香叶基丙酮在4种吸附材料上扩散系数和扩散机理

作者：Wang Mingfeng; He Jiajie; Li Yuandong; Lu Zhenbao; Li Zhong; Liao Tougen^*

来源：Ion Exchange and Adsorption, 2018, 34(4): 374-384.

DOI：10.16026/j.cnki.iea.2018040374

• Adsorption
• Desorption
• Diffusion coefficient
• Diffusion mechanism
• Geranylacetone
• Porous materials

This work is mainly concerned with study of the effects of textural structures of four adsorbents on diffusion mechanisms of geranylacetone. The model for estimating diffusion coefficient of geranylacetone was established based on the LDF model. The desorption kinetic curves of geranylacetone from adsorbents were measured by thermo-gravimetric technique and then the diffusion coefficients D e (t) of geranylacetone desorption were estimated. Results showed that the textural structure of adsorbents had significantly influence on the diffusion of geranylacetone within the four adsorbents. The larger bigger the pore size of an adsorbent was, the higher the diffusion coefficient of geranylacetone within the adsorbent became. The diffusion coefficient of geranylacetone decreased with a decrease of amounts adsorbed. The diffusion of geranylacetone desorption from Hβ-zeolite was dominated by, Knudsen diffusion mechanism, and its Knudsen diffusion coefficient was nearly constant due to its even pore size of 0.6nm. The diffusion of geranylacetone desorption from activated carbon was dominated by surface diffusion mechnism since the activated carbon contained lots of micropores with pore sizes below 0.5nm. ? 2018, Editorial Office, Ion Exchange and Adsorption. All right reserved.

• 单位
  华南理工大学