A comprehensive review of deactivation and modification of selective catalytic reaction catalysts installed in cement kilns  

作　　者：Yang Zheng Yi Xing Guoliang Li Jiajia Gao Rui Li Qi Liu Tao Yue 

机构地区：[1]School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Journal of Environmental Sciences》2025年第2期451-467,共17页环境科学学报(英文版)

基　　金：supported by the Basic Research Business Fund Grant Program for University of Science and Technology Beijing (No.0650);the Fundamental Research Funds for the Central Universities (No.FRF-TP-22-091A1);the Interdisciplinary Research Project for Young Teachers of USTB (Fundamental Research Funds for the Central Universities) (No.FRF-IDRY-22-010).

摘　　要：After the ultralow emission transformation of coal-fired power plants,cement production became China’s leading industrial emission source of nitrogen oxides.Flue gas dust contents at the outlet of cement kiln preheaters were as high as 80-100 g/m^(3),and the calcium oxide content in the dust exceeded 60%.Commercial V_(2)O_(5)(-WO_(3))/TiO_(2) catalysts suitable for coal-fired flue gas suffer from alkaline earth metal Ca poisoning of cement kiln flue gas.Recent studies have also identified the poisoning of cement kiln selective catalytic reaction(SCR)catalysts by the heavy metals lead and thallium.Investigation of the poisoning process is the primary basis for analyzing the catalytic lifetime.This review summarizes and analyzes the SCR catalytic mechanism and chronicles the research progress concerning this poisoning mechanism.Based on the catalytic and toxification mechanisms,it can be inferred that improving the anti-poisoning performance of a catalyst enhances its acidity,surface redox performance-active catalytic sites,and shell layer protection.The data provide support in guiding engineering practice and reducing operating costs of SCR plants.Finally,future research directions for SCR denitrification catalysts in the cement industry are discussed.This study provides critical support for the development and optimization of poisoning-resistant SCR denitrification catalysts.

关 键 词：Cement Flue Gas NH_(3)-SCR CaO Poisoning Mechanism Anti-poisoning Modification 

分 类 号：X701[环境科学与工程—环境工程]