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用高真空重量法测定了20—200℃范围内,ZSM-35佛石对水和苯的吸附等温线。讨论了Langmuir,BET理论和微孔体积填充理论对ZSM-35—H_2O体系的适用性,提出了用Pickett三参数方程描述沸石—蒸气体系吸附平衡,确定沸石表面积及用W_0=10~(-4)·S·n＇·t式计算沸石微孔体积的方法。在ZSM-35—H_2O体系具有特征曲线温度不变性的基础上,给出了该体系吸附平衡方程θ=exp[-(A/3800)~(1.1)],并由此外推计算了吸附等温线和确定了沸石的孔体积。结果表明,ZSM-35沸石的比表面积为375m~2/g,微孔体积为0.158ml/g。
High-vacuum gravimetric method was used to determine the adsorption isotherms of ZSM-35 on water and benzene in the temperature range of 20-200 ℃. The applicability of Langmuir, BET theory and micropore volumetric packing theory to ZSM-35-H 2 O system was discussed. A three-parameter Pickett equation was proposed to describe the adsorption equilibrium of zeolite-steam system. The surface area of zeolite was determined and the surface area of zeolite- ) · S · n · · t-type calculation of zeolite micropore volume method. Based on the invariance of characteristic temperature in ZSM-35-H 2 O system, the adsorption equilibrium equation θ = exp [- (A / 3800) ~ (1.1)] of the system is given and the adsorption isotherm And the pore volume of the zeolite was determined. The results showed that zeolite ZSM-35 has a specific surface area of 375m 2 / g and a micropore volume of 0.158ml / g.