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Environmental and Energy Engineering
Characterization of the devolatilization rate of solid fuels in fluidized beds by time-resolved pressure measurements
Article first published online: 27 APR 2011
DOI: 10.1002/aic.12607
Copyright © 2011 American Institute of Chemical Engineers (AIChE)
Additional Information
How to Cite
Solimene, R., Chirone, R. and Salatino, P. (2012), Characterization of the devolatilization rate of solid fuels in fluidized beds by time-resolved pressure measurements. AIChE J., 58: 632–645. doi: 10.1002/aic.12607
Publication History
- Issue published online: 6 JAN 2012
- Article first published online: 27 APR 2011
- Accepted manuscript online: 8 MAR 2011 09:22AM EST
- Manuscript Revised: 4 FEB 2011
- Manuscript Received: 10 AUG 2010
- Abstract
- Article
- References
- Cited By
Keywords:
- devolatilization;
- pyrolysis;
- reaction kinetics;
- fluidized bed;
- coal;
- biomass
Abstract
The characterization of volatile matter (VM) release from solid fuel particles during fluidized-bed combustion/gasification is relevant to the assessment of the reactor performance, as devolatilization rate affects in-bed axial fuel segregation and VM distribution across the reactor. An experimental technique for the characterization of the devolatilization rate of solid fuels in fluidized beds is proposed. It is based on the analysis of the time series of pressure measured in a bench-scale fluidized-bed reactor as VM is released from a batch of fuel particles. A remarkable feature of the technique is the possibility to follow fast devolatilization with excellent time-resolution. A mathematical model of the experiment has been developed to determine the time-resolved devolatilization rate, the devolatilization time and the volume-based mean molecular weight of the emitted volatile compounds. Devolatilization kinetics has been characterized for different solid fuels over a broad range of particle sizes. © 2011 American Institute of Chemical Engineers AIChE J, 2012