Issue 4, 2022

Structural and gasification kinetic studies on co-pyrolysis chars of coal and biomass

Abstract

The CO2 gasification behaviors of co-pyrolysis chars of coal and biomass were investigated using isothermal thermogravimetry at 950–1150 °C. The TGA results showed that char gasification reactivity with higher biomass composition was better than that with lower biomass composition. The results from BET and XRD indicated that biomass can promote the growth of porous structure and inhibit graphite-like carbon formation during the co-pyrolysis of coal and biomass. An extended random pore model was proposed to define the gasification kinetics of the co-pyrolysis chars. The activation energies (Ea) of chars were observed to be reduced with increasing biomass composition. Meanwhile the synergetic influence of interactions between char/mineral and mineral/mineral on the whole co-gasification process was predicted. The relationship between the gasification reactivity and char characteristics was also analyzed.

Graphical abstract: Structural and gasification kinetic studies on co-pyrolysis chars of coal and biomass

Article information

Article type
Paper
Submitted
03 des 2021
Accepted
01 feb 2022
First published
03 feb 2022
This article is Open Access
Creative Commons BY license

Energy Adv., 2022,1, 225-237

Structural and gasification kinetic studies on co-pyrolysis chars of coal and biomass

L. Liu, J. Zeng, Q. Jiao, S. Ren and J. Yang, Energy Adv., 2022, 1, 225 DOI: 10.1039/D1YA00071C

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