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γ - Alumina 로부터 흡착질의 열탈착에 관한 연구
문세기,김형진,심준보 ( Sei Ki Moon,Hyung Jin Kim,Joon Bo Shim ) 한국화학공학회 1984 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.22 No.2
Thermal desorption has been studied or γ-alumina which adsorbed adsorbates, such as benzene, cyclohexane, methylalcohol, ethylalcohol, n-propylalcohol and iso-propylalcohol, separately at 20℃ with Gas Chromatogrphic apparatus. As the temperature of adsorbent was raised from 20℃ to 350℃ with the constant heating rates(5-15 ℃/min), the species on adsorbent surface were desorbed, and thermal conductivity detector was employed to monitor the desorbate in effluent gas. The thermal desorption chromatogram was investigates to obtain the information about the active sites, behavior of desorbed phase with increasing temperature and the adsorbate-adsorbent interation. By means of the temperature at peak maximum, T_m the desorption kinetic parameters, e.g., activation energy of desorption and frequency factor were determined. It was found that γ-alumina had two kinds of active sites different in their property for alcohols. Experimental results represented that the desorption rate was first order with respect to the surface coverage.
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