Insights on kinetic triplets and thermodynamic analysis of Delonix regia biomass pyrolysis

D Rammohan; N Kishore; R V S Uppaluri

doi:10.1016/j.biortech.2022.127375

Insights on kinetic triplets and thermodynamic analysis of Delonix regia biomass pyrolysis

Bioresour Technol. 2022 Aug:358:127375. doi: 10.1016/j.biortech.2022.127375. Epub 2022 May 24.

Authors

D Rammohan¹, N Kishore², R V S Uppaluri¹

Affiliations

¹ Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India.
² Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India. Electronic address: nkishore@iitg.ac.in.

PMID: 35623604
DOI: 10.1016/j.biortech.2022.127375

Abstract

The aim of this work was to study the pyrolysis of Delonix regia biomass with non-isothermal thermogravimetric experiments. The targeted objective was to investigate kinetic triplets and thermodynamic parameters. Five iso-conversional methods, namely Differential Friedman, Kissinger-Akahira-Sunose, Ozawa-Flynn-Wall, Starink, and Distributed Activation Energy, have been considered. In the adopted heating rates of 5-55 °C min^-1, the average activation energy and pre-exponential factor varied in the range 202.34-205.89 kJ mol^-1 and 4.98 × 10¹⁷ - 2.04 × 10²⁰ s^-1 respectively. Corresponding average enthalpy and Gibbs free energy varied from 196.84 to 200.87 kJ mol^-1 and from 182.64 to 206.41 kJ mol^-1 respectively. Pyrolysis mechanism have been confirmed by Avrami-Erofeyev (A4), power-law (P2 and P4) and reaction (F1, F2, and ≥ F5) according to Criado's master plots.

Keywords: Criado's plot; Delonix Regia; Kinetic triplets; TGA Analysis; Thermodynamics.

MeSH terms

Biomass
Fabaceae*
Kinetics
Pyrolysis*
Thermodynamics
Thermogravimetry