Characterizing Adsorption Performance of Granular Activated Carbon with Permittivity

Yang Yang; Chao Shi; Yi Zhang; Jinghua Ye; Huacheng Zhu; Kama Huang

doi:10.3390/ma10030269

Characterizing Adsorption Performance of Granular Activated Carbon with Permittivity

Materials (Basel). 2017 Mar 7;10(3):269. doi: 10.3390/ma10030269.

Authors

Yang Yang¹, Chao Shi², Yi Zhang³, Jinghua Ye⁴, Huacheng Zhu⁵, Kama Huang⁶

Affiliations

¹ College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China. yyang@scu.edu.cn.
² College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China. shichaoscu@126.com.
³ College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China. yizhangscu@126.com.
⁴ College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China. 2015322050010@stu.scu.edu.cn.
⁵ College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China. hczhu@scu.edu.cn.
⁶ College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China. kmhuang126@126.com.

Abstract

A number of studies have achieved the consensus that microwave thermal technology can regenerate the granular activated carbon (GAC) more efficiently and energy-conservatively than other technologies. In particular, in the microwave heating industry, permittivity is a crucial parameter. This paper developed two equivalent models to establish the relationship between effective complex permittivity and pore volume of the GAC. It is generally based on Maxwell-Garnett approximation (MGA) theory. With two different assumptions in the model, two quantificational expressions were derived, respectively. Permittivity measurements and Brunauer-Emmett-Teller (BET) testing had been introduced in the experiments. Results confirmed the two expressions, which were extremely similar. Theoretical and experimental graphs were matched. This paper set up a bridge which links effective complex permittivity and pore volume of the GAC. Furthermore, it provides a potential and convenient method for the rapid assisted characterization of the GAC in its adsorption performance.

Keywords: granular activated carbon; permittivity; pore volume.