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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 49, Number 5
JKCSEZ 49(5)
October 20, 2005 

 
Title
The Partition Coefficient Properties of Sulfur Compounds in Liquefied Dimethyl Ether, Propane and n-butane Mixed Gas

디메틸에테르, 프로판, n-부탄 혼합 액화가스에서 황화합물의 분배계수 특성
Author
Young-Gu Kim*, Yong-Doo Kim

김영구*, 김용두
Keywords
디메틸에테르, 액화석유가스, 분배계수, 황화합물 , Dimethyl Ether, Liquified Petroleum Gas, Partition Coefficient, Sulfur Compound
Abstract
프로판, 디메틸에테르, n-부탄 혼합 액화 가스에서 악취성 황화합물인 에탄티올, 황화이메틸, 2-메틸프로판-2-티올 및 황화메틸에틸의 분배계수(PC)를 연구하였다. 황화합물의 분배계수는 다변량회귀분석으로 분석하였다. 분배계수에 영향을 주는 설명인자는 액화혼합가스 중의 디메틸에테르(DME) 조성(Mol%), 혼합가스의 증기압(Vap), 각 황화합물의 쌍극자모멘트(D) 및 황화합물의 끓는점(bp(K)) 등이었다. SPSS(Statistical Package for Social Science)를 사용하여 황화합물의 분배계수 예측식을 다음과 같이 얻을 수 있었다. PC=-6.66×10-4Mol% - 0.223 Vap - 0.137 D - 5.91×10-3 bp (K) + 2.491(N=28, Radj2= 0.773, F=19.50). 설명인자 중에 황화합물의 끓는점, 혼합가스의 증기압이 분배계수에 주로 영향를 주었다. 각 설명인자가 증가함에 따라 분배계수는 감소하는 경향을 보여준다. 액화석유가스에서 황화합물의 분배계수는 액화석유가스의 증기압과 선형적 종속관계를 가지나, 디메틸에테르가 함유된 액화가스에서 황화합물의 분배계수는 액화가스의 증기압 및 액화가스중의 디메틸에테르 함량과 선형적 종속관계를 가진다.

The partition coefficients of odorizing sulfur compounds such as ethanethiol, dimethyl sulfide, 2-methyl propane-2-thiol and methyl ethyl sulfide in liquid propane, dimethyl ether and n-butane mixture, were studied. The partition coefficients of the sulfur compounds are determined by the multiple linear regression by using SPSS(Statistical Package for Social Science). The descripters effecting on the partition coefficients (PC) are the compositions (Mol%) of dimethyl ether in liquefied mixed gas, vapor pressure (Vap) of liquid mixed gas, dipole moment (D) of the sulfur compounds, and the boiling point (bp(K)) of the sulfur compounds. Predicted equation of partition coefficient for sulfur compounds using SPSS program is as follows; PC = -6.66×10-4 Mol% - 0.223 Vap - 0.137 D - 5.91×10-3 bp (K) + 2.491 (N=28, Radj2= 0.773, F=19.50). The important descripters are the boiling point of sulfur compounds, and the vapor pressure of the liquid mixed gas. The partition coefficients have decreasing propensity as the individual descripters increase. The partition coefficients of sulfur compounds in liquified petroleum gas are linearly dependent on the vapor pressures of liquid gas, while those in liquid gas containing dimethyl ether are linearly dependent on the vapor pressures and the contents of dimethyl ether in liquefied gas.

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