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Received February 18, 2008
Accepted May 29, 2008
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Adsorption and desorption characteristics of CF4 on fixed bed column
Department of Chemical Engineering, Hongik University, 72-1 Sangsu-dong, Mapo-gu, Seoul 121-791, Korea 1School of Chemical Engineering, Chungbuk National University, 12 Gaesin-dong, Heungduk-gu, Chungbuk 361-763, Korea
nabk@chungbuk.ac.kr
Korean Journal of Chemical Engineering, November 2008, 25(6), 1518-1523(6), 10.1007/s11814-008-0250-8
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Abstract
Adsorption and desorption characteristics of CF4, which is considered a significant global warming compound, were experimentally investigated. Dynamic behavior of feed gas mixture of CF4 and N2 was observed by breakthrough curve. Effects of CF4 concentrations in the feed gas were investigated, and three pressurization methods were compared. Desorption experiments were carried out using vacuum blowdown and purge. Desorption curves with various N2 flow rates, feed compositions, and purge time were obtained. The enrichment factor was high for low concentration of CF4. However, the time required for complete desorption was independent of CF4 concentration. In the operation of separate vacuum blowdown and purge steps, a short period of vacuum blowdown followed by the purge step was effective.
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Yang RT, Gas Separation by adsorption process, Butterworth Publishers, Boston (1987)
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Moon DJ, Chung MJ, Kim H, Lee BG, Lee SD, Park KY, Korean J. Chem. Eng., 15(6), 619 (1998)
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