Journal of Petroleum & Environmental Biotechnology

Application of consistency test to the analysis of supercritical carbon dioxide extraction of crude oil

2^nd World Congress on Petrochemistry and Chemical Engineering

October 27-29, 2014 Embassy Suites Las Vegas, USA

Svetlana Rudyk

Accepted Abstracts: J Pet Environ Biotechnol

Abstract:

Consistency test based on the Gibbs?Duhem equation, which is used to analyse experimental phase equilibrium data, show that, for the simple symmetric binary systems, the natural logarithm of the ratio of the activity coefficients of both species ranges from 1 to −1 throughout the entire concentration range so that the sum of areas above and below the zero line is equal to null. The consistency test was applied for the analysis of the crude oil extraction obtained by pure supercritical carbon dioxide and modified with the additions of various co-solvents. The unique combinations of saturation vapor pressures that satisfied the consistency tests were determined for the investigated systems using the criterion of the even distribution of the data about zero line in the plots of area test. The P 1 sat decreased with increase of boiling temperature.The quality of the co-solvents was estimated based on the deviations of the experimental graphs from the ideal line: negative deviations characterized good solvent while positive indicated poor solvency. The modified consistency test was suggested to distinguish the effect of each co-solvent on the vapor phase extraction.

Biography :

Svetlana Rudyk has completed his PhD from State Academy of Oil and Gas, Moscow, Russia. She is a Shell Chair in Petroleum Geoscience at Oil and Gas Research Center of Sultan Qaboos University, Oman.