摘要
NH3选择性催化还原（NH3-SCR）氮氧化物可有效减少固定源NOx的排放,目前,工业上应用的钒钛体系催化剂活性窗口温度为（300～400）℃,不能用于低温脱硝,开发低温NH3-SCR烟气脱硝催化剂成为研究热点之一.采用浸渍法制备M（0.1） Mn（15）/Hβ（M=Ni、Fe、Mg、Ca、Sr,0.1为M与Mn物质的量比）系列催化剂.通过X射线衍射、扫描电子显微镜和H2-程序升温还原反应等方法对催化剂进行表征,在固定床微型反应器上考察催化剂NH3选择还原NO的催化性能.结果表明,加入金属助剂Ni,催化剂活性得到改善,反应温度降低,T85和T95分别为157℃和171℃.
NH3-selective catalytic reduction （NH3-SCR） can effectively reduce emissions of NOx from stationary sources. Current commercial V-Ti system catalysts which possess the active temperature range （300 -400） ℃ cant be used in low temperature DeNOx. Developing catalysts using in flue gas DeNOx at low temperature has become a hotspot. M （0.1） Mn （ 15 ）/HI5 catalysts （ M = Ni, Fe, Mg, Ca, Sr, M/Mn molar ratio = 0.1 ） were prepared by impregnation method. The catalysts were characterized by XRD, SEM and Hz-TPR. The catalytic activity of the catalysts for selective catalytic reduction of nitrogen oxide with NH3 was investigated in a micro-reactor. The results showed that Ni （0.1）Mn （15）/Hβ catalyst has the best activity and the reaction temperature decreased. Tss and T95 were 157 ℃ and 171 ℃ ,respectively.
出处
《工业催化》
CAS
2014年第3期221-224,共4页
Industrial Catalysis
基金
北京市属高等学校人才强教计划(PHR20110517)资助项目
北京市大学生研究训练计划(2013J00014)资助项目
