DSC and rheometry investigations of crude oils

KÖK M. V., Letoffe J., Claudy P.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, vol.56, no.2, pp.959-965, 1999 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 56 Issue: 2
  • Publication Date: 1999
  • Doi Number: 10.1023/a:1010159718321
  • Journal Name: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.959-965
  • Keywords: crude oil, differential scanning calorimeter, rheology, viscometer, WAX PRECIPITATION, FLOW PROPERTIES, DISSOLUTION
  • Middle East Technical University Affiliated: Yes

Abstract

Thermal characteristics and rheological behaviour of eight crude oils covered a wide range of fluid composition and properties were studied by differential scanning calorimeter (DSC) and viscometry. Wax appearance temperatures (WAT) of crude oils were determined by DSC and viscometry. Good agreement is obtained between the results. The dynamic viscosity in the Newtonian temperature range of the crude oils (above 30 degrees C) generally obeyed a simple first-order Arrhenius type of temperature dependence. Activation energies of flow in the non-Newtonian range are not uniquely defined.