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HWAHAK KONGHAK,
Vol.22, No.1, 1-5, 1984
Vol.22, No.1, 1-5, 1984
알루미나에서 Tetraphenylporphine의 역확산
Counterdiffusion of Tetraphenylporphine in Alumina
알루미나에서 tetraphenylporphine의 역확산과정을 조사하였다. 아세톤 등의 탈착제를 주입하여 강제 탈착시켜 흡착제 밖으로 확산되어 나오는 과정을 측정하여, 세공확산모델을 적용, 역확산계수를 결정하였다. 용매만 채워져 있는 세공내로의 유효확산계수가 ∼10-6 cm2/sec임에 비해 역확산계수는 ∼10-11 cm2/sec로 크게 감소되었다. 알루미나의 세공크기가 줄어듬에 따라 역확산계수도 적어져, 역확산과정도 세공에 의해 억제됨을 보여주었다. 탈착제의 종류 및 농도에 의한 영향도 검토하였다.
The counterdiffusion of tetraphenylporphine（TPP） in four different pore sizes of amorphous gamma-aluminas was studied. TPP was desorbed due to the addition of desorbates, e.g. acetone, and diffused out of alumina. The rate of desorption of TPP to the solution was measured, and the effective diffusivity was determined using a pore diffusion model. The effective diffusivity of TPP into the alumina was -10-6 cm2/s, but for the counterdiffusion was -10-11 cm2/s. The effective diffusivities in aluminas were decreased with decreasing pore diameter. The effects of desorbates and their concentration on the counterdiffusion are discussed.
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