Adsorption of trace polar methy-ethyl-ketone and non-polar benzene vapors on viscose rayon-based activated carbon fibers

被引：74
|
作者：
Huang, ZH [1 ]
Kang, FY [1 ]
Zheng, YP [1 ]
Yang, JB [1 ]
Liang, KM [1 ]
机构：
[1] Tsing Hua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
来源：
CARBON | 2002年 / 40卷 / 08期
关键词：
activated carbon; adsorption; adsorption properties; surface properties;
D O I：
10.1016/S0008-6223(01)00292-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The adsorption of polar methy-ethyl-ketone (MEK) and non-polar benzene vapors on viscose rayon-based activated carbon fiber (ACF) was investigated. The pore texture and surface composition of ACF were characterized by nitrogen adsorption at 77 K and X-ray photoelectron spectroscopy (XPS), respectively. Gas adsorption on the samples was measured by the gravimetric method and the Dubinin-Radushkevich (DR) equation was used to fit the experimental adsorption isotherms. The experimental results show that ACF with different pore texture and surface composition exhibited different adsorption and desorption behavior for polar and non-polar vapors. The effect of adsorbate polarity on the adsorption capacity at lower concentrations was more significant in the case of adsorbents with a smaller surface area. It was found that evacuation treatment greatly increased the adsorption rate. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1363 / 1367
页数：5
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