Pyrolysis of oil extracted safflower seeds: Product evaluation, kinetic and thermodynamic studies

Tahir M. H., Mahmood M. A., ÇAKMAN G., Ceylan S.

BIORESOURCE TECHNOLOGY, vol.314, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 314
  • Publication Date: 2020
  • Doi Number: 10.1016/j.biortech.2020.123699
  • Journal Name: BIORESOURCE TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Compendex, EMBASE, Environment Index, Food Science & Technology Abstracts, Geobase, INSPEC, MEDLINE, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Pyrolysis, Safflower residues, Kinetics, Thermodynamical parameters, Gaseous products, TG-FTIR ANALYSIS, THERMAL-BEHAVIOR, CO-GASIFICATION, STRAW, TEMPERATURE, PARAMETERS, MECHANISM
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

In this study, pyrolysis kinetics and thermodynamic parameters of Safflower residues (SR) obtained from oil extraction were investigated by using TG/DSC-FTIR and py-GC/MS. Thermal analysis was performed from ambient temperature to 750 degrees C under a nitrogen atmosphere. The first-order reaction kinetics model was applied to thermal analysis data to determine apparent kinetic parameters. Activation energy and pre-exponential factor were calculated as 76.60 kJ.mol(-1) and 1.89x10(6) min(-1), respectively. The thermodynamic parameters such as the change in Gibb's free energy, the difference in enthalpy and the entropy change were calculated to be 201.36 kJ mol(-1), 71.79 kJ mol(-1), and -0.196 kJ mol(-1), respectively. TG/FTIR analysis revealed that CO2, C6H5OH, and C=C functional group as the main pyrolysis gas products. According to Py-GC/MS results of SR, the presence of high energy-containing compounds among the pyrolysis products was proved. All these results show that SR is suitable for pyrolysis to produce biofuel and/or chemicals.