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Effect of Heating Rate on the Pyrolysis Behavior and Kinetics of Coconut Residue and Activated Carbon: A Comparative Study

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  • Inamullah Mian

    (Key Laboratory of Coal Clean Conversion and Chemical Process Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830000, China
    State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University, Wuhan 430074, China)

  • Noor Rehman

    (Department of Chemistry, Shaheed Benazir Bhutto University Sheringal, Dir Upper 18000, Khyber Pakhtunkhwa, Pakistan)

  • Xian Li

    (Key Laboratory of Coal Clean Conversion and Chemical Process Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830000, China
    State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University, Wuhan 430074, China)

  • Hidayat Ullah

    (Department of Chemistry, Shaheed Benazir Bhutto University Sheringal, Dir Upper 18000, Khyber Pakhtunkhwa, Pakistan)

  • Abbas Khan

    (Department of Chemistry, Abdul Wali Khan University, Mardan 23200, Khyber Pakhtunkhwa, Pakistan)

  • Chaejin Choi

    (Program in Environmental and Polymer Engineering, Graduate School of INHA University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea)

  • Changseok Han

    (Program in Environmental and Polymer Engineering, Graduate School of INHA University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
    Department of Environmental Engineering, INHA University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea)

Abstract

The pyrolysis process of coconut residue and the activated carbon was investigated using thermogravimetric analysis in the range of 25 to 900 °C, with three altered heating rates: 3, 5, and 10 °C/min. The results of the thermal decomposition showed that it occurred in three distinct phases: dehydration, active pyrolysis, and passive pyrolysis. The derivative thermogravimetric analysis indicated that increasing the heating rate led to a shift in the maximum weight loss rate towards higher temperatures. To better understand the kinetics constraints, the Coats–Redfern method was applied to determine the activation energy ( Ea ) and the frequency factor ( A ). The activation energies for the pyrolysis process varied between 159.57 and 177.45 kJ/mol for RCR and from 132.62 to 147.1 kJ/mol for ACCR at different heating rates. Additionally, the physical properties of the samples were investigated using techniques like scanning electron microscopy and the Brunauer–Emmett–Teller surface analysis. The findings of the study demonstrated that the activation energies of the activated carbon were lower than those of the original biomass. Furthermore, the activation energy values achieved from the D1–D4 models were considered reliable, indicating that the D model was more suitable compared to other models for describing the pyrolysis process and predicting its kinetics.

Suggested Citation

  • Inamullah Mian & Noor Rehman & Xian Li & Hidayat Ullah & Abbas Khan & Chaejin Choi & Changseok Han, 2024. "Effect of Heating Rate on the Pyrolysis Behavior and Kinetics of Coconut Residue and Activated Carbon: A Comparative Study," Energies, MDPI, vol. 17(18), pages 1-11, September.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:18:p:4605-:d:1477746
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    References listed on IDEAS

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    1. Bach, Quang-Vu & Tran, Khanh-Quang & Skreiberg, Øyvind & Trinh, Thuat T., 2015. "Effects of wet torrefaction on pyrolysis of woody biomass fuels," Energy, Elsevier, vol. 88(C), pages 443-456.
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