \%γ\%\|Al\-2O\-3 \%via\% SO\-2, NO, O\-2 and surface\|adsorbed hydroxide. The activity of \%γ\%\|Al\-2O\-3 decreases while the surface of \%γ\%\|Al\-2O\-3 is covered gradually by a strong adsorption of SO\-2.