Removal characteristics of trace compounds of landfill gas by activated carbon adsorption

被引：134

作者：

Shin, HC ^{[1
]}

Park, JW ^{[1
]}

Park, K ^{[1
]}

Song, HC ^{[1
]}

机构：

[1] Yonsei Univ, Dept Chem Engn, Seoul 120749, South Korea

来源：

ENVIRONMENTAL POLLUTION | 2002年 / 119卷 / 02期

关键词：

landfill gas; adsorption; aromatics; chlorinated compounds; granular activated carbon;

D O I：

10.1016/S0269-7491(01)00331-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The removal characteristics of trace compounds and moisture in raw landfill gas (LFG) were studied. The LFG from the extraction well was saturated with water and moisture was eliminated by physical methods including cyclone-type dehydrator and compressor. The moisture removal efficiency of dehydrator and compressor was above 80%. As the moisture contents of LFG decreased, the toxic compounds like aromatics and chlorinated compounds were effectively removed by using the granular activated carbon. The breakthrough time and adsorption capacity of benzene, toluene, and ethyl benzene decreased rapidly when the relative humidity is over 60%. The effect of moisture was more pronounced at lower adsorbate concentrations tested than at higher concentrations. The breakthrough curves for multi-component mixtures show displacement effects. In the course of competing adsorption, adsorbates with strong interaction force to displace weakly bounded substances. Adsorption by activated carbon is in descending order of xylene, ethylbenzene, toluene, tri or tetrachloroethylene, benzene, carbon tetrachloride and chloroform in LFG, respectively. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：227 / 236

页数：10

共 19 条

[1] Trace organic compounds in landfill gas at seven UK waste disposal sites [J].