氮气吸附法和压汞法测定Al_2O_3载体孔结构

Nitrogen Adsorption Method and Mercury Injection Method Determination the Pore Structure of Alumina Carrier

作为催化剂载体的活性氧化铝,其孔径分布主要集中在中孔范围内,压汞法和氮气吸附法是测定多孔材料比表面积、孔径及其分布的经典方法,采用压汞仪和比表面积、孔径测定仪对活性氧化铝载体孔结构进行测定。氮气吸附法采用BET原理进行比表面积测定,采用BJH原理进行孔径分布和孔容的测定,压汞法采用Wasburn公式测定比表面、孔径分布和孔容。对两种方法实验结果进行了讨论,认为氮气吸附法更适合氧化铝载体孔结构的测定。

As a catalyst carrier, activated alumina, the pore size distribution mainly concentrated in the mesopore range, mercury injection method and nitrogen adsorption isotherms are classical method, to determine the specific surface area, pore size and its distribution of porous materials. Used mercury analyzer and specific surfacc area and pore size analyzer, to determinate the pore structure of activated alumina carrier. Nitrogen adsorption method, using the principle of BET, determinate specific surface area, Using BJH theory, determinate pore size distribution and pore volume. Mercury injection method, determinate specific surface area, pore size distribution and pore volume, using the Wasburn formula. Experimental results were discussed of two methods. It was thought; nitrogen adsorption method was more suitable for deten＇nination pore structure of alumina carrier.