Adsorption Kinetics of Dibenzofuran in Activated Carbon Packed Bed  

作　　者：李湘 李忠 罗灵爱 

机构地区：[1]Institute of Chemical Engineering, South China University of Technology, Guangzhou 510640, China [2]School of Chemistry and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China [3]Laboratoiredes Sciences du Genie Chimique, CNRS, Nancy 54001, France

出　　处：《Chinese Journal of Chemical Engineering》2008年第2期203-208,共6页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （29936100） and the Natural Science Foundation of Guangdong Province （7010327）. The authors would like to thank to Pro. GU0 Haifu in Chemistry and Chemical Engineering department of Zhaoqing University for providing the necessary facilities to conduct part of the experimental work reported in this study.

摘　　要：The adsorption of dibenzofuran （DBF） on three commercial granular activated carbons （GAC） was investigated to correlate the adsorption equilibrium and kinetics with the morphological characteristics of activated carbons. Breakthrough experiment was conducted to determine the isotherm and kinetics of dibenzofuran on the activated carbons. All-the experiment runs were performed in a fixed bed with a process temperature of 368 K. The effects of adsorbent morphological properties on the kinetics of the adsorption process were studied. The equilibrium data are found satisfactory fitted to the Langmuir isotherm. An intraparticle diffusion model based on the obtained Langmuir isotherm was＇developed for predicting the fixed bed adsorption of dibenzofuran. The result indicated that this model fit all the breakthrough curves well. The surface diffusion coefficients of dibenzofuran on the activated carbon are calculated, and a relationship with the microporosity is found. As it was expected, the dibenzofuran molecule finds more kinetic restrictions for the diffusion in those carbons with narrower pore diameter.三商业颗粒活性炭(粒状活性炭) 上的氧芴(DBF ) 的吸附被调查相关有活性炭的词法特征的吸附平衡和动力学。穿透实验被进行在活性炭上决定氧芴的等温线和动力学。所有实验跑与 368 K 的过程温度在一张固定床被执行。吸附物的效果吸附过程的动力学上的词法性质被学习。平衡数据被发现令人满意适合到兰米尔等温线。一个 intraparticle 模型为预言氧芴的固定床吸附基于获得的兰米尔等温线被开发。结果显示这个模型适合所有突破曲线很好。活性炭上的氧芴的表面扩散系数被计算，并且与微孔的一种关系被发现。当它被期望，氧芴分子与更狭窄的孔径在那些碳为散开发现更运动的限制。

关 键 词：adsorption breakthrough curve diffusion coefficient physical structure dibenzofttran activated carbons 

分 类 号：O6[理学—化学]