以钛板为骨架的SCR催化剂的制备研究及其性能测试

Preparation studyand performance test of SCR denitration catalyst with the skeleton of the titanium plate

选用钛板作为催化剂的骨架,以磷酸、聚乙烯醇为助剂,采用提拉法,在钛板表面制备二氧化钛涂层,再采用分步浸渍法制备催化剂。探索此方法下磷酸、聚乙烯醇加入量的变化及水粉比对二氧化钛涂层BET（比表面积）及耐磨性能的影响,优选出磷酸和聚乙烯醇的最佳添加量以及水粉比。按照实验得出的最优配比制备的催化剂BET值为10.57m2/g。浸渍活性成分后,通过烟气模拟实验,O2的质量分数保持在5%条件下制得催化剂在350~450℃之间的脱硝效率高于90%。

The titanium plate as the skeleton of the catalyst and phosphate and PVA as additives were selected.The preparing of the catalyst used the manner,which firstly preparing a titanium oxide coating on the surface of the titanium plate and impregnating the active ingredient.By examining the additive amount of phosphate and PVA affects the coating BET value and abrasion resistant,select the optimal addition amount.Then,the performance of the catalyst was examined by BET and the imitating the flue gas denitrification test.When O2content（mass fraction）in the flue gas were maintained at about 5%,the catalyst denitrification efficiency is higher than 90% between 350~450 ℃.