化工进展2019，Vol.38Issue(3)：1411-1418,8.DOI:10.16085/j.issn.1000-6613.2018-0554
涂层组分对堇青石脱硝催化剂性能的影响
Performance of structured cordierite catalysts with different coatings for NH3-SCR
摘要
Abstract
In order to explore the influence of coating components on the performance of monolithic SCR denitration catalysts, manganese oxide (MnOx), oxides (TiO2, SiO2, and Al2O3) coatings and Honeycomb Cordierite (CC) substrate were selected to prepare structured coating catalysts, and the firmness and the denitrification activity of the catalysts were investigated. The denitration results showed that, for MnOx/Al2O3/CC catalysts, the denitrification efficiency at 200℃ was up to 95％ when MnOxloading amount was6％. The efficiency was about 75％ for MnOx/TiO2/CC as the loading was from 6％ to 12％ and it was 80％with 12％ loading for the MnOx/SiO2/CC. The sample firmness was in the order: MnOx/Al2O3/CC>MnOx/SiO2/CC>MnOx/TiO2/CC. Through BET, SEM, TG, Raman, H2-TPR and other analysis methods, it was found that the differences between the state of active component MnOxand the performance of the carrier were the main influence factors on the performance of catalysts. The Al2O3 coating had moderate specific surface area, and showed good activity as carrier. SiO2 coating had high specific surface area and good firmness, but it acted poorly as carrier. TiO2 had relatively small specific surface area, and the solvent evaporation in the sol was fast, resulting in an uneven coating surface uneven.关键词
选择催化还原/催化剂/载体/锰氧化物/溶胶凝胶法Key words
selective catalytic reduction/catalyst/support/manganese oxidex/sol-gel method分类
化学化工引用本文复制引用
金其奇,谢峻林,李凤祥,齐凯,方德,何峰..涂层组分对堇青石脱硝催化剂性能的影响[J].化工进展,2019,38(3):1411-1418,8.基金项目
国家重点研发计划专项(2017YFB0304304) （2017YFB0304304）
