The temporal variation of asphaltene structure during Raman crude oil pyrolysis

Akmaz S., Yasar M.

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, vol.113, pp.672-679, 2015 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 113
  • Publication Date: 2015
  • Doi Number: 10.1016/j.jaap.2015.04.017
  • Journal Name: JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.672-679
  • Keywords: Heavy oil, Asphaltene, Pyrolysis, Maltene, Coke, THERMAL-CRACKING, CHEMICAL-COMPOSITION, REACTION ENVIRONMENT, PETROLEUM RESIDUE, REACTION PATHWAYS, VACUUM RESIDUES, DELAYED COKING, KINETICS
  • Istanbul University-Cerrahpasa Affiliated: No

Abstract

In this study, the investigation of pyrolysis reactions of heavy oil was aimed. Heavy oil that was provided from Raman field in the southeastern part of Turkey to use in our study, was subjected to pyrolysis at temperatures of 350, 400 and 450 degrees C for holding times ranging from 10 to 120 min using sand bath. Product fractions were separated as gas, maltene, light maltene, asphaltene and coke. The time and temperature dependence of product distributions were determined. Molecular structure of asphaltenes are characterized by elemental analysis, proton nuclear magnetic resonance (H-1 NMR), gel permeation chromatography (GPC). The effect of the heavy oil environment on the asphaltene pyrolysis was also investigated in this study. (C) 2015 Elsevier B.V. All rights reserved.