K_2Ti_2O_5对汽车尾气中碳烟的催化氧化性能研究

Catalytic Oxidation of Soot in Exhaust of Diesel Engine Using K_2Ti_2O_5

通过溶胶凝胶法制备了K2Ti2O5催化剂,并利用XRD,SEM,BET等方法进行了表征。利用程序升温反应对K2Ti2O5的碳烟催化氧化性能进行了研究。结果表明,K2Ti2O5具有一定的碳烟催化氧化活性。同时,一定量的NOx有助于K2Ti2O5的催化氧化活性,说明K2Ti2O5是一种潜在的可同时去除NOx和碳烟的新型催化剂。由于K2Ti2O5对碳烟具有较高的催化氧化活性、较好的抗水性和低廉的价格,因此是一种具有较好发展前景的汽车尾气净化催化剂。

K2Ti2O5,which have a high crystallinity,were well prepared by sol-gel method.K2Ti2O5 were characterized by XRD,SEM,and BET surface area and found to have relatively high soot oxidation performance.Certain amount of NOx has positive influence on the performance of K2Ti2O5,implying that K2TiO5 may be a kind catalyst for simultaneous removal of NOx and soot.K2Ti2O5 may be an excellent candidate for soot oxidation due to its high oxidation activity,water-stability,and economical advantages.