碱改性活性炭对VOCs的吸附性能

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英文篇名：Adsorption performance of alkali modified activated carbon to VOCs 作者：陈益清 ; 高晓洋 ; 伍健威 ; 张向京 英文作者：CHEN Yiqing;GAO Xiaoyang;WU Jianwei;ZHANG Xiangjing;School of Architectural and Environmental Engineering,Shenzhen Polytechnic;Hebei Hong Shun Wang Ji Environmental Technology Co.Ltd.;School of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology; 关键词：活性炭 ; 改性 ; 吸附 ; 脱附 ; 挥发性有机化合物 英文关键词：activated carbon;;modi?cation;;adsorption;;desorption;;volatile organic compounds(VOCs) 中文刊名：化工环保 英文刊名：Environmental Protection of Chemical Industry 机构：深圳职业技术学院建筑与环境工程学院;河北宏顺旺吉环保科技有限公司;河北科技大学化学与制药工程学院; 出版日期：2019-01-14 10:25 出版单位：化工环保 年：2019 期：02 基金：深圳市科技研发资金项目(JCYJ20150630114140637,JCYJ20160331113033413);; 河北科技大学科学治霾及大气污染防治重点攻关预研专项(XL-2017-008) 语种：中文; 页：92-97 页数：6 CN：11-2215/X ISSN：1006-1878 分类号：X701

摘要

选用3种经氢氧化钠改性的活性炭,研究了其对4种代表性VOCs(丁酮、乙酸乙酯、甲苯和四氯化碳)的吸附规律。结果表明:活性炭经碱改性后吸附性能有较大改善,吸附量的大小与其比表面积呈正相关性,而其比表面积多为微孔提供;改性活性炭对有机气体的吸附以物理吸附为主;吸附质的相对分子质量、密度、熔点与其在改性活性炭上的吸附量具有线性相关性,而沸点、饱和蒸气压、分子动力学直径则与吸附量无明显相关性;对于同一吸附剂,170℃再生时的性能最好,130℃次之,210℃最差。
        Three kinds of activated carbons modified by sodium hydroxide were used to study their adsorption performances to 4 representative VOCs,such as butanone,ethyl acetate,toluene and carbon tetrachloride. The results showed that:The adsorption performance of alkali modi?ed activated carbon was greatly improved,and there was a positive correlation between the adsorption capacity and the speci?c surface area of the activated carbon,which was mainly provided by the micropores;The adsorption of organic gases on the modified activated carbon was mainly physical adsorption;The adsorption capacity of the adsorbent had a linear correlation with the molecular weight,density and melting point of the adsorbate,while a poor correlation was presented with the boiling point,saturated vapor pressure and molecular dynamics diameter of the adsorbate;For the same adsorbent,170 ℃ was the suitable regeneration temperature,then 130 ℃,and 210 ℃ gave the unsatisfactory result.

引文

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