High efficiency removal of NO using waste calcium carbide slag by facile KOH modification

作     者：Fang Wang Hui Li Jiyun Gao Na Geng Enzhu Jiang Futing Xia Mingwu Xiang Lijuan Jia Ping Ning Fang Wang;Hui Li;Jiyun Gao;Na Geng;Enzhu Jiang;Futing Xia;Mingwu Xiang;Lijuan Jia;Ping Ning

作者机构：School of Chemistry and EnvironmentYunnan Minzu UniversityKunming 650504China Faculty of Environmental Science and EngineeringKunming University of Science and TechnologyKunming 650500China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2024年第139卷第5期

页      面：182-192页

核心收录：

学科分类：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）] 07[理学] 08[工学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the National Natural Science Foundation of China(No.51968075) the Scientific Research Fund project of Yunnan Education Department(Nos.2022J0441 and 2022J0442) 

主　　题：Waste Carbide slag KOH Effective denitration 

摘      要：Waste calcium carbide slags(CS),which are widely applied to desulfurisation,are not typically used in ***,to well achieve waste control by waste,a facile and highefficiency denitration strategy is developed using KOH to modify the calcium carbide slags(KCS).Various KCS samples were investigated using a series of physical and chemical *** performance test results showed that the KOH concentration and reaction temperature are the main factors affecting the denitration efficiency of KCS,and CS modified with 1.5 mol/L KOH(KCS-1.5)can achieve 100% denitration efficiency at 300℃.Such excellent removal efficiency is due to the catalytic oxidation of the oxygen-containing functional groups derived from the *** studies showed that KOH treatment significantly increased the concentration of oxygen vacancies,nitro compounds,and basic sites of *** study provides a novel strategy for the resource utilisation of waste CS in the future.