Comparative pyrolysis behaviors of stalk, wood and shell biomass: Correlation of cellulose crystallinity and reaction kinetics. (August 2020)

• Record Type: Journal Article
• Authors: Chen, Hanping; Liu, Zihao; Chen, Xu; Chen, Yingquan; Dong, Zhiguo; Wang, Xianhua; Yang, Haiping
• Is Part Of: Bioresource technology. Volume 310(2020)
• Publication Date: 2020-08
• Subjects: Biomass -- Cellulose crystallinity -- Pyrolysis characteristics -- Kinetics -- Activation energy; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2020.123498
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: The pyrolysis process of stalk-type biomass differs from wood/shell-type biomass. Low cellulose crystallity causes the overlapping peak in stalk-type biomass pyrolysis. Cellulose crystallity has positive correlation with peak temperature of cellulose. Cellulose crystallity affects the activation energy at hemicellulose/cellulose stage. Abstract: In this study, the pyrolysis process of 20 kinds of biomass samples in 3 types (stalk-type, wood-type and shell-type) was investigated with thermogravimetric analyzer, and the correlation of biomass pyrolysis property with biomass chemical structure was put forward. The results showed that the pyrolysis of the 20 kinds of biomass can be classified by types as the pyrolysis of stalk-type biomass had an overlapping decomposition peak of hemicellulose and cellulose at 317 °C. However, the pyrolysis of wood-type and shell-type biomass showed two separated peaks at low temperature and the cellulose peak was higher in wood-type biomass (365 °C) compared to shell-type biomass (348 °C). The different pyrolysis process mentioned above could be due to the positive correlation between cellulose crystallinity and the decomposition temperature of cellulose as well as the activation energy at the decomposition stage of cellulose.