阴离子对γ-Al_2O_3外表面的化学修饰

Anion to the Chemical Modification Of External Surface of γ-Al_2O_3

用硅酸乙酯溶液和氯化铁溶液浸渍的方法对γ－Al2O3外表面进行化学修饰，用比表面积测量仪和四氯化碳吸附法测量了比表面积及比孔客，用常压微反色谱连用装置评价了催化剂在甲醇脱水反应中的催化性能．结果表明，不同焙烧温度、不同浸渍条件对γ－Al2O3的表面结构及催化性能具有一定的影响．

The external sudece of γ-Al_2O_3 was chemically modified by pickling process of tetraethyl silicate and ammoniumfluoride .The specific surface area and pore volume were measured by area koniogravimeter and CCl4 adsorption,and the catalyticactivity in the dehydration of methanol was studied through microactivity test. The results indicate that buming temprature anddeposited conduction influnce the surface structure and catalytic activity.