Kinetics and thermodynamics of the phosphine adsorption on the modified activated carbon  

作　　者：Bingnan REN 

机构地区：[1]School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China [2]College of Environment and Safety,Taiyuan University of Science and Technology,Taiyuan 030024,China

出　　处：《Frontiers of Chemical Science and Engineering》2011年第2期203-208,共6页化学科学与工程前沿（英文版）

摘　　要：The kinetics and the thermodynamics of phosphine(PH3)adsorption on the modified activated carbon have been explained for the adsorption process of PH3.This study investigated the kinetic and thermody-namic properties of PH3 adsorption on the activated carbon impregnated with 5%HCl solution.The thermodynamic properties including PH3 adsorption isotherm and adsorp-tion heat were separately investigated at 20℃,70℃,90℃.The results showed that the Freundlich-type isotherm equation described the isotherms well.The adsorption capacity increased with increasing temperature between 20℃ and 70℃.Between 70℃ and 90℃,the adsorption capacity decreased obviously with increasing temperature.The adsorption capacity reached the maximum at 70℃.By analyzing the results of the kinetics and the thermody-namics,we found that the adsorption of PH3 was dominated by physical adsorption at the lower temperature(20℃).Then with increasing temperature,chemical adsorption gradually dominated in the adsorption process.The adsorption capacity decreased at above 70℃ is due to the exothermic effects in the process of adsorption.

关 键 词：ADSORPTION PH3 activated carbon KINETICS thermodynamics 

分 类 号：O64[理学—物理化学]