摘要
介绍了一种新型气体吸附测量装置.该装置利用压差法测量,采用美国MKS高精度压差传感器来提高测量精度,通过微调泄漏阀控制极小进气量,并且采用间断法与连续法相结合.实验证明,该装置具有很好的可重复性,能获得高分辨率及超低压吸附等温线.
The adsorption isotherm of a catalyst powder contains information on its surface area, pore volume, pore size distribution, pore shape, and surface heterogeneity. A popular technique used to measure adsorption isotherms is volumetric adsorption manometry, but the present apparatuses have some defects： （1） the isotherm is a few （ca 20） points; （2） the dosing manifold is refilled many times in measuring an isotherm, and the errors are accumulative; （3） the very low pressure （〈 133 Pa） region isotherm cannot be measured. This work introduces a new principle of measurement to overcome these defects.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2006年第3期200-202,共3页
基金
Supported by the National High Technology Research and Development Programof China(2003AA302630)and NationalNatural Science Foundation of China(20236020,20273036).
关键词
表面积
吸附等温线
孔径分布
微孔材料
碳纳米管
surface area
adsorption isotherm
pore size distribution
microporous material
carbon nanotube
