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- In relation to this article, we declare that there is no conflict of interest.
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Received December 26, 2006
Accepted January 30, 2007
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C12E8 비이온 계면활성제 수용액에 의한 탄화수소 오일의 가용화에 관한 연구
Solubilization of Hydrocarbon Oils by C12E8 Nonionic Surfactant Solution
동국대학교 공과대학 생명·화학공학과, 100-715 서울시 중구 필동 3-26
Department of Chemical and Biochemical Engineering, Dongguk University, 3-26, Pil-dong, Chung-gu, Seoul 100-715, Korea
jongchoo@dongguk.edu
Korean Chemical Engineering Research, June 2007, 45(3), 219-225(7), NONE Epub 25 June 2007
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Abstract
비이온 계면활성제 C12E8 수용액의 탄화수소 오일에 대한 가용화도(equilibrium solubilization capacity)를 30℃에서 기체 크로마토그래피(GC)를 이용하여 측정하였다. 탄화수소 오일의 가용화도를 실험에 사용한 계면활성제의 농도로 나눈 값으로 표시한 molar solubilization ratio(MSR)는 순수한 단일 성분의 탄화수소 오일 경우, 탄화수소 오일의 탄소수(ACN)가 증가함에 따라 거의 선형적으로 감소함을 알 수 있었다. 한편 탄화수소 오일의 이성분 시스템은 사용한 두 탄화수소 오일의 탄소수(alkane carbon number, ACN) 차이에 따라 선택적 가용화 혹은 비선택적 가용화 경향을 나타내었다. 본 연구에서 가용화도 실험을 수행한 n-octane/n-nonane과 n-nonane/n-decane 혼합물 시스템의 경우, 비선택적 (non-selective) 가용화 경향을 나타내었으며, 반면에 n-octane/n-decane 혼합물 시스템의 경우에는 선택적(selective) 가용화 경향을 따르는 것을 GC 분석 결과로부터 확인할 수 있었다.
The equilibrium solubilization capacity of pure hydrocarbon oils by 2.5 wt% C12E8 nonionic surfactant solution was measured at 30 °C by gas chromatography (GC) analysis. Experimental results indicated that the molar solubilization ratio (MSR) for pure alkanes was found to decrease almost linearly with the alkane carbon number (ACN) of the hydrocarbon oil. For the binary mixture systems of the hydrocarbon oils both selective and nonselective solubilization behaviors were observed depending on the difference in carbon number of the two hydrocarbon oils. Equilibrium solubilization tests for the two n-octane/n-nonane and n-nonane/n-decane mixture systems in C12E8 surfactant solutions suggest slightly selective solubilization in favor of n-octane, but the small difference in solubilization rates between two hydrocarbon oils does not allow ruling out non-selective solubilization for these particular systems. This is certainly not the case for the n-octane/n-decane mixture, for which selective solubilization was conclusively demonstrated by GC analysis data.
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References
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Chen BH, Miller CA, Colloids Surf. A: Physicochem. Eng. Asp., 128(1), 129 (1997)
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Kralchevsky PA, Denkov ND, Todorov PD, Marinov GS, Broze G, Mehreteab A, Langmuir, 18(21), 7887 (2002)
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Dungan SR, Tai BH, Gerhardt NI, Colloids Surf. A: Physicochem. Eng. Asp., 216(1), 149 (2003)
Todorov PD, Kralchevsky PA, Denkov ND, Broze G, Mehreteab A, J. Colloid Interface Sci., 245(2), 371 (2002)
Williams CL, Bhakta AR, Neogi P, J. Phys. Chem. B, 103(16), 3242 (1999)
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Schick MJ, Nonionic Surfactants: Physical Chemistry, Surfactant Science Series Vol. 23, Marcel Dekker, Inc., New York (1987)
Christian SD, Scamehorn JF, Solubilization in Surfactant Aggregates, Surfactant Science Series Vol. 55, Marcel Dekker, Inc., New York (1995)
Prak DJ, Abriola LM, Weber WJ, Bocskay KA, Environ. Sci. Technol., 34(3), 476 (2000)
Lim JC, Miller CA, Yang CH, Colloids Surf., 66(1), 45 (1992)
Ahn HJ, Oh SG, Choi KS, J. Korean Ind. Eng. Chem., 8(6), 881 (1997)
Caceres T, Lissi EA, J. Colloid Interface Sci., 97(1), 298 (1984)
Chaiko MA, Nagarajan R, Ruckenstein E, J. Colloid Interface Sci., 99(1), 168 (1984)
