Prediction of high-temperature rapid combustion behaviour of woody biomass particles

Li, J., Paul, M. , Younger, P. L. , Watson, I. , Hossain, M. and Welch, S. (2016) Prediction of high-temperature rapid combustion behaviour of woody biomass particles. Fuel, 165, pp. 205-214. (doi: 10.1016/j.fuel.2015.10.061)

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Biomass energy is becoming a promising option to reduce CO2 emissions, due to its renewability and carbon neutrality. Normally, biomass has high moisture and volatile contents, and thus its combustion behaviour is significantly different from that of coal, resulting in difficulties for large percentage biomass co-firing in coal-fired boilers. The biomass combustion behaviour at high temperatures and high heating rates is evaluated based on an updated single particle combustion model, considering the particle size changes and temperature gradients inside particle. And also the apparent kinetics determined by high temperature and high heating rate tests is employed to predict accurate biomass devolatilization and combustion performances. The time-scales of heating up, drying, devolatilization, and char oxidation at varying temperatures, oxygen concentrations, and particle sizes are studied. In addition, the uncertainties of swelling coefficient and heat fractions of volatile combustion absorbed by solid on the devolatilization time and total combustion time are discussed. And the characterised devolatilization time and total combustion time are finally employed to predict the biomass combustion behaviour. At the last, a biomass combustion/co-firing approach could be expected to achieve a better combustion performance towards large biomass substitution ratios in existing coal-fired boilers.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Paul, Professor Manosh and Li, Dr Jun and Watson, Dr Ian and Younger, Professor Paul
Authors: Li, J., Paul, M., Younger, P. L., Watson, I., Hossain, M., and Welch, S.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Fuel
Publisher:Elsevier B.V.
ISSN (Online):1873-7153
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Fuel 165:205-214
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
618711Impact Acceleration Account (IAA - EPSRC)Jonathan CooperEngineering & Physical Sciences Research Council (EPSRC)EP/K503903/1VICE PRINCIPAL RESEARCH & ENTERPRISE