Thermal Decomposition of Olive-Mill Byproducts: A TG-FTIR Approach

Małgorzata Wzorek, Robert Junga, Ersel Yilmaz and Bohdan Bozhenko
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Małgorzata Wzorek: Department of Process and Environmental Engineering, Faculty of Mechanical Engineering, Opole University of Technology, 5 Mikołajczyka Str., 45-271 Opole, Poland
Robert Junga: Department of Thermal Engineering and Industrial Facilities, Faculty of Mechanical Engineering, Opole University of Technology, 5 Mikołajczyka Str., 45-271 Opole, Poland
Ersel Yilmaz: Department of Biosystems Engineering, Faculty of Agriculture, Adnan Menderes University, Aydin 09020, Turkey
Bohdan Bozhenko: Department of Mathematics and IT Applications, Faculty of Production Engineering and Logistics, Opole University of Technology, 31 Sosnkowskiego Str., 45-271 Opole, Poland

Energies, 2021, vol. 14, issue 14, 1-16

Abstract: In this study, the combustion of olive byproducts was investigated using the TG-FTIR technique. Different types of olive biomass were considered: twigs, leaves, olive-mill waste from the two-phase decanting method, and wastewater from the three-phase system. The reaction regions, ignition, and burnout temperatures at different heating rates were determined using TG/DTG analysis and the thermogravimetry results. Comprehensive combustion, ignition, burnout, and flammability indexes were also calculated. The highest combustion index values were obtained for waste from the three-phase system, followed by the two-phase decanting method, then with leaves and small twigs. The order of the index values indicated that the sample from the three-phase process ignited more quickly and yielded faster. The changes in activation energy calculated using different model-free isoconversional methods—Friedman, Ozawa–Flynn–Wall, and Kissinger–Akahira–Sunose—fell within the range of 130–140 kJ/kmol. FTIR analyses presented differences in the exhaust gas composition for specific combustion temperature ranges.

Keywords: olive-mill wastes; combustion; thermogravimetry TG/DTG; combustion indexes; kinetics; TG-FTIR (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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