A Study on the Hydrocarbon Dew Point Prediction by the Compositions of the Fuel Gas Mixtures

Title & Authors
A Study on the Hydrocarbon Dew Point Prediction by the Compositions of the Fuel Gas Mixtures
Kim, Young-Gu; Choi, Seul-Gi; Ahn, Jung-Jin; Lee, Chang-Eon;

Abstract
The equations of hydrocarbon dew points(DT) of the fuel gas mixtures have been derived using the multiple regression analysis. In QSDR(Quantitative Structure Dew-point Relationship), the principal descriptors are CN(average carbon number) and BI(the ratio of the branched isomers). QSDRs studied by changing the pressures of the fuel gas mixtures in the range of 100 kPa ~ 500 kPa are as follows; $\small{DT(^{\circ}C)=-683.1+1224.98CN-898.01CN^2+308.58CN^3-49.56CN^4+3.02CN^5-12.42BI}$ (at 100 kPa, $\small{R_{adj}{^2}=0.99}$) (1) $\small{DT(^{\circ}C)=-745.2+1351.66CN-978.1CN^2+332.7CN^3-52.96CN^4+3.20CN^5-12.84BI}$ (at 200 kPa, $\small{R_{adj}{^2}=0.99}$) (2) $\small{DT(^{\circ}C)=-795.4+1457.1CN-1051.1CN^2+357.53CN^3-57.07CN^4+3.46CN^5-13.10BI}$ (at 300 kPa, $\small{R_{adj}{^2}=0.99}$) (3) $\small{DT(^{\circ}C)=-868.1+1608.4CN-1156.0CN^2+393.38CN^3-63.06CN^4+3.85CN^5-13.39BI}$ (at 500 kPa, $\small{R_{adj}{^2}=0.99}$) (4) As the average carbon numbers in the mixed fuel being reduced or the ratio of the branched isomers having a boiling point lower increase, The hydrocarbon dew point becomes lower, The differences between the hydrocarbon-dew points determined by the multiple regression and those calculated by the commercial program, VMGSim are negligible.
Keywords
QSDR;hydrocarbon dew point;multiple regression analysis;
Language
Korean
Cited by
References
1.
도시가스의 품질기준 등에 관한 고시, 산업통상자원부 고시 제2014-183호

2.
Ding-Yu Peng, Donald B. Robinson, "The Peng Robinson equation of state", Industrial & Engineering Chemistry Fundamentals, Vol. 15, No1, (1976)

3.
액화석유가스의 품질기준과 검사방법.검사수수료 및 검사 소요경비 지원방법 등에 관한 고시 산업통상자원부 고시 제2013-25호