尿素掺氮与KOH活化对污泥炭催化活性研究  

Study on Catalytic Activity of Urea Mixed with Nitrogen and KOH Activation for Sludge Carbon

作　　者：季鸿先 Ji Hongxian(Shanghai SMI Wastewater Treatment Co.,Ltd.,Shanghai,201203)

机构地区：[1]上海城投污水处理有限公司,上海201203

出　　处：《当代化工研究》2025年第1期64-66,共3页Modern Chemical Research

摘　　要：以市政污泥为原料、尿素为氮源制备污泥炭,开展常温催化氧化NO脱硝实验,探究尿素掺氮与KOH活化对污泥炭催化活性的影响。确定KOH最佳添加比例和尿素最佳添加时段;制备了700℃下在炭化、活化中、活化后3个不同时段掺氮及不同KOH添加比例的污泥炭。结果表明:在温度为700℃、污泥与KOH比例为3:1时,炭化阶段掺氮制得样品NCK*(3:1)-7,表现出最高的脱硝效率为54.7%,较未添加KOH污泥炭提高18.3%;尿素掺氮与KOH活化在污泥热解过程中相互影响;尿素与KOH均通过增大材料比表面积、丰富孔隙结构来提高催化性能。Municipal sludge was used as raw material and urea was used as nitrogen source to prepare sludge carbon.NO denitrification by catalytic oxidation at room temperature was carried out to explore the influence of urea nitrogen doping and KOH activation on the catalytic activity of sludge carbon.The best addition ratio of KOH and the best addition time of urea were determined.Sludge carbon was prepared at 700℃after car-bonization and activation,which was doped with nitrogen and with different KOH addition ratio.The results showed that the sample NCK*(3:1)-7 was prepared at 700℃with sludge and KOH ratio of 3:1 and nitrogen doping in the carbonization stage,showing the highest denitrification efficiency of 54.7%,which was 18.3%higher than that of sludge carbon without KOH;Urea nitrogen doping and KOH activation affect each other during sludge py-rolysis;Both urea and KOH can improve the catalytic performance by increasing the specific surface area and enriching the pore structure.

关 键 词：污泥炭 催化 掺氮 KOH 尿素 

分 类 号：X701[环境科学与工程—环境工程]