摘要
采用kc-4.0型颗粒活性炭对甲苯、对二甲苯、乙酸甲酯、乙酸乙酯、乙醇、正丙醇进行吸附实验,研究挥发性有机物的物化性质与活性炭饱和吸附量之间的相关性。实验结果表明,活性炭对乙酸甲酯、乙醇和正丙醇的吸附性能较差,对乙酸乙酯、甲苯和对二甲苯的的吸附性能较好,饱和吸附量最大的是甲苯(达312.92m g/g),饱和吸附量最小的是乙酸甲酯(为224.93m g/g)。6种挥发性有机物的吸附等温线用Langm u ir方程进行拟合,效果良好。挥发性有机物的比蒸发速度、饱和蒸气压和电离势能与活性炭饱和吸附量具有显著的相关性。比蒸发速度越快、饱和蒸气压越高或电离势能越大,活性炭饱和吸附量越小。
The correlation between physicochemical properties of volatile organic compounds and saturation adsorption capacity of activated carbon was studied through the experiments of adsorbing toluene, p-xylene, methyl acetate, ethyl acetate, ethanol and propylalcohol on granular activated carbon kc-4.0. The experimental results indicate that： The adsorption capabilities of activated carbon for ethyl acetate, toluene and p-xylene are better than those for methyl acetate, ethanol and propylalcohol; The saturation adsorption capacity for toluene is the largest （with 312.9 rag/g） and that for methyl acetate is the least （ with 224.93 rag/g）. The adsorption isotherms of the 6 VOCs are in accord with Langmuir equation. The specific evaporation rate, saturated vapour pressure and ionization potential of VOCs significantly correlate with the saturation adsorption capacity of activated carbon. The more the specific evaporation rate and the saturated vapour pressure or the ionization potential are, the less the saturation adsorption capacity of activated carbon is.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第5期409-412,共4页
Environmental Protection of Chemical Industry
关键词
挥发性有机物
活性炭
饱和吸附量
相关性
volatile organic compound
activated carbon
saturation adsorption capacity
correlation
