Thermal, kinetics, and oxidation mechanism studies of light crude oils in limestone and sandstone matrix using TG-DTG-DTA: Effect of heating rate and mesh size

Varfolomeev M. A., Nurgaliev D. K., KÖK M. V.

PETROLEUM SCIENCE AND TECHNOLOGY, cilt.34, sa.19, ss.1647-1653, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 34 Sayı: 19
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1080/10916466.2016.1217234
  • Dergi Adı: PETROLEUM SCIENCE AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1647-1653
  • Anahtar Kelimeler: Combustion, crude oil, kinetics, oxidation mechanism, thermal analysis
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

This research was focused on the combustion kinetics and oxidation mechanisms of light crude oils in limestone and sandstone matrices. Similarity of the TGA-DTA curves was produced for different crude oils + limestone or sandstone mixtures indicates that the crude oil undergoes three major transitions, known as low-temperature oxidation, fuel deposition, and high-temperature oxidation when subjected to an oxidizing and constant rate environment. Kinetic analysis of the low- and high-temperature oxidation regions was performed using the ASTM and Arrhenius kinetic methods. In reaction mechanism of the combustion reactions, oxidation mechanisms, and rate-controlling steps of fluid-solid reactions in limestone matrix was also determined. It was observed that the linear behavior at elevated temperatures justifies the assumption that chemical reaction was the controlling step.