 Influence of particle sizes on combustion characteristics of coal particles in oxygen-deficient atmosphereKunlin Cong, Yanguo Zhang, Feng Han and Qinghai Li Energy, 2019, vol. 170, issue C, 840-848 Abstract: The combustion characteristics of coal samples with different particle size were investigated using a thermogravimetric analyzer. Three different heating rates were set in the oxygen-deficient atmosphere of 12 vol % oxygen concentration. Experiments were conducted on four particle sizes with a diameter of 0.6, 1.0, 2.0, and 4.0 mm. It was found that ignition and burnout temperatures of coals rose approximately linearly with the increasing particle size. The ignition temperature of the coal with a diameter of 4.0 mm (482 °C–520 °C) varied greatly at different heating rates compared with that of 0.6 mm (473 °C–481 °C). The effect of particle size on the ignition temperature decreased with the increase in heating rate, while the effect on the burnout temperature was promoted. The calculation of the combustion index and the results of the kinetic analysis indicated that the reactivity decreased as the coal particle size increased. The results of this paper can provide guidelines for the development of a staged fuel-feeding horizontal circulating fluidized bed boiler. Keywords: Coal; Particle size; Combustion characteristics; Thermogravimetric; Oxygen-deficient combustion; Staged fuel-feeding (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:170:y:2019:i:c:p:840-848 DOI: 10.1016/j.energy.2018.12.216 Access Statistics for this article Energy is currently edited by Henrik Lund and Mark J. Kaiser More articles in Energy from Elsevier |
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