改性活性炭吸附二氯乙烷性能  

Adsorption properties of modified activated carbon for 2-dichloroethane

作　　者：李立清[1] 石瑞[1] 顾庆伟[1] 梁鑫[1] 姚小龙[1] 马卫武[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：《中南大学学报（自然科学版）》2013年第4期1701-1707,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(20976200)

摘　　要：为探讨改性活性炭吸附有机气体性能的影响,商业活性炭分别经过1 mol/L的硝酸、盐酸、硫酸,600,700和800℃处理。通过Boehm滴定、傅式转换红外光谱(FTIR)、比表面积分析仪对活性炭样品的物化性质进行测试。以二氯乙烷为吸附质进行吸附实验研究,结果表明:酸改性样品的表面酸性官能团数量增加,热改性样品的表面碱性官能团数量增加;热改性比酸改性更有效的优化活性炭的孔结构;增大活性炭的理论有效孔容是提高二氯乙烷吸附量的有效途径,表面官能团的增加可以促进活性炭对二氯乙烷的吸附作用。To study the adsorption characteristics of organic vapor on modified activated carbon, commercial activated carbon was treated separately with 1 mol/L nitric acid, 1 mol/L sulfuric acid, 1 mol/L hydrochloric acid at 600, 700 and 800 ℃. Physicochemical properties of these modified activated carbons were described by Boehm titration; Fourier transformed infrared spectroscopy （FTIR） and BET surface area measurement. The adsorption experiments were conducted with 2-dichloroethane acting as adsorbate. The results show that the total amount of acid groups increase after acid modification, while the amount of basic groups increases after heating modification; heating modification is more effective than acid modification for optimizing pore structure of activated carbon; increasing the effective pore volume is an effective way to improve adsorption capacity of 2-dichloroethane, while raising the surface functional groups can stimulate absorption effect of 2-dichloroethane.

关 键 词：改性活性炭 表面基团 孔结构 吸附 吸附能 

分 类 号：O613.71[理学—无机化学]