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Impact of ball-milling and ionic liquid pretreatments on pyrolysis kinetics and behaviors of crystalline cellulose.

Impact of ball-milling and ionic liquid pretreatments on pyrolysis kinetics and behaviors of crystalline cellulose.

Authors :
Jiang, Li-qun
Lin, Qinlu
Lin, Yan
Xu, Fei-xiang
Zhang, Xu
Zhao, Zeng-li
Li, Hai-bin
Source :
Bioresource Technology. Jun2020, Vol. 305, pN.PAG-N.PAG. 1p.
Publication Year :
2020

Abstract

• The kinetic mechanism of cellulose with different physical structure was studied. • The crystalline cellulose required higher activation energy for decomposition. • The decomposition of crystalline cellulose was more concentrated. • A high yield of levoglucosan (64.3 wt%) at 400 °C was obtained from cellulose. In this work, the kinetic mechanisms of pyrolysis of cellulose with different physical structures were illustrated. The crystalline cellulose showed better thermal stability and required higher energy for decomposition with more concentrated reactions due to the highly ordered structure. The crystallinity of the ball milling and ionic liquid pretreated cellulose decreased and the structure was relatively loose and disordered, thereby reducing the thermal stability, so the global activation energy of both samples decreased and the intensive reaction caused by the collapse of structure was alleviated. In fast pyrolysis, crystalline cellulose favored fast pyrolytic saccharification, and the highest levoglucosan yield reached 64.3 wt% at 400 °C. This research was helpful to deduce the influence of physical structure on the pyrolytic product distribution of cellulose, thereby providing useful information to promote the development of pyrolytic saccharification. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09608524
Volume :
305
Database :
Academic Search Index
Journal :
Bioresource Technology
Publication Type :
Academic Journal
Accession number :
142363136
Full Text :
https://doi.org/10.1016/j.biortech.2020.123044