Role of iron-based catalysts in reducing NO_(x) emissions from coal combustion

作     者：Yuehua Liu Lili Chen Shoujun Liu Song Yang Ju Shangguan Yuehua Liu;Lili Chen;Shoujun Liu;Song Yang;Ju Shangguan

作者机构：State Key Laboratory of Clean and Efficient Coal UtilizationTaiyuan University of TechnologyTaiyuan 030024China Shanxi Engineering Center of Civil Clean FuelTaiyuan University of TechnologyTaiyuan 030024China College of Chemical Engineering and TechnologyTaiyuan University of TechnologyTaiyuan 030024China 

出 版 物：《中国化学工程学报:英文版》 (Chinese Journal of Chemical Engineering)

年 卷 期：2023年第59卷第7期

页      面：1-8页

核心收录：

学科分类：0710[理学-生物学] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by National Natural Science Foundation of China(21878210) Shanxi Provincial Science and Technology Achievement Transformation Guidance Special Program of China(202104021301052) Shanxi Province Patent Transformation Special Program Project(202202054) 

主　　题：NO_(x) Coal combustion Coal pyrolysis Fe2O3 catalyst 

摘      要：Nitrogen oxide(NO_(x))pollutants emitted from coal combustion are attracting growing public *** the traditional technologies of reducing NO_(x) were mainly focused on terminal treatment,and the research on source treatment is *** paper proposes a new coal combustion strategy that significantly reduces NO_(x) emissions during coal *** strategy has two important advantages in reducing NO_(x) ***,by introducing iron-based catalyst at the source,which will catalyze the conversion of coke nitrogen to volatile nitrogen during the pyrolysis process,thereby greatly reducing the coke nitrogen *** second is de-NO_(x) process by a redox reaction between NO_(x) and reducing agents(coke,HCN,NH_(3),etc.)that occurred during coke *** to direct combustion of coal,coke prepared by adding iron-based catalyst has 46.1% reduction in NO_(x) *** determine the effect of iron-based additives on de-NO_(x) performance,demineralized coal(de-coal)was prepared to eliminate the effect of iron-based minerals in coal *** effects of iron compounds,additive dosages,and combustion temperatures on de-NO_(x) efficiency are systematically *** results revealed that the NO_(x) emission of the coke generated by pyrolysis of de-coal loaded with 3%(mass)Fe_(2)O_(3) decreases to 27.3% at combustion temperature of 900℃.Two main reasons for lower NO_(x) emissions were deduced:(1)During the catalytic coal pyrolysis stage,the nitrogen content in the coke decreases with the release of volatile nitrogen.(2)Part of the NO_(x) emitted during the coke combustion was converted into N_(2) for the catalytic effect of the Fe-based *** is of great practical value and scientific significance to the comprehensive treatment and the clean utilization process of coal.