Adsorption Kinetics of Dibenzofuran in Activated Carbon Packed Bed

›› 2008, Vol. 16 ›› Issue (2): 203-208.

• SEPARATION SCIENCE & ENGINEERING • Previous Articles Next Articles

Adsorption Kinetics of Dibenzofuran in Activated Carbon Packed Bed

LI Xiang^1,2, LI Zhong¹, LUO Ling'ai³

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. 3Laboratoiredes Sciences du Genie Chimique, CNRS, Nancy 54001, France

Received:2007-06-29 Revised:2007-11-11 Online:2008-04-28 Published:2008-04-28
Supported by:
the National Natural Science Foundation of China(29936100);the Natural Science Foundation of GuangdongProvince(7010327)

Adsorption Kinetics of Dibenzofuran in Activated Carbon Packed Bed

李湘^1,2, 李忠¹, 罗灵爱³

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. 3Laboratoiredes Sciences du Genie Chimique, CNRS, Nancy 54001, France

通讯作者: LI Xiang,E-mail:lix@zqu.edu.cn
基金资助:
the National Natural Science Foundation of China(29936100);the Natural Science Foundation of GuangdongProvince(7010327)

Abstract

Abstract: 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.

Key words: adsorption breakthrough curve, diffusion coefficient, physical structure, dibenzofuran, activated carbons

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.

关键词: adsorption breakthrough curve, diffusion coefficient, physical structure, dibenzofuran, activated carbons

LI Xiang, LI Zhong, LUO Ling'ai. Adsorption Kinetics of Dibenzofuran in Activated Carbon Packed Bed[J]. , 2008, 16(2): 203-208.

李湘, 李忠, 罗灵爱. Adsorption Kinetics of Dibenzofuran in Activated Carbon Packed Bed[J]. , 2008, 16(2): 203-208.

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Adsorption Kinetics of Dibenzofuran in Activated Carbon Packed Bed

Adsorption Kinetics of Dibenzofuran in Activated Carbon Packed Bed

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