title: Adsorption of benzene, cyclohexane and hexane on ordered mesoporous carbon.
abstract: Ordered mesoporous carbon (OMC) with high specific surface area and large pore volume was synthesized and tested for use as an adsorbent for volatile organic compound (VOC) disposal. Benzene, cyclohexane and hexane were selected as typical adsorbates due to their different molecular sizes and extensive utilization in industrial processes. In spite of their structural differences, high adsorption amounts were achieved for all three adsorbates, as the pore size of OMC is large enough for the access of these VOCs. In addition, the unusual bimodal-like pore size distribution gives the adsorbates a higher diffusion rate compared with conventional adsorbents such as activated carbon and carbon molecular sieve. Kinetic analysis suggests that the adsorption barriers mainly originated from the difficulty of VOC vapor molecules entering the pore channels of adsorbents. Therefore, its superior adsorption ability toward VOCs, together with a high diffusion rate, makes the ordered mesoporous carbon a promising potential adsorbent for VOC disposal.
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: wgbift@126.com. Electronic address: wgbift@126.com.
authors: Gang
authors: G
authors: Wang
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: wgbift@126.com.
authors: Baojuan
authors: B
authors: Dou
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: wgbift@126.com.
authors: Zhongshen
authors: Z
authors: Zhang
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: wgbift@126.com.
authors: Junhui
authors: J
authors: Wang
authors: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
authors: Haier
authors: H
authors: Liu
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. E-mail: wgbift@126.com. Electronic address: zpinghao@rcees.ac.cn.
authors: Zhengping
authors: Z
authors: Hao
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control*; D001554:Benzene / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D003510:Cyclohexanes / Q000737:chemistry*; D004058:Diffusion; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006586:Hexanes / Q000737:chemistry*; D007700:Kinetics; D016062:Porosity
chemical_list: D000393:Air Pollutants; D003510:Cyclohexanes; D006586:Hexanes; C026385:n-hexane; C506365:Cyclohexane; D002244:Carbon; D001554:Benzene
keywords: Adsorption; Isosteric heat of adsorption; Knudsen diffusion; Ordered mesoporous carbon; Volatile organic compounds