%0 Journal Article
%T Pore structure effects on activated carbon adsorption behavior for toluene<br>活性炭孔隙结构在其甲苯吸附中的作用
%A Liu Wei
%A Li Liqing
%A Yao Xiaolong
%A Sun Zheng
%A Liu Zheng
%A <br>刘伟
%A 李立清
%A 姚小龙
%A 孙政
%A 刘峥
%J 环境工程学报
%D 2012
%I 
%X Four kinds of commercial activated carbon (AC) were chosen as the samples, the physical and chemical properties of the samples were characterized by nitrogen adsorption isotherms, scanning electron microscopy(SEM) and fourier transform infrared spectroscopy (FTIR). To explore effects of activated carbon pore structure on its adsorption properties, adsorption behaviour, surface coverage and adsorption energy, adsorption of toluene onto the chosen samples was investigated by the thermodynamic and kinetic methods at 298.15 K. The results showed that activated carbon surface area and pore volume were the main factors affecting its adsorption properties, there was a good linear relationship between toluene adsorptive capacity and activated carbon pore volume when aperture was 0.8 ~ 2.4 nm, and the linear slope increased with toluene concentration. Langmuir adsorption isotherm model and the quasi-first order kinetic equation were suitable for describing the experimental data of toluene on activated carbons. Pore structure was the major constraint of adsorption rate for toluene, specifically, during fast adsorption stage, adsorption rate was mainly restricted by micropore, at particles diffusion stage and the end stage, micropores, surface pore and mesopores, macropores was the main constraint on adsorption rate, respectively. Adsorption energy of these four kinds of activated carbon varied with the increase of specific surface area.
%K activated carbon
%K toluene
%K pore structure
%K correlation
%K adsorption kinetics<br>活性炭
%K 甲苯
%K 孔结构
%K 相关性
%K 吸附动力学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=92E6F4267FD4CBCB51B1E49E014D8054&jid=3567BD61129AA59043F5DE01F8815DB5&aid=66FD72374B2E351F48422A999CED51E7&yid=99E9153A83D4CB11&vid=B31275AF3241DB2D&iid=9CF7A0430CBB2DFD&sid=4A6E57A9C5ECD9DA&eid=FB716921F2C277AB&journal_id=1673-9108&journal_name=环境工程学报&referenced_num=0&reference_num=16