ISBN 9783843932417

978-3-8439-3241-7, Reihe Verfahrenstechnik

Christian Bühl
Prediction of Interfacial Properties Substantial to Natural Resources

240 Seiten, Dissertation Karlsruher Institut für Technologie (2017), Softcover, A5

Zusammenfassung / Abstract

Nowadays, crude oil and gas play an important role for human society. Due to various applications and limited availability of these natural resources an efficient production is of major relevance. In common production, water as drive fluid is injected into the well. In many cases an additional fluid is mixed with water to increase the yield. One possibility is the addition of carbon dioxide. This technique allows the storage of the climate-damaging carbon dioxide, coincidently.

Regarding natural resources, one challenge of the production process is induced by the nature of crude oil/gas. Besides many hydrocarbons, harmful substances - particularly sulphur containing gases - are present.

Apart from nature of the deposit, phase equilibria and surface properties of the medium in contact to the chosen drive fluid, impact production massively. Hence, thorough investigations of crude oil/gas mixtures are necessary to guarantee an efficient production. Due to the various constituents and the mentioned harmful substances, experimental investigations are very expensive.

In this work, phase behaviour as well as surface properties relevant to crude oil/gas production and processing are investigated theoretically. For modelling, PCP-SAFT equation of state in combination with density gradient theory are used. Considering surface properties of mixtures relevant to production of natural resources, this model was established in the past. Due to the poor availability of experimental data the focus is set to binary, ternary and quaternary mixtures of sulphur containing compounds, carbon dioxide and n-alkanes.