摘要
为制备高活性固体超强酸催化剂,改进了WO3/ZrO2固体超强酸的浸渍制备过程;用BET、XRD、NH3-TPD和SEM方法分别对以有、无醇化处理载体制得的催化剂进行了表征。结果表明,Zr(OH)4载体经醇化处理后,载体表面容纳较多的分散态钨活性组分,制得催化剂比表面积增大,高温焙烧后仍保持一定的四方晶相ZrO2(t),呈现出较高的总酸量和酸强度,且粒度较小,疏松分散,用于柴油催化氧化脱硫反应表现出较高的催化活性。
In order to prepare the solid superacid catalyst with higher catalytic activity, the common impregnation process for preparing WO3/ZrO2 solid superacid was improved. The catalysts prepared by using Zr（OH）4 supports with and without alcoholation separately were characterized by BET, XRD, NH3-TPD and SEM, respectively. The results reveal that more dispersive tungsten active component can be loaded on the Zr（OH）4 support treated with alcoholation, and the catalyst prepared with this support possesses larger specific surface area. Besides, in the catalyst prepared with this support, ZrO2 exists mainly in the tetragonal phase after calcination at high temperature, which causes the prepared WO3/ZrO2 superacid catalyst to present higher acidic strength and total acid amount. Moreover, the above catalyst prepared disperses in small particles and gives higher catalytic activity when it is used in the catalytic oxidative desulfurization of diesel.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2009年第4期667-672,共6页
Journal of Chemical Engineering of Chinese Universities
关键词
固体超强酸
浸渍法
载体
醇化处理
氧化钨
氧化锆
solid superacid
impregnation method
support
alcoholation
tungsten oxide
zirconium oxide
