Removal of VOCs from humidified gas streams using activated carbon cloth
Removal of VOCs from humidified gas streams using activated carbon cloth
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DOI：
10.1016/0950-4214(96)00004-7
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发表时间：
1996-06-01
期刊：
影响因子：
--
通讯作者：
Larson, SM
中科院分区：
文献类型：
--
作者：
Cal, MP;Rood, MJ;Larson, SM
研究了相对湿度（RH）对活性炭布（ACC）吸附可溶性（丙酮）和不溶性（苯）挥发性有机物（VOCs）的影响。重量天平与气相色谱/质谱联用，以确定ACC样品上吸附的水和VOC的单独量。RH值从0到90%和有机物浓度从350到1000 ppmv进行了检查。即使在90%RH下，气流中沿着丙酮（350和500 ppmv）的水蒸气的存在对丙酮的吸附容量也几乎没有影响。气流中的水蒸气对苯的吸附容量（500 ppmv）影响不大，直到约65%RH，此时苯的吸附容量随着RH的增加而迅速下降。该RH也是关于水蒸气在ACC孔内发生毛细冷凝的地方。水蒸气在ACC孔内冷凝，使其不能用于苯吸附。增加苯浓度可以对吸附的水蒸气的量具有显著影响。在86%RH和500 ppmv下，吸附284 mg/g水，而在86%RH和1000 ppmv下，仅吸附165 mg/g水。随着气流中苯浓度的降低，水蒸气对苯吸附的抑制作用增强。版权所有（C）1996 Elsevier Science Ltd
This research investigates the effects of relative humidity (RH) on the adsorption of soluble (acetone) and insoluble (benzene) volatile organic compounds (VOCs) with activated carbon cloths (ACC). A gravimetric balance was used in conjunction with a gas chromatograph/mass spectrophotometer to determine the individual amounts of water and VOC adsorbed on an ACC sample. RH values from 0 to 90% and organic concentrations from 350 to 1000 ppmv were examined. The presence of water vapor in the gas-stream along with acetone (350 and 500 ppmv) had little effect on the adsorption capacity of acetone even at 90% RH. Water vapor in the gas stream had little effect on: the adsorption capacity of benzene (500 ppmv) until about 65% RH, when a rapid decrease resulted in the adsorption capacity of benzene with increasing RH. This RH was also about where capillary condensation of water vapor occurs within ACC pores. Water vapor condenses within the ACC pores, making them unavailable for benzene adsorption. Increasing benzene concentration can have a significant effect on the amount of water vapor adsorbed. At 86% RH and 500 ppmv, 284 mg/g water was: adsorbed, while at 86% RH and 1000 ppmv, only 165 mg/g water was adsorbed. Water vapor was more inhibitory for benzene adsorption as benzene concentration in the gas stream decreased. Copyright (C) 1996 Elsevier Science Ltd