吸附
位阻效应
水溶液
大孔隙
解吸
活性炭
化学工程
材料科学
碳纤维
化学
碘
有机化学
复合材料
介孔材料
催化作用
工程类
复合数
出处
期刊:Carbon
[Elsevier]
日期:1975-01-01
卷期号:13 (5): 437-442
被引量:61
标识
DOI:10.1016/0008-6223(75)90016-0
摘要
Studies were conducted on the adsorption of iodine from saturated aqueous solutions and from saturated vapor by eight activated carbons of greatly diverse pore structures. Water adsorption data were used to determine the pore size distribution curves which provided both the distributions of the pore constriction (desorption) and cavity (adsorption) diameters. Adsorption from aqueous phase formed a unimolecular layer on the carbon surface while adsorption from saturated vapor produced pore-filling of micropores (pores less than 30 Å diameter) and surface coverage of the macropores. A great deal of steric interference was present because of the small difference in the diameter of iodine molecule (4.94 Å) relative to the 10–30 Å diameter pores. Good correlation was attained between adsorption and pore structure when corrections were made for the steric effect and the mean diameter distributions of the constrictions and cavities were used. The model for the iodine-on-carbon adsorption resembles packing of spheres into cylinders.
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