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Received April 17, 2008
Accepted May 29, 2008
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Li-X 제올라이트 흡착탑에서 H2/CO2, H2/CO, H2/CH4 혼합기체의 흡착 동특성
Adsorption Dynamics of H2/CO2, H2/CO and H2/CH4 Mixtures in Li-X Zeolite Bed
한국과학기술연구원 에너지 환경 연구부, 136-791 서울시 성북구 하월곡동 39-1 1연세대학교 화공생명공학과, 120-749 서울시 서대문구 신촌동 134
Energy & Environment Research Division, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Sungbuk-gu, Seoul 136-791, Korea 1Department of Chemical and Biomolecular Enginnering, Yonsei University, 134, Sinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
dkchoi@kist.re.kr
Korean Chemical Engineering Research, August 2008, 46(4), 783-791(9), NONE Epub 10 September 2008
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Abstract
Li-X 제올라이트 흡착탑에서의 H2/CO2(80:20 vol%), H2/CO(90:10 vol%), H2/CH4(90:10 vol%)의 이성분계 기체의 흡착 동특성을 연구하였다. 각 계에서 공급유속(6.24~10.24 LPM), 흡착압력(6.1~10.1 bar)에 대한 영향을 살펴보았다. 동특성 실험 결과 파과시간은 공급유속이 적을수록, 흡착압력이 높을수록 증가하였으며 탑 내부 온도의 영향으로 tailing 현상이 발생하였다. Li-X 제올라이트 흡착탑에서 공급 유량과 압력의 확산계수에 의한 LDF식을 사용하여 예측하였다. 본 연구에서는 비등온과 비단열상태, Dual-site langmuir 등온식과 고려하여 해석하였으며 실험 데이터와 비교하였다.
The dynamic characteristics of adsorption using an adsorption bed packed with Li-X zeolite (UOP) were studied through the breakthrough experiments of H2/CH4 (90:10 vol%), H2/CO (90:10 vol%) and H2/CO2 (80:20 vol%) mixtures. Effects of feed flow rate (6.24~10.24 LPM) and adsorption pressure (6.1 bar~10.1 bar) in the Li-X zeolite bed with 2.7 cm of inside diameter and 80 cm of bed length were observed. The smaller feed rate or the higher operating pressure, resulted in the longer of the breakthrough time and the breakthrough curve have tailing due to temperature variance in the bed. The adsorption dynamics of the Li-X zeolite bed were predicted by using LDF model with feed flow and pressure dependent diffusivity. The prediction and experimental data were analyzed with a nonisothermal, nonadiabatic model, dual-site langmuir (DSL) isotherm
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Lee JG, Lee JW, Kim MB, Cho CH, Lee CH, HWAHAK KONGHAK, 37(5), 706 (1999)
Malek A, Farooq SJ, J. Chem. Eng. Data, 41(1), 25 (1996)
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Han S, Yang J, Lee CH, Lee H, HWAHAK KONGHAK, 34(3), 277 (1996)
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Ahn HW, Yang JY, Lee CH, Adsorption, 7(4), 339 (2001)
Park JH, Kim JN, Cho SH, AIChE J., 46(4), 790 (2000)
Yang JY, Lee CH, AIChE J., 44(6), 1325 (1998)
Jee JG, Kim MB, Lee CH, Ind. Eng. Chem. Res., 40(3), 868 (2001)
