Saeed, MA, Andrews, GG, Phylaktou, HN et al. (3 more authors) (2015) Flame Propagation of Pulverised Biomass Crop Residues and their Explosion Characteristics. In: Radulescu, MI, (ed.) Proceedings of 25th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS). 25th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS), 02-07 Aug 2015, University of Leeds, Leeds, UK. ICDERS
Abstract
Pulverised agricultural crop residues were investigated using the ISO 1 m3 turbulent explosion vessel. This was modified to enable the spherical flame propagation flame speed and the heat release rate in MW/m2 to be determined. From the turbulent flame speed, the laminar flame speed and laminar burning velocity and global heat release, MW/m2, were determined. In addition the equipment was used to determine the biomass explosibility, Kst (= dP/dtmaxV1/3), and the minimum explosion concentration (MEC). Two Pakistani crop residues bagasse (B) and wheat straw (WS) were investigated. Particle size distribution, elemental and proximate analysis and surface morphology for the raw powders and for their post explosion residues were carried out. It was found that these crop residues have explosibility characteristics comparable to wood biomass powders. MEC values as low as equivalence ratios of 0.18 to 0.3 were found which were lower than for gaseous hydrocarbons, but similar to other measurements for biomass using the Hartmann explosibility equipment. Peak turbulent flame speeds were measured at 3-4 m/s. There was a significant post explosion residue of unburned material which was shown to have an increase in char content relative to the raw biomass, while the volatile content was reduced. The BET surface area of the post explosion residue of bagasse was higher than that of the wheat straw residue, showing a higher release of volatiles for bagasse with a more porous char residue in the burnout indicating higher reactivity. These crop residues are a viable renewable fuel for existing coal power plants or as a basis for a new generation of small scale steam power generators in Pakistan.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Keywords: | Explosibility; Flame speed; Renewable |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Energy Research Institute (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 19 Aug 2015 08:10 |
Last Modified: | 15 Jan 2018 23:05 |
Published Version: | http://www.engineering.leeds.ac.uk/short-courses/I... |
Status: | Published |
Publisher: | ICDERS |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:89061 |