中国电机工程学报Issue(29)：10-17,8.
活性炭汞吸附动力学及吸附机制研究
Kinetics and Mechanism of Activated Carbon Adsorption for Mercury Removal
摘要
Abstract
An experimental study on mercury adsorption of a commercial activated carbon was carried out in a fixed-bed reactor. The effects of inlet mercury concentration and temperature on mercury adsorption efficiency were explored. Four simplified adsorption kinetic models, including intraparticle diffusion model, pseudo-first and pseudo-second order kinetic models, and Elovich model, were used to investigate the mechanism of mercury adsorption, adsorption rate, and the controlling process from the kinetic point of view. The results show that the increase of inlet mercury concentration or the decrease of temperature is beneficial to promoting the mercury adsorption capacity, due to the enhancement of intraparticle diffusion rate, initial adsorption rate, and pseudo-first order reaction rate. The mercury adsorption process is controlled dominantly by chemisorption, which comprises two steps:surface adsorption and intraparticle diffusion adsorption. The Hg0 adsorption rate is higher in the initial stage, which is determined by the surface adsorption. After that the adsorption rate drops continuously as the surface active sites are occupied and the intraparticle diffusion dominates the adsorption.关键词
活性炭/汞吸附/动力学模型/控制过程/吸附机制Key words
activated carbon/mercury adsorption/kinetic model/control process/adsorption mechanism分类
资源环境引用本文复制引用
周强,段钰锋,冒咏秋,朱纯..活性炭汞吸附动力学及吸附机制研究[J].中国电机工程学报,2013,(29):10-17,8.基金项目
国家自然科学基金项目(51076030)；江苏省环保科研课题基金项目(201113)；江苏省产学研联合创新资金项目(BY2013073-10)；煤燃烧国家重点实验室开放基金项目(FSKLCC1002)。Project Supported by National Nature Science Foundation of China (51076030) （51076030）
The Jiangsu Province Environmental Protection Subject Foundation (201113) （201113）
The Jiangsu Province United Creative Subject (BY2013073-10) （BY2013073-10）
The Foundation of State Key Laboratory of Coal Combustion (FSKLCC1002) （FSKLCC1002）
