以TiO_(2)为载体的锰铈系低温SCR脱硝催化剂抗硫抗水性能研究进展  

SO_(2) and H_(2)O poisoning resistance of TiO_(2) supported Mn/Ce catalysts for low-temperature selective catalytic reduction of NO_(x)

作　　者：闫东杰 郭通 玉亚 陈兆辉 李亚静 YAN Dongjie;GUO Tong;YU Ya;CHEN Zhaohui;LI Yajin(Shaanxi Key Laboratory of Environmental Engineering,College of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an,710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西省环境工程重点实验室,西安710055

出　　处：《环境化学》2022年第1期352-364,共13页Environmental Chemistry

基　　金：陕西省重点研发计划项目(2020SF-432)资助.

摘　　要：开发具有低温、高活性、高抗硫抗水性的NH_(3)-SCR脱硝催化剂成为目前广大学者的主要研究方向。锰铈催化剂因为其优异的低温活性而具有广阔的应用前景,但反应气氛中的SO_(2)和H_(2)O会使催化剂中毒。本文分析了以TiO_(2)为载体的锰铈基催化剂在低温氨选择性催化还原过程中SO_(2)和H_(2)O的中毒机理,重点从添加助剂和改变催化剂形貌两方面介绍了提高锰铈催化剂抗硫抗水性的研究进展。最后针对目前锰铈催化剂存在的问题对其研究方向进行了展望。The development of NH_(3)-SCR denitration catalyst with desirable properties,including low-temperature,high activity,high sulfur and water resistance,has gradually become the primary research focus.Mn-Ce catalyst exhibited broad application potential due to its excellent catalytic activity under low-temperature.However,SO_(2) and H_(2)O in the reaction atmosphere usually causes-poison the catalyst.This manuscript proposed the SO_(2) and H_(2)O poisoning mechanism of TiO_(2) supported Mn-Ce catalyst during the low-temperature ammonia selective catalytic reduction process.Research tendency,about intensification of the sulfur and water resistance of the Mn-Ce catalyst through additive addition and morphology tuning of the catalyst,were carefully proposed,respectively.Finally,the research tendency with respect to the current Mn-Ce/TiO_(2) catalyst is prospected.

关 键 词：锰铈脱硝催化剂 低温SCR 抗硫抗水性 掺杂改性 氮氧化物 

分 类 号：X701[环境科学与工程—环境工程]