The effect of pressure on coal char combustion

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dc.contributor.author Liakos, HH en
dc.contributor.author Theologos, KN en
dc.contributor.author Boudouvis, AG en
dc.contributor.author Markatos, NC en
dc.date.accessioned 2014-03-01T01:17:14Z
dc.date.available 2014-03-01T01:17:14Z
dc.date.issued 2001 en
dc.identifier.issn 1359-4311 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/14409
dc.subject Chemical reaction kinetics en
dc.subject Diffusion en
dc.subject Pressurized char combustion en
dc.subject.classification Thermodynamics en
dc.subject.classification Energy & Fuels en
dc.subject.classification Engineering, Mechanical en
dc.subject.classification Mechanics en
dc.subject.other Air en
dc.subject.other Diffusion in solids en
dc.subject.other Finite volume method en
dc.subject.other Fluidized beds en
dc.subject.other Heat radiation en
dc.subject.other High pressure effects in solids en
dc.subject.other Mass transfer en
dc.subject.other Mathematical models en
dc.subject.other Partial differential equations en
dc.subject.other Pressurization en
dc.subject.other Reaction kinetics en
dc.subject.other Turbulent flow en
dc.subject.other Coal char en
dc.subject.other Coal combustion en
dc.title The effect of pressure on coal char combustion en
heal.type journalArticle en
heal.identifier.primary 10.1016/S1359-4311(00)00100-9 en
heal.identifier.secondary http://dx.doi.org/10.1016/S1359-4311(00)00100-9 en
heal.language English en
heal.publicationDate 2001 en
heal.abstract A two-dimensional, two-phase combustion model of pulverized coal char at elevated pressures is presented in this paper. This is often encountered in furnaces used for power generation, industrial heating and steam production, and for conversion of solids to gas and liquid products. In pressurized circulating fluidized bed boilers, the effect of pressure on char combustion is significant. Of particular importance is to reveal the relative significance of the diffusion and chemical reaction, as controlling mechanisms, and to evaluate the effect of total pressure on the performance of the combustion chamber. The partial differential equations of conservation of mass, momentum and energy are solved taking into consideration turbulent flow, interphase mass- and heat-transfer, radiation and varying operational conditions (e.g. feed of coal and primary and secondary air). The equations are integrated with the finite volume method and are solved for the flow field, temperature field in the gaseous and solid phases and the concentration of reactants and products. The results show that both chemical reaction and diffusion mechanisms control the combustion at elevated pressure. Moreover? the effect of pressure on the reaction kinetics proves to be significant. (C) 2001 Elsevier Science Ltd. All rights reserved. en
heal.journalName Applied Thermal Engineering en
dc.identifier.doi 10.1016/S1359-4311(00)00100-9 en
dc.identifier.isi ISI:000168177400002 en
dc.identifier.volume 21 en
dc.identifier.issue 9 en
dc.identifier.spage 917 en
dc.identifier.epage 928 en

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