NaY 및 LiY Zeolite 로 부터 흡착질의 열탈착 = Thermal Desorption of Adsorbate from NaY and LiY Zeolite

국문 초록 (Abstract)

吸着質-吸着媒間의 相互作用에 관한 정보를 얻기 위하여 NaY 및 LiY로부터 benzene, cyclohexane, methanol 및 ethanol의 熱脫着에 대하여 硏究하였다. 여러가지 一定昇溫率로 脫着溫度를 50℃로부터 400℃까지 昇溫시키면서 熱傳導度 cell을 利用하여 吸着質의 脫着曲線을 얻었다. 熱說着速度는 吸着量에 대하여 1次라 가정하여 說着曲線으로부터 活性化에너지를 구하였다. 實驗結果로부터 炭化水素는 NaY보다 LiY와 더 강력 한 吸着을 하고 있으며 benzene은 cyclohexane보다 ethanol은 methanol보다 zeolite에 대한 作用力이 크다는것을 알았다. 또한 吸着量이 減少함에 따라 benzene의 脫着活性化에너지는 比較的 급격히 增加하나 alcohol의 경우에는 완만히 增加함을 알았다.

다국어 초록 (Multilingual Abstract)

The thermal desorption of benzene, cyclohexane, methanol and ethanol from NaY and LiY zeolites has been studied to obtain information on the adsorbate-adsorbent interaction. The desorption rates of these hydrocarbons were measured with thermal conductivity cell increasing the desorption temperature from 50˚ to 400℃ with various constant heating rates. Activation energy of desorption was determined from the desorption curve, assuming the desorption rate is first order with respect to the surface coverage. The activation energy of benzene increased rapidly but that of alcohol did gradually as the surface coverage decreased. Experimental results showed that these four hydrocarbons were strongly adsorbed on LiY rather than NaY. Data also revealed that the interaction of benzene with zeolites was stronger than that of cyclohexane and the interaction of ethanol was stronger than that of methanol.