Yang Yang, Shi Chao, Zhang Yi, Ye Jinghua, Zhu Huacheng, Huang Kama
College of Electronic and Information Engineering, Sichuan University, Chengdu 610065, China.
Materials (Basel). 2017 Mar 7;10(3):269. doi: 10.3390/ma10030269.
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.
多项研究已达成共识，即微波热技术比其他技术能更高效、节能地再生颗粒活性炭（GAC）。特别是在微波加热行业，介电常数是一个关键参数。本文建立了两个等效模型，以确定GAC的有效复介电常数与孔体积之间的关系。该模型一般基于麦克斯韦-加尼特近似（MGA）理论。在模型中有两种不同假设，分别推导出了两个定量表达式。实验中引入了介电常数测量和布鲁诺尔-埃米特-泰勒（BET）测试。结果证实了这两个极为相似的表达式。理论图与实验图相匹配。本文搭建了一座连接GAC有效复介电常数和孔体积的桥梁。此外，它为快速辅助表征GAC的吸附性能提供了一种潜在且便捷的方法。
