用氮气吸附法研究高温变换催化剂表面分形维数  

Study on surface fractal dimensions of several high temperature shift catalysts by N_2 adsorption method

作　　者：刘怡[1] 魏灵朝[1] 崔卫星[1] 许芳[1] 

机构地区：[1]河南省化工研究所有限公司河南省化学催化重点实验室,河南郑州450052

出　　处：《天然气化工—C1化学与化工》2009年第6期31-34,共4页Natural Gas Chemical Industry

摘　　要：在77K下对ICI71-4、LB、B113-2、B113等4种高温变换催化剂进行N2吸附-脱附等温线测定,得到了孔结构参数,研究了不同催化剂的孔径分布、比表面积等孔结构变化,并利用等温吸附数据计算催化剂的分形维数。结果表明,4种催化剂均具有分形特性,分形维数在2～3之间,但其分形维数与比表面积和孔容积没有直接联系。Nitrogen adsorption isotherms of several high temperature shift catalysts, ICI71-4, LB, B113-2 and B113, were measured at 77 K, and their pore structure parameters were determined. The changes of pore size distribution, specific surface area of the different catalysts were studied, and the fractal dimensions were calculated out from the adsorption data. The results showed that the four catalysts all had fractal characteristics and their fraetal dimensions were in a range of 2-3, but there was no direct relationship between fractal dimensions and specific surface areas or pore volumes.

关 键 词：高温变换催化剂 孔结构 氮气吸附法 分形维数 

分 类 号：TQ138.11[化学工程—无机化工]