Burning characteristics of single particles of coal and wood mixtures for co-firing in an upward-flowing hot gas stream

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dc.contributor.authorMock, Chinsung
dc.contributor.authorLee, Hookyung
dc.contributor.authorChoi, Sangmin
dc.contributor.authorYang, Won
dc.contributor.authorManovic, Vasilije
dc.date.accessioned2017-04-20T10:08:41Z
dc.date.available2017-04-20T10:08:41Z
dc.date.issued2017-04-14
dc.description.abstractThis study presents the comparative burning behaviours of single solid particles of coal and biomass mixtures for co-firing. In this experimental investigation, a direct observation approach was used to investigate the ignition, flame characteristics and combustion times by means of high-speed photography at 7000 frames per second. Single particles were entrained into a hot gas stream at 1340 K and a rapid heating rate of 104–105 K/s. The apparent volatile flames from the prepared particle size groups were observed within 20–50 ms. To assess the effect of oxygen concentration, particles were burned for their flame characteristics in a range of 10%–40% O2. The test particles were sieved into three size groups (215–255 μm, 255–300 μm and 300–350 μm) to assess the effect of particle size. Special particles for the co-firing effect were collected individually from two types of mixed pellet: 20:80 and 50:50 coal/wood. Pure sub-bituminous coal and wood particles were also prepared in order to compare their combustion behaviours. In the experimental setup with a cross-injection configuration, sequential combustion processes were effectively and clearly described in terms of particle displacement with time. The experimental results showed distinguishable flame characteristics from single particles of coal, 50:50 coal/wood, 20:80 coal/wood and wood, including soot flame size and intensity. The impact of high coal-blending ratio caused an increase in the flame size and intensity and the ignition time was close to that of pure coal particles. Quantitative measurements of combustion events on co-firing particles were also discussed in relation to significant impacts of the particle size and the oxygen concentration.en_UK
dc.identifier.citationMock C, Lee H, Choi S, et al., (2017) Burning characteristics of single particles of coal and wood mixtures for co-firing in an upward-flowing hot gas stream, Fuel Processing Technology, Volume 163, August 2017, pp. 20 – 34.en_UK
dc.identifier.issn0378-3820
dc.identifier.urihttp://doi.org/10.1016/j.fuproc.2017.03.030
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/11789
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleBurning characteristics of single particles of coal and wood mixtures for co-firing in an upward-flowing hot gas streamen_UK
dc.typeArticleen_UK

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