HWAHAK KONGHAK, Vol.20, No.3, 199-206, June, 1982
지올라이트 NaY에 대한 벤젠-사이클로헥산 혼합물 흡착의 온도 의존성
Temperature Dependence in Adsorption of Benzene-Cyclohexane Mixtures on NaY Zeolite
초록
지올라이트 NaY에 대한 벤젠-사이클로헥산 혼합물의 액상흡착을 20 ℃, 25 ℃, 30 ℃ 및 35 ℃에서 조사하였다. 흡착이 잘 되지 않은 흡착질, 사이클로헥산을 흡착평형이 이루어진 용액에 미량 첨가하여 액상의 농도를 약간 변화시켰을 때 흡착상의 몰수와 조성은 변하지 않는다고 가정하여 각 성분의 흡착등온선을 구하였다.
벤젠이 지올라이트 NaY에 선택흡착되었으며 각 성분의 흡착등온선은 Langmuir 형태를 나타내었다. 흡착평형에 도달되는 시간은 흡착온도가 낮을수록 오래 걸렸으며 Surface excess와 각 성분의 흡착량은 온도가 증가함에 따라 감소하였으나 벤젠의 흡착선택도는 증가하였다.
벤젠이 지올라이트 NaY에 선택흡착되었으며 각 성분의 흡착등온선은 Langmuir 형태를 나타내었다. 흡착평형에 도달되는 시간은 흡착온도가 낮을수록 오래 걸렸으며 Surface excess와 각 성분의 흡착량은 온도가 증가함에 따라 감소하였으나 벤젠의 흡착선택도는 증가하였다.
Adsorption of binary liquid mixtures of benzene and cyclohexane on NaY zeolite has been studied at 20 ℃, 25 ℃, 30 ℃ and 35 ℃. In this work, the individual adsorption isotherms were obtained on the assumption that the number of moles and the compositions of the adsorbed phase did not change when a little amount of cyclohexane, which is a poor-adsorption adsorbate, was added to the solution in the adsorption equilibrium.
Benzene was preferentially adsorbed on NaY zeolite, and the individual adsorption isotherms showed the Langmuir type. A long period of time was required for the adsorption equilibrium to be established at lower temperatures. With temperature increase, surface excess and the amounts of adsorption for each component were decreased but the adsorption selectivity of benzene was increased.
Benzene was preferentially adsorbed on NaY zeolite, and the individual adsorption isotherms showed the Langmuir type. A long period of time was required for the adsorption equilibrium to be established at lower temperatures. With temperature increase, surface excess and the amounts of adsorption for each component were decreased but the adsorption selectivity of benzene was increased.