MnO_(x)-FeO_(x)/TiO_(2)低温SCR烟气脱硝催化剂制备及其脱硝性能  

Preparation and catalytic performance of MnO_(x)-FeO_(x)/TiO_(2)low temperature SCR De-NO_(x) catalyst

作　　者：褚昱昊 徐向亚[1] 刘晓玲[1] 刘红梅[1] 张明森[1] Chu Yuhao;Xu Xiangya;Liu Xiaoling;Liu Hongmei;Zhang Mingsen(SINOPEC Beijing Research Institute of Chemical Industry Co.,Ltd.,Beijing 100013,China)

机构地区：[1]中石化(北京)化工研究院有限公司,北京100013

出　　处：《工业催化》2023年第5期53-58,共6页Industrial Catalysis

摘　　要：采用浸渍法制备MnO_(x)-FeO_(x)/TiO_(2)低温脱硝催化剂粉体,考察锰铁含量对催化剂脱硝性能的影响。选取6Mn-4Fe/TiO_(2)粉体催化剂(Mn质量分数6%,Fe质量分数4%),考察挤出成型配方对条形催化剂孔结构的影响。比较成型前后催化剂脱硝性能及不同浓度SO_(2)下的抗中毒能力。采用XRD和N_(2)吸附-脱附对催化剂进行表征。结果表明,粉体催化剂6Mn-4Fe/TiO_(2)具有最佳的低温SCR脱硝活性,在空速18000 h^(-1),氨氮(氨气和一氧化氮)物质的量比1∶1,氧体积分数5%反应条件下,在(120~220)℃内能够保持100%的脱硝效率。在反应温度180℃,SO_(2)浓度300 mg·m^(-3)条件下具有优异的抗硫能力。且成型后,条形催化剂的活性温度窗口进一步拓宽,抗硫能力有所提高。MnO_(x)-FeO_(x)/TiO_(2)low temperature denitration catalyst powder was prepared by immersion method,and the effects of Mn-Fe contents on its catalytic performance were investigated.The effects of processing conditions on pore structure of extruded strip catalyst were studied base on 6Mn-4Fe/TiO_(2)catalyst powder(Mn mass fraction of 6%and Fe mass fraction of 4%).The denitrification performance and anti-poisoning ability under different SO_(2)contents were compared before and after extrusion.XRD and N_(2) adsorption-desorption were used to characterize catalysts.The results indicate that 6Mn-4Fe/TiO_(2)catalyst has the best low temperature SCR denitration activity.Within the scope of the(120-220)℃,denitration efficiency keeps 100%over 6Mn-4Fe/TiO_(2)catalyst when space velocity is 18000 h^(-1),ammonia nitric oxide molar ratio is 1∶1,volume fraction of O_(2)is 5%.The catalyst has excellent sulfur resistance under reaction temperature of 180℃and SO_(2)concentration of 300 mg·m^(-3).After forming,the active temperature window of the catalyst is widened and the sulfur resistance of the catalyst is improved.

关 键 词：催化剂工程 低温脱硝 浸渍法 挤出成型法 脱硝效率 抗硫 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学] X701[理学—化学]