African Journal of
Pure and Applied Chemistry

  • Abbreviation: Afr. J. Pure Appl. Chem.
  • Language: English
  • ISSN: 1996-0840
  • DOI: 10.5897/AJPAC
  • Start Year: 2007
  • Published Articles: 363

Full Length Research Paper

Comparison of low temperature coal tar solvent extractible and bound biomarker distribution for correlation studies

Ivwurie, W.1*, Snape, C. E.2 and Sun, C.2
1Department of Chemistry, Federal University of Petroleum Resources, Effurun, Delta State, Nigeria. 2Nottingham Fuel and Energy Centre, The University of Nottingham, University Park, Nottingham, United Kingdom.
Email: [email protected]

  •  Accepted: 10 August 2011
  •  Published: 30 September 2011


Solvent extractible and bound biomarker profile for low temperature coal tar were compared using the biomarker ratios obtained from the selective ion resolution for pristane, phytane, n-C17 and hopanesratios of GC-MS results, with a view to ascertaining whether or not the data for asphaltene-derived biomarker can be used for effective correlation studies, and if serious alterations arising from biodegradation and other environmental factors could affect the use of the solvent extractible ones. The pristane/phytane, pr/n-C17 ratios and carbon preference index are 4.0, 1.1 and 0.9, respectively for the free aliphatics and 4.2, 1.2 and 1.2 for the bound. These values are quite similar to each other. The hopanes are less mature for the bound than for the free, this is a general trend found for most hydropyrolysis products. 

Key words: Biomarker, coal tar, asphaltene.