|
|
|||||||||
|
|
|
|
|
||||||
 |
Asphaltenes |
|
|
|
|
| Asphaltenes
are a class of compounds that may deposit from crude oils. They are polar
compounds which are stabilised in the crude oil by the presence of resins. As
the stabilising action of the resins works through the mechanism of polar
interactions, their effect becomes weaker as the temperature rises, i.e.
flocculation may occur as the temperature increases. However, as the
temperature increases further the asphaltene becomes more soluble in the oil
and the asphaltene re-dissolves. Other effects which may de-stabilise the resin-asphaltene interaction are the addition of light gases (gas injection) or the blending of incompatible crudes. The Infochem asphaltene model is based on the RKSA cubic equation of state with additional terms to describe the association of asphaltene molecules and their solvation by resin molecules. The model is compatible with existing engineering approaches that describe vapour-liquid equilibria and represents a computationally-efficient way of incorporating complex chemical effects into a cubic equation of state. For more information please see our Asphaltene leaflet, case study or publications |
|
| For further information please contact: Dr Beryl Edmonds, Infochem Computer Services Ltd, 13 Swan Court, 9 Tanner Street, London SE1 3LE, UK Tel: +44 20 7357 0800 Fax: +44 20 7407 3927 Email: marketing@infochemuk.com Please send comments and suggestions about our website to info@infochemuk.com This page was last revised in May 2006. |