Thermokinetic analysis of coconut husk conversion by pyrolysis process

Research output: Contribution to journalConference articlepeer-review

Abstract

The energy produced from agricultural wastes by pyrolysis can replace fossil fuels in many applications. Therefore, to make the process more efficient and optimal, an understanding of the kinetic and thermodynamic behaviour is required before progressing to pyrolytic applications. Thus, this study investigates the pyrolysis thermokinetic of coconut husk under varied heating conditions in nitrogen environment. Three model-free approaches, which are; Kissinger-Akahira-Sunose (KAS), Distributed Activation Energy Model (DAEM), Ozawa-Flynn-Wall (FWO) were deployed to analyse the kinetic parameters. The temperature range for the maximum devolatilization was found to be between 200 and 380 C. Average activation energy was obtained based on various model free approaches with KAS, DEAM and FWO having a value of 99.15 kJmol− 1, 99.15 kJmol− 1 and 103 kJmol− 1 respectively. The comparison between activation energy, Ea and change in enthalpy ΔH showed that average energy barrier is low with a value of 4.85 kJmol− 1 for all methods. Further, maximum values of thermodynamic parameters, such as change in enthalpy, and Gibbs free energy were estimated at 98.49 kJmol− 1, 158.50 kJmol− 1 respectively. Overall, kinetic, and thermodynamic analysis shows that coconut husk has potential for bioenergy production through pyrolysis.

Original languageEnglish
Pages (from-to)194-200
Number of pages7
JournalMaterials Today: Proceedings
Volume105
Issue numberC
DOIs
Publication statusPublished - 2022
EventInternational Conference on Engineering for a Sustainable World, ICESW 2022 - Johor, Malaysia
Duration: 19 May 202220 May 2022

Keywords

  • Bioenergy production
  • Coconut husks
  • Kinetics
  • Model-free approaches
  • Thermodynamics

ASJC Scopus subject areas

  • General Materials Science

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