Clay concentration and heating rate effect on crude oil combustion by thermogravimetry


Kok M. V.

FUEL PROCESSING TECHNOLOGY, vol.96, pp.134-139, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 96
  • Publication Date: 2012
  • Doi Number: 10.1016/j.fuproc.2011.12.029
  • Title of Journal : FUEL PROCESSING TECHNOLOGY
  • Page Numbers: pp.134-139
  • Keywords: Heavy crude oil, Clay, Thermal analysis, Kinetics, THERMAL-ANALYSIS TECHNIQUES, IN-SITU COMBUSTION, REACTION-KINETICS, PYROLYSIS, OXIDATION, DSC

Abstract

In this research, the effect of heating rate and different clay concentrations on heavy oil combustion was investigated by thermogravimetry (TG-DTG). In TG-DTG experiments, two main distinct reaction regions were identified in all of the crude oil + limestone mixtures; known as low temperature oxidation (LTO) and high temperature oxidation (HTO) respectively. It was observed that addition of clay to porous matrix (limestone + heavy oil) significantly affected the thermal characteristics and kinetics of crude oil. It was also observed that heating rate affected the reaction region intervals, peak and burn-out temperatures. Kinetic analysis of the samples was determined and it was observed that activation energies generated for the high temperature oxidation region for crude oil and crude oil/clay mixtures are in the range of 48.5-151 kimol(-1) at three different heating rates (C) 2011 Elsevier B.V. All rights reserved.