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HWAHAK KONGHAK,
Vol.41, No.6, 749-755, 2003
Vol.41, No.6, 749-755, 2003
Ag+/aluminosilica 흡착제에 대한 에탄과 에틸렌의 흡착특성 연구
Study on the Adsorption Characteristics of Ethane and Ethylene on Aluminosilica Based Sorbent
고농도의 에틸렌을 생산하기 위해서 π-complexation을 유도할 수 있는 질산은을 알루미노실리카에 함침시킨 흡착제를 제조하였다. 순수 성분 흡착량 측정을 위해 Cahn balance를 사용하였고, 이성분 흡착량을 측정하기 위해 부피법을 이용하였다. 순수 성분은 온도 298.15 K, 323.15 K, 353.15 K 그리고 압력 0-5,100 mmHg 범위에서 측정하였으며, 이성분은 온도 298.15 K, 323.15 K 그리고 평형 압력 900 mmHg에서 측정하였다. 에탄의 순수성분 흡착량은 Langmuir식으로도 잘 나타낼 수 있었고, 에틸렌의 순수성분 흡착량은 Toth식과 물리흡착면과 화학흡착면을 고려한 Langnuir+Unilan, Langnuir-Freundlich모델이 잘 나타내었다. 표면 덮임 정도가 증가함에 따라 에탄 및 에틸렌의 흡착열이 감소함을 알 수 있었다. 흡착열, 이성분계 흡착등온선을 계산하기 위하여 Langmuir-Freundlich, Toth식 및 IAS 모델을 사용하였다.
To produce high concentration of ethylene, new adsorbents were synthesized by incipient wetness method of AgNO3 on aluminosilica. Cahn balance was used to measure pure isotherms of C2H6 and C2H4, and volumetric apparatus was used to measure C2H4-C2H6 binary isotherms. Adsorption isotherms of pure gases were measured at 298.15 K, 323.15 K and 353.15 K, pressure ranges are from 0 mmHg to 5,100 mmHg. Pure ethane isotherm showed good agreement with Langmuir isotherm and pure ethylene isotherm showed good agreement with Langmuir-Freundlich and Langmuir+Unilan isotherms which were derived from considering physical site and chemical site. The decrease in heat of adsorption of ethylene with increasing the coverage was observed and the same result in case of ethane. Langmuir-Freundlich isotherm, Toth isotherm and ideal adsorbed solution(IAS) model were used to calculate isosteric heats of adsorption, and also used to predict binary isotherms.
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[Cited By]
- Kang M, Lee HI, Yoon DY, Ko CH, Kim JN, Kim JM, Korean Chemical Engineering Research, 44(4), 393, 2006
- Cho MW, Yoon SH, Park YK, Choi WC, Kim HY, Park SK, Lee CW, Journal of the Korean Industrial and Engineering Chemistry, 20(4), 407, 2009
- Lee JI, Park JH, Beum HT, Yi KB, Ko CH, Park SY, Lee YT, Kim JN, Korean Chemical Engineering Research, 48(6), 768, 2010
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