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在催化剂物理吸附的研究中,由于受Keluin公式应用的限制,当多孔物质的孔径小于15A时就无法用传统的等温线方法处理数据。具有均一微孔结构(一般小于10A)的分子筛就属于这一类物质。 1964年起荷兰J.H.de Boer等人以及其后美国的K.S.W.Sing等发展的层厚法,能够使吸附过程中的微孔充填,过渡孔的多分子吸附以及毛细凝聚现象由层厚图上清晰地反映出来。特别对微孔物质可从层厚图上定量地求出微孔体积。R.L.Mieville据此研究了有硅胶存在时沸石分子筛微孔体积的测定,Marvin F.LJohnson用层厚法根据催化剂中沸石分子筛的面积测定微孔物质的含量,从而为研究
In the study of physical adsorption of catalysts, due to the limitation of the Keluin formula, the data can not be processed by traditional isotherm method when the pore size of porous material is less than 15A. Molecular sieves with a uniform microporous structure (typically less than 10 A) belong to this category. Since 1964, the layer thicknesses developed by JHde Boer et al. In the Netherlands and KSWSing in the United States have enabled the micropore filling in adsorption process, the multi-molecular adsorption of transitional pores and the capillary condensation phenomenon to be clearly defined Reflected. Especially for microporous material, the micropore volume can be obtained quantitatively from the layer thickness diagram. R.L.Mieville accordingly to study the presence of silica gel zeolite micropore volume determination, Marvin F.Lohnson by layer thickness method according to the catalyst zeolite molecular sieve area determination of microporous material, which for the study