Mason, PE, Jones, JM orcid.org/0000-0001-8687-9869, Darvell, LI orcid.org/0000-0002-4119-8485 et al. (1 more author) (2017) Gas phase potassium release from a single particle of biomass during high temperature combustion. Proceedings of the Combustion Institute, 36 (2). pp. 2207-2215. ISSN 1540-7489
Abstract
A notable characteristic of solid biomass fuels as compared to coal is their significantly higher potassium content. Potassium influences ash deposition and corrosion mechanisms in furnaces and boilers, the effects of which may differ depending on phase transformations of potassium species in the gas phase and condensed phase. An understanding of how potassium is released from biomass fuels during the combustion process is therefore useful for plant designers and operators assessing means of avoiding or mitigating these potential problems. An experimental method is used to measure release patterns from single particles of biomass fuels using flame emission spectroscopy and a single-particle combustion rig. The experimental arrangement also allowed simultaneous thermal imaging of the combusting particle in order to determine the surface temperature. A model of the single particle combustion is presented. Using experimental data on devolatilisation and burnout times for different sized particles and the measured surface temperature profiles, the thermal and kinetic sub-models are verified. A model for potassium release is described and this is integrated to the single particle combustion model to allow prediction of the temporal patterns of release of gas-phase potassium. The modelled release patterns were compared with those observed. Good agreement between modelled and measured potassium release patterns was attained confirming that the proposed mechanisms affecting potassium release are valid.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2016 The Authors. Published by Elsevier Inc. on behalf of The Combustion Institute. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY). |
Keywords: | Biomass; Combustion; single-particle; modelling; Potassium |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) |
Funding Information: | Funder Grant number EPSRC RF030440 - EP/K02115X/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Jun 2016 11:46 |
Last Modified: | 30 Jun 2020 14:48 |
Published Version: | https://doi.org/10.1016/j.proci.2016.06.020 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.proci.2016.06.020 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:100598 |