Thermal characterization, combustion and kinetics of different origin crude oils

Gundogar A. S., KÖK M. V.

FUEL, cilt.123, ss.59-65, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 123
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.fuel.2014.01.058
  • Dergi Adı: FUEL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.59-65
  • Anahtar Kelimeler: Crude oil combustion, Thermal analysis, Kinetics, Model free methods, Model fitting methods, LOW-TEMPERATURE-OXIDATION, SARA FRACTIONS, MODEL-FREE, BEHAVIOR, THERMOGRAVIMETRY, ACTIVATION, DEGRADATION, PYROLYSIS, ENERGY
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

In this research, the combustion behavior of six Turkish crude oils (light and medium type) was investigated by thermogravimetry/derivative thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC) methods under atmospheric air in the absence of rock matrix. Two main reaction intervals were observed on all thermograms known as low temperature oxidation (LTO) and high temperature oxidation (HTO) regions. The resulting curves showed that the mass loss under combustion is accompanied by exothermic peaks due to the oxidative degradation of crude oil components. Heavier oils with greater asphaltene content were exposed to more heat release during oxidation reactions. By the increment of heating rate, not a remarkable variation was observed in apparent activation energies whereas the heat emission of crude oils decreased. Based on the model free and model fitting kinetic approaches, heavier oils had higher apparent activation energy and Arrhenius constant values for all oxidation regions. (C) 2014 Elsevier Ltd. All rights reserved.