凹凸棒石低温SCR脱硝催化剂的研究进展

发布时间：2017-12-28 06:08

本文关键词：凹凸棒石低温SCR脱硝催化剂的研究进展　出处：《化工进展》2016年10期 　论文类型：期刊论文

【摘要】：选择性催化还原(SCR)脱硝技术是目前主流的氮氧化物脱除技术,其核心是催化剂。凹凸棒石成本低廉,性能优越,适合用作SCR催化剂的载体,而且以凹凸棒石为载体的催化剂显示出良好的低温选择性和稳定性,具有很好的应用前景。本文总结了凹凸棒石低温SCR脱硝催化剂的研究进展,阐述了活性组分、制备方法、前体物种、活性组分负载量、煅烧温度、元素掺杂等因素对催化剂脱硝活性的影响,同时简要介绍了导致此类催化剂失活的原因以及失活催化剂的再生方法,并指出在凹凸棒石负载型低温脱硝催化剂上进行的SCR脱硝反应遵循E-R机理,最后指出此类催化剂的未来研究方向主要是进一步提高现有催化剂的低温催化活性和抗中毒能力,实现工业化应用。
[Abstract]:Selective catalytic reduction (SCR) denitrification is the mainstream technology of nitrogen oxide removal at present, and its core is catalyst. Attapulgite is cheap and superior in performance. It is suitable for use as carrier of SCR catalyst. Moreover, attapulgite catalyst has good low temperature selectivity and stability, and has good application prospects. This paper summarizes the research progress of attapulgite SCR low-temperature denitration catalyst, expounds the active components, preparation methods, precursor species, active component loading, calcination temperature, doping and other factors influence the denitrification activity of catalysts, and catalyst regeneration methods lead to such cause of deactivation and the deactivation of the catalyst is briefly introduced, and pointed out that the load off type low temperature denitration catalyst on SCR denitrification reaction following E-R mechanism in attapulgite, finally points out the direction for future research of this kind of catalyst is mainly to further improve the catalytic activity of the catalyst and the anti poisoning ability, realize the industrial application.
【作者单位】：中国矿业大学(北京)化学与环境工程学院;华北科技学院;
【基金】：中央高校基本科研业务费项目(3142015091)
【分类号】：X773;TQ426
【正文快照】： 氮氧化物(NOx)除了对人体造成一次污染外,还会引起酸雨、光化学烟雾、雾霾等一系列污染,危害较大。NOx的最大来源是火力发电,其次是工业和交通运输部门。因此,燃煤电厂NOx减排成为现在大气污染治理的一个热点。在多种NOx减排技术中,选择性催化还原脱硝(SCR)技术因技术相对成熟

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