Adsorption and Desorption of Decane Using Non-Carbon Adsorbents

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2021-06-01 DOI:10.5572/ajae.2021.023

Jeongmin Park, Sang-Sup Lee

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Abstract

A high concentration of volatile organic compounds (VOCs) is emitted during dry cleaning processes. Although carbonaceous materials have been widely tested for the control of VOC emission, there is a risk of fire when a large amount of VOCs is contained. Non-carbon adsorbents such as KIT-6, SBA-15, MCM-41, X-type zeolites, Y-type zeolites, aluminum silicate, and activated alumina are therefore tested in this study for the adsorption and desorption of decane which is a main constituent of VOCs emitted during dry cleaning. The adsorbents were evaluated under two conditions with and without the injection of water vapor (20% rh) using a fixed-bed reactor system. Without the injection of water vapor, KIT-6 showed the highest decane adsorption capacity, and activated alumina showed the highest decane desorption efficiency. It was also found that the mesopore volume of the adsorbent was related to its decane adsorption capacity, whereas its peak pore diameter was closely related to its decane desorption efficiency. KIT-6 showed very similar decane adsorption and desorption performance in both cases with and without the injection of water vapor. However, the decane desorp-tion efficiency of activated alumina significantly decreased with the injection of water vapor.

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非碳吸附剂对癸烷的吸附和解吸

干洗过程中会排放出高浓度的挥发性有机化合物（VOC）。虽然碳质材料在控制挥发性有机化合物排放方面已进行了广泛测试，但当含有大量挥发性有机化合物时，存在火灾风险。因此，本研究测试了 KIT-6、SBA-15、MCM-41、X 型沸石、Y 型沸石、硅酸铝和活性氧化铝等非碳吸附剂对干洗过程中排放的挥发性有机化合物的主要成分癸烷的吸附和解吸。使用固定床反应器系统，在注入和不注入水蒸气（20% rh）的两种条件下对吸附剂进行了评估。在不注入水蒸气的情况下，KIT-6 的癸烷吸附能力最高，而活性氧化铝的癸烷解吸效率最高。研究还发现，吸附剂的中孔体积与其癸烷吸附能力有关，而其峰值孔径与其癸烷解吸效率密切相关。在注入水蒸气和不注入水蒸气的两种情况下，KIT-6 的癸烷吸附和解吸性能非常相似。然而，活性氧化铝的癸烷解吸效率随着水蒸气的注入而明显降低。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.