Interaction and Kinetics Study of the Co-Gasification of High-solid Anaerobic Digestate and Lignite

This study aims at investigating the interaction and kinetics behavior of the co-gasification of digestate and lignite. The co-pyrolysis performances of digestate and lignite blended by dry process were better than that blended by wet process, while the wet-blending process could improve the perform...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2020-01, Vol.25 (3), p.459
Main Authors: Chang, Shengqiang, Zhang, Zhikai, Cao, Lixia, Ma, Liqiang, Wang, Fang, Li, Jihui, Li, Wangliang
Format: Article
Language:English
Subjects:
Adsorption
Alternative energy sources
Anaerobic digestion
Anaerobiosis
Biogas
Biomass
blending method
Cellulose
co-gasification
Coal
digestate
Downdraft
Energy efficiency
Fixed beds
Gasification
Growth models
Industrial plant emissions
interaction
Kinetics
Lignin
Lignite
Lignocellulose
Methods
Pathogens
Phenols
Pyrolysis
Raw materials
Reaction kinetics
Thermogravimetric analysis
Thermogravimetry
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Summary:This study aims at investigating the interaction and kinetics behavior of the co-gasification of digestate and lignite. The co-pyrolysis performances of digestate and lignite blended by dry process were better than that blended by wet process, while the wet-blending process could improve the performance in co-gasification stage because of the larger pore diameter and pore volume. When anaerobic digestion (AD) time was 40 days, the synergistic interaction between digestate and lignite were the most remarkable based on the results of thermogravimetric analysis (TG) and the experiments in the lab-scale downdraft fixed bed gasifier. Kinetics study showed that the increase of AD time and the addition of digestate in lignite decreased the activation energy of the co-gasification reaction.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules25030459