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- W2002303960 abstract "Abstract The boiling point of feedstock is an important process design parameter for petroleum system. In heavy petroleum fractions that boil above 524°C, it is difficult to explicitly determine the boiling point due to limitation of analytical capability. In this article, a modified Cordes-Rarey group contribution method for estimating boiling point of heavy oil was developed on the basis of structure parameters of oil fractions. Narrow fractions of heavy oil were prepared by using the supercritical fluid extraction and fractionation (SFEF). The average boiling points of light SFEF fractions were measured up to 680°C. Elemental analyses and the 1H and 13C-NMR spectra of the SFEF fractions were obtained to determine structure parameters and construct average molecules of SFEF fractions. The results show that the boiling point was correlated with total atom number (except hydrogen) of SFEF fraction. The predicted boiling points for more than 60 SFEF fractions at 320–680°C derived from an Eastern Siberia crude and its blend with Daqing crude agree well with measured values within 2.04%. The predicted boiling points of normal alkanes and polycyclic aromatics are in agreement with literature data. It is suggested that the proposed group contribution method, in combination with the characterization data of SFEF fractions, can be used to estimate the average boiling points of heavy oil fractions up to 800°C. Keywords: boiling pointgroup contribution methodheavy oil fractions ACKNOWLEDGMENT The authors acknowledge the financial support from the China National Basic Research Program, grant numbers 2004CB217801 and 2004CB217803. Notes * ID, Cordes-Rarey group identification number; PR, Cordes-Rarey group priority. a Data from CRC Handbook. b Estimation by this work. c Estimation by Cordes-Rarey" @default.
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- W2002303960 date "2006-03-01" @default.
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- W2002303960 title "A New Group Contribution Method for Estimating Boiling Point of Heavy Oil" @default.
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- W2002303960 doi "https://doi.org/10.1080/10916460500278534" @default.
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