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Energy Sources, Part A: Recovery, Utilization, and Environmental Effects Volume 33, 2011 - Issue 15
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Original Articles

Analytical Information on the Asphaltenes from a Few Standard Characterization Techniques

A. Peksoz Department of Physics, Sciences and Arts Faculty, Uludag University, Gorukle-Bursa, Turkey
,
S. K. Akay Department of Physics, Sciences and Arts Faculty, Uludag University, Gorukle-Bursa, Turkey
,
Y. Kaya Department of Chemistry, Sciences and Arts Faculty, Uludag University, Gorukle-Bursa, Turkey
,
H. Ovalioglu Department of Physics, Sciences and Arts Faculty, Uludag University, Gorukle-Bursa, Turkey
,
G. Kaynak Department of Physics, Sciences and Arts Faculty, Uludag University, Gorukle-Bursa, Turkey
&
A. Yalciner Department of Physics, Sciences and Arts Faculty, Uludag University, Gorukle-Bursa, Turkey
Pages 1474-1481 | Received 31 Jul 2009, Accepted 08 Oct 2009, Published online: 19 May 2011
 
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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.

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