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Pyrolysis kinetics of potassium-impregnated rubberwood analyzed by evolutionary computation.

Authors :
Lin YY
Chen WH
Colin B
Lin BJ
Leconte F
Pétrissans A
Pétrissans M
Source :
Bioresource technology [Bioresour Technol] 2021 Jan; Vol. 319, pp. 124145. Date of Electronic Publication: 2020 Sep 21.
Publication Year :
2021

Abstract

To explore the catalytic effect of potassium on pyrolysis characteristics of biomass, the rubberwood is pyrolyzed by a thermogravimetric analyzer. The samples are impregnated by three concentrations of potassium carbonate (0.004 M, 0.008 M, and 0.012 M). The pyrolysis kinetics is analyzed by an independent parallel reaction (IPR) model to describe the catalytic effect on the four-pseudo components model in the rubberwood. The particle swarm optimization (PSO) is adopted to optimize the fit quality between the established kinetic models and experimental data. It is found that the pyrolysis of rubberwood impregnated with 0.012 M concentration of K <subscript>2</subscript> CO <subscript>3</subscript> can reduce the activation energy of cellulose from 223.86 to 204.14 kJ mol <superscript>-1</superscript> , whereas there is no obvious effect on the activation energies of hemicelluloses and lignin. The starting temperature and ending temperature of cellulose thermodegradation also move toward lower temperatures, indicating that the addition of potassium enhances the degradation of cellulose.<br /> (Copyright © 2020 Elsevier Ltd. All rights reserved.)

Details

Language :
English
ISSN :
1873-2976
Volume :
319
Database :
MEDLINE
Journal :
Bioresource technology
Publication Type :
Academic Journal
Accession number :
32979598
Full Text :
https://doi.org/10.1016/j.biortech.2020.124145