摘要
研究两种不同制备方法──浸渍法和超临界流体干燥法制得的超细Ｍｏ／Ａｌ２Ｏ３催化剂的加氢与加氢脱硫催化性质及还原性质，并与以普通Ａｌ２Ｏ３作载体制得的Ｍｏ／Ａｌ２Ｏ３催化剂相比较．结果表明，超细粒子催化剂催化性质较大程度地受制备方法的影响．ＴＰＲ、ＸＲＤ、ＬＲＳ分析结果表明，超细氧化铝载体和超临界流体干燥法的使用均有利于Ｍｏ在Ａｌ２Ｏ３表面的分散．
The activities of hydrodesulfurization(HDS)and hydrogenation(HYD)for UFPAl2O3 catalysts prepared by two methods,impregnation and supercritical fluid drying process,were determined in a continuous flow microreactor. It is shown that the catalytic properties and the dispersion of Mo species on alumina surface are greatly affected by the preparation method,as compared to that of ordinary Mo/Al2O3(prepared by impregnating ordinary γ-Al2O3 with molybdenum salt),the HDS activities of UFP-Mo/Al2O3(prepared by implregnating UFP alumina with Mo salt)are considerably high under the same condition. So do the HYD activities. It is also indicated from TPR,LRS and XRD that the Mo loading at which bulk MoO3 phase emerge for UFP-Mo/Al2O3 is considerably higher than that for ordinary Mo/Al2O3 catalysts,implying that using UFP-Al2O3 and supercritical fluid drying process favor the dispersion of Mo species onto the surface of alumina.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第1期98-102,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
钼/氧化铝
还原性质
催化剂
超细
UFP-Mo/Al2O3,TPR,Reduction behavior,Hydrodesulfurization, Hydrogenation
