PRELIMINARY PHASE DIAGRAMS FOR BITUMEN/ HEAVY OILS AND RELATED MIXTURES
作者:
CliveR. Cartlidge,
Leisl Dukhedin-Lalla,
Parviz Rahimi,
JohnM. Shaw,
期刊:
Fuel Science and Technology International
(Taylor Available online 1996)
卷期:
Volume 14,
issue 1-2
页码: 163-178
ISSN:0884-3759
年代: 1996
DOI:10.1080/08843759608947567
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The phase behaviour of heavy oil mixtures was studied using an X-ray imaging system. Batch phase experiments were performed at temperatures and pressures up to 725 K and 7 MPa. Complex phase behaviour such as liquid-liquid-vapour and solid-liquid-liquid-vapour were observed and preliminary experimental phase diagrams were constructed. This observed complex phase behaviour is consistent with thermodynamic theory and such phase behaviour can be modelled using the Peng-Robinson equation of state and the tangent plane criterion. These latter points are illustrated through the phase diagram for a model reservoir fluid (ethane + propane + n-butane + phenanthrene) which exhibits solid-liquid-liquid-vapour phase behaviour. Example predicted and experimental phase diagrams are presented for this model system.
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