甲苯吸附与活性炭孔隙结构关系的研究  

Relationship Between Toluene Adsorption Capacity and Pore Structure of Activated Carbon

作　　者：刘伟[1] 李立清[1] 刘峥[1] 孙政[1] 姚小龙[1] 顾庆伟[1] 石瑞[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《化学工业与工程》2011年第4期5-10,21,共7页Chemical Industry and Engineering

基　　金：国家自然科学基金(20976200)

摘　　要：选用4种活性炭为吸附剂,7.537 g/m3甲苯为吸附质,在298.15 K下进行吸附试验,探讨了4种活性炭的甲苯吸附量与其比表面积和孔容的关系。对活性炭不同孔径区间的孔容和甲苯吸附量进行线性回归分析,并对分析结果进行显著性检验。结果表明:4种活性炭均具有微孔吸附特征;活性炭比表面积、孔容大则其甲苯吸附量大,活性炭孔径结构对甲苯吸附效果产生直接影响;孔径在0.8～2.4 nm之间的孔容和甲苯吸附量之间存在较好的线性关系,其线性相关度R最大。Characterization of four activated carbons（which were chosen from four companies） were tested by nitrogen adsorption,toluene adsorption experiments were carried out at the concentration 7.537 g/m^3,temperature 298.15 K.The adsorption of toluene can be correlated with pore volume and specific surface area of activated carbon.Linear-regression analysis between the pore volume of different aperture and the adsorption capacity for toluene was conducted and checked by linear correlation R.The results showed that： Nitrogen isotherm adsorption indicated that these four activated carbons all had microporous adsorption characteristics;both pore structure and specific surface area of activated carbon could directly influence toluene adsorption capacity,toluene adsorption capacity increased with pore volume and specific surface area of activated carbons.Linear relationship between pore volume and toluene adsorption capacity was obvious,and the linear dependency R was the biggest when aperture was 0.8—2.4 nm.

关 键 词：活性炭 甲苯吸附量 线性相关度 孔结构 分子直径 

分 类 号：O647.31[理学—物理化学]