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Kinetic study of Chinese biomass slow pyrolysis : Comparison of different kinetic models

Title data

Hu, Song ; Jess, Andreas ; Xu, Minhou:
Kinetic study of Chinese biomass slow pyrolysis : Comparison of different kinetic models.
In: Fuel. Vol. 86 (2007) Issue 17–18 . - pp. 2778-2788.
ISSN 0016-2361
DOI: https://doi.org/10.1016/j.fuel.2007.02.031

Official URL: Volltext

Abstract in another language

The slow pyrolysis of six Chinese biomasses was studied by thermogravimetric experiments. Non-linear square fitting method is used to calculate DTG data. The analysis results show that it is not possible to exactly represent the biomass pyrolysis by a one-step model with different mechanisms. Thus, three-pseudocomponent models were used to simulate the biomass pyrolysis. It was found that the three-pseudocomponent model with n-order kinetics (model II) is more accurate than the model with first-order kinetics (model I). Activation energies of three-pseudocomponents in model II are bigger than the values in model I. It is shown that model II yields the best simulation results, especially with respect to describe accurately the pyrolysis of the first pseudocomponent (hemicellulose) and the last one (lignin). Nevertheless, with regard to a practical utilization, the three-pseudocomponent model with a reaction order of one could be used, because the accuracy to represent biomass pyrolysis is high enough. Unrealistic high values of the reaction order are avoided, and thus this model is more realistic with respect to the chemical interpretation of the reaction order.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Biomass; Pyrolysis; Ozawa method; Three-pseudocomponent model
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Chemical Engineering
Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Research Institutions
Research Institutions > Research Units
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 27 Apr 2015 06:52
Last Modified: 17 May 2017 07:26
URI: https://eref.uni-bayreuth.de/id/eprint/11173