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      • CF_4의 동적흡착특성 연구

        안능균,김준형,강성원,서성섭 한국공업화학회 2002 응용화학 Vol.6 No.1

        PFC(PerFluoroCompounds) are used as CFC(ChloroFluoroCarbons) substitutes. PFC are highly stable gases with long atmospheric lives and are considered significant global warming compounds. Therefore, PFC gas have been targeted by governments worldwide for significant reduction in emission. One way to control the emission of PFC gases is adsorption. In this study, the adsorption behavior of CF_4 on activated carbon in adsorption column was studied by breakthrough curve analysis. Effects of CF_4 concentrations in feed gasand pressurization condition were investigated. Desorption curves with various N_2 flow rates and feed compositions were obtained.

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        Adsorption and desorption characteristics of CF4 on fixed bed column

        나병기,Sung-Sup Suh,Neung Gyun Ahn 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.6

        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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