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首页> 外文期刊>Environmental Science & Technology >Chemically Treated Activated Carbon Cloths for Removal of Volatile Organic Carbons from Gas Streams: Evidence for Enhanced Physical Adsorption
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Chemically Treated Activated Carbon Cloths for Removal of Volatile Organic Carbons from Gas Streams: Evidence for Enhanced Physical Adsorption

机译：化学处理的活性炭布，用于去除气流中的挥发性有机碳：增强物理吸附的证据

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摘要

The micropore surfaces of activated carbon cloths (ACCs) have been chemically modified by introducing controlled amounts of nitrogen, oxygen, or chlorine on the surface of the micropores. The treatments with ammonia, oxidative reagents, or chlorine produce surfaces that are basic, acidic, and polar, respectively. The modified ACCs were evaluated for removal of several different volatile organic compounds (VOCs) in the 10—1000 ppmv concentration range. VOCs examined included acetaldehyde, acetone, and benzene. Acetaldehyde adsorption capacity increased by 500% with oxidized ACC surfaces as compared to untreated ACC surfaces. Acetone adsorption was also enhanced by 350% on oxidized surfaces. The level of benzene uptake was high with most all of the treated surfaces. Thermal regeneration of the ACCs at 100℃ was sufficient to desorb each of the three VOCs without any decrease in the adsorption capacity of the treated ACCs.
机译：活性炭布（ACC）的微孔表面已通过在微孔表面上引入受控量的氮，氧或氯进行了化学修饰。用氨水，氧化剂或氯气处理的表面分别为碱性，酸性和极性。评估了改性ACC在10-1000 ppmv浓度范围内的几种不同挥发性有机化合物（VOC）的去除。检查的VOC包括乙醛，丙酮和苯。与未处理的ACC表面相比，氧化的ACC表面的乙醛吸附能力提高了500％。丙酮在氧化表面上的吸附也增强了350％。在大多数处理过的表面上，苯的吸收水平很高。 100℃时ACC的热再生足以解吸三种VOC中的每一种，而处理后的ACC的吸附能力没有任何下降。

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