Analysis of Counter-diffusion of Aromatic Compounds on Alumina by Spectrophotometry

Ko, Tae-Seog; 고태석; Chung, Kyeong-Hwan; 정경환

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P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

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Vol.8, No.2

PubReader Citation

Analysis of Counter-diffusion of Aromatic Compounds on Alumina by Spectrophotometry

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

1995, v.8 no.2, pp.205-213

Ko, Tae-Seog
Chung, Kyeong-Hwan

Ko, T., & Chung, K. (1995). Analysis of Counter-diffusion of Aromatic Compounds on Alumina by Spectrophotometry. , 8(2), 205-213.

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Abstract

Counter-diffusion of coronene desorbed from alumina with addition of tetra-phenylporphine was studied by spectrophotometry. The counter-diffusion processes of adsorbing and desorbing materials in liquid phase were simulated by counter-diffusion model based on Fritz's binary component isotherm under an assumption of equimass diffusion. The counter-diffusivities of desorbed coronene with addition of tetra-phenylporphine were as ${\sim}10^{-15}m^2/sec$ and that of adsorbed tetra-phenylporphine as ${\sim}10^{-11}m^2/sec$. The counter-diffusivity of coronene determined from desorption process was smaller by ${\sim}10^5$ times than the diffusivity determined from adsorption process of a single species. The reduction of the determined counter-diffusivity of coronene in desorption process was explained by the cross of diffusion fluxes and build-up of high gradient of coronene in pore.