Analytical information on the asphaltenes from a few standard characterization techniques


Peksoz A. , AKAY S. K. , Kaya Y., Ovalioglu H. , Kaynak G., Yalciner A.

Energy Sources, Part A: Recovery, Utilization and Environmental Effects, vol.33, no.15, pp.1474-1481, 2011 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 15
  • Publication Date: 2011
  • Doi Number: 10.1080/15567030903397909
  • Title of Journal : Energy Sources, Part A: Recovery, Utilization and Environmental Effects
  • Page Numbers: pp.1474-1481
  • Keywords: asphaltene, dynamic nuclear polarization, EPR, FTIR, SEM, DYNAMIC NUCLEAR-POLARIZATION, ELECTRON DOUBLE-RESONANCE, SPECTROSCOPY, SUSPENSIONS

Abstract

The asphaltene has been obtained from asphalt cement with penetration grade 60, which is extracted from crude Libya petroleum. The elemental composition and some structural properties of the asphaltene samples are determined by various methods, such as SEM, infrared spectroscopy, and X-ray analysis. Some experiments are performed on 1H dynamic nuclear polarization (DNP) in a number of asphaltene suspensions in organic solvents. The frequency dependence of the DNP enhancement under conditions of weak EPR saturation in a low magnetic field is obtained and interpreted as the EPR line shape of some free radicals present in the samples. Copyright © Taylor & Francis Group, LLC.