NOx reduction against alkali poisoning over Ce(SO4)2-V2O5/TiO2 catalysts by constructing the Ce4+-SO42-pair sites

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外文摘要：Commercial V2O5-based catalysts have been successfully applied in NH3 selective catalytic reduction(NH3-SCR)of NOx from power stations,but their poor alkali-resistance restrains the wider application in nonelectrical industries.In this study,NOx reduction against alkali poisoning over V2O5/TiO2 is greatly improved via Ce(SO4)2 modification.It has been originally demonstrated that Ce4+-SO42-pair sites play crucial roles in improving NOx reduction against alkali poisoning over V2O5/TiO2 catalysts.The strong in-teraction between V species and Ce sites of Ce4+-SO42-pairs triggers the reaction between NH4+species and gaseous NO via Eley-Rideal(E-R)reaction pathway.After K-poisoning,the SO42-sites of Ce4+-SO42-pairs as protective sites strongly bond with K and thus maintain the high reaction efficiency via the E-R reaction pathway.This work demonstrates an effective strategy to enhance NOx reduction against alkali poisoning over catalysts via constructing Ce4+-SO42-pair sites,contributing to developing alkali-resistant SCR catalysts for practical application in nonelectrical industries.

外文关键词：

Air pollution controlSelective catalytic reductionNOx reductionAlkali poisoningCe(SO4)2

作者：

Shuangxi Li、Huijun Yu、Tianwei Lan、Liyi Shi、Danhong Cheng、Lupeng Han、Dengsong Zhang

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作者单位：

State Key Laboratory of Advanced Special Steel,School of Materials Science and Engineering,International Joint Laboratory of Catalytic Chemistry,College of Sciences,Shanghai University,Shanghai 200444,China

基金：

国家自然科学基金国家自然科学基金国家自然科学基金Shanghai Rising-Star ProgramChenguang Program supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission

项目编号：

22125604221061002197611722QA140370022Z00354

出版年：

2024

DOI：

10.1016/j.cclet.2023.108240

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(5)

参考文献量49