A kinetic approach to the temperature-programmed pyrolysis of Turkish oil shales in a fixed bed reactor: Determination of kinetic parameters for n-paraffins and 1-olefins evolution


Ballice L. , YUKSEL M.

ENERGY & FUELS, vol.16, no.1, pp.96-101, 2002 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 1
  • Publication Date: 2002
  • Doi Number: 10.1021/ef010077o
  • Title of Journal : ENERGY & FUELS
  • Page Numbers: pp.96-101

Abstract

The thermal degradation of both Goynuk oil shales (GOS) and Beypazari oil shales (BOS) has been investigated under nonisothermal conditions. The recovery of organic carbon as 1-olefins and n-paraffins was determined by temperature-programmed pyrolysis of oil shales. A fixed bed reactor under argon flow was used to pyrolyze small samples of oil shales. A special gas-phase sampling technique was used to determine the composition of products eluted from the reactor as a function of temperature and time. Hydrocarbon evolution data have been analyzed by Coats-Redfern and Chen-Nuttall combinations. It must be emphasized that the evaluation of temperature-programmed pyrolysis data by combined use of Coats-Redfern and Chen-Nuttall methods provide satisfactory mathematical approaches to obtain kinetic parameters for 1-olefins and n-paraffins formation from thermal degradation of Turkish oil shales. Using this method, it is possible to identify every stage of pyrolysis and derive values for kinetic parameters.