Pyrolysis Characteristics of Empty Fruit Bunches at Different Temperatures and Heating Rates

Hyeongtak Ko, Myeongjong Lee, Rumduol Sen, Jeongwoo Choi and Seacheon Oh ()
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Hyeongtak Ko: Department of Environmental Engineering, Kongju National University, Cheonan 31080, Chungcheongnam-do, Republic of Korea
Myeongjong Lee: Department of Environmental Engineering, Kongju National University, Cheonan 31080, Chungcheongnam-do, Republic of Korea
Rumduol Sen: Department of Environmental Engineering, Kongju National University, Cheonan 31080, Chungcheongnam-do, Republic of Korea
Jeongwoo Choi: Department of Environmental Engineering, Kongju National University, Cheonan 31080, Chungcheongnam-do, Republic of Korea
Seacheon Oh: Department of Environmental Engineering, Kongju National University, Cheonan 31080, Chungcheongnam-do, Republic of Korea

Energies, 2025, vol. 18, issue 6, 1-18

Abstract: EFB is a biomass waste primarily generated in Southeast Asia, and its pyrolysis enables both waste management and conversion into valuable products. In pyrolysis, the heating rate is a crucial factor; however, studies on its influence on EFB are extremely limited. This study investigates the pyrolysis characteristics of EFB by analyzing product properties based on reaction temperature and heating rate. TGA showed that the thermal decomposition of EFB begins at approximately 210 °C and is largely complete by 400 °C. Furthermore, kinetic analysis using TGA data, applying both differential and integral methods, revealed distinct trends. Through pyrolysis experiments using a fixed-bed reactor, the yield analysis of products under varying reaction temperatures and heating rates demonstrated that higher temperatures promote pyrolysis, leading to a decrease in biochar yield and an increase in gas product yield. For liquid products, a higher heating rate suppressed secondary reactions and led to an increase in the yield of the aqueous phase. Gas product characterization revealed that CO and CO 2 formation began simultaneously at approximately 270 °C. GC-MS analysis of the liquid products recovered under different pyrolysis conditions showed that most compounds contained oxygen, originating from hemicellulose, cellulose, and lignin. Additionally, FT-IR analysis of the biochar confirmed that oxygen-containing functional groups decomposed as pyrolysis progressed, and the presence of turbostratic carbon and crystallinity influenced by trace inorganic elements was identified.

Keywords: empty fruit bunch (EFB); pyrolysis; fixed-bed reactor; bio-crude oil; kinetics (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: 2025
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