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A unique approach to predict accurate heavy oil density with new three parameter cubic equation of state
Author(s) -
Kumar Ashutosh,
Henni Amr
Publication year - 2013
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.21660
Subject(s) - equation of state , saturation (graph theory) , thermodynamics , perturbation (astronomy) , work (physics) , cubic function , crude oil , materials science , statistical physics , mathematics , physics , mathematical analysis , petroleum engineering , quantum mechanics , combinatorics , engineering
A unique approach is proposed to predict the heavy oil density using a recently developed three parameter cubic equation of state for heavy pure components. It predicts the heavy oil density with an AAD of 2.5%. The new model does not require any experimental density data for its tuning. The basic assumption in this work is that heavy oil is a mixture of n ‐alkanes and aromatics as the most prominent groups. Critical pressure characterisation for pseudo fractions is done by tuning a perturbation factor ( f c ), also representing the aromaticity, to match the predicted saturation pressure with the experimental pressure. The parameter ‘ u ’ for the pseudo fractions is adjusted using another parameter ‘ S ’ which was found to vary linearly with f c .