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A study on coal blending for reducing NOx and N2O and levels during fluidized bed combustion

dc.contributor.authorBoavida, D.por
dc.contributor.authorAbelha, P.por
dc.contributor.authorGulyurtlu, I.por
dc.contributor.authorValentim, B.por
dc.contributor.authorLemos de Sousa, M. J.
dc.date.accessioned2007-10-04T09:20:49Zpor
dc.date.accessioned2011-10-06T14:41:21Z
dc.date.available2007-10-04T09:20:49Zpor
dc.date.available2011-10-06T14:41:21Z
dc.date.issued2004por
dc.description.abstractThe objective of the study was to investigate the effect of blending on the emissions of NOx and N2O during the fluidized bed combustion of five coals with different levels of nitrogen, volatile matter, and fixed carbon contents, and diverse coal and char petrographic composition. The devolatilization chars were produced in a fluidized bed combustor. Using the petrographic analyses of the coals, sixteen coal blends were made to carry out the combustion tests. The combustion of individual coals and the sixteen blends was carried out in an electrically heated atmospheric fluidized bed combustor. The emissions of NOx reached maximum values at a bed temperature around 1173 K and decreased with lower combustion temperatures. The amount of nitrous oxide formed decreased, for all five coals, as the bed temperature increased from 1053 to 1303 K. These trends are consistent with the observed experimental data obtained by other researchers. It was observed that for ratios of 1.3 to 1.6 of fixed carbon to volatile matter, both NOx and N2O emission levels were minimal and, outside this range, both oxides showed a sharp increase in their formation/emissions. The coal blends were also found to show similar trends with increasing the bed temperatures. The results serve to establish the relative importance of volatile and fixed carbon reactivity and coal and char petrography, which is believed to significantly contribute to devolatilization mechanisms and char reactivity.por
dc.identifier.citationClean Air. Vol. 5 (2004), pp. 175–191por
dc.identifier.urihttp://hdl.handle.net/10284/295por
dc.language.isoengpor
dc.publisherBegell Housepor
dc.relation.ispartofseriesClean Airpor
dc.relation.ispartofseriesVol. 5por
dc.subjectNOxpor
dc.subjectN2Opor
dc.subjectCoal blendspor
dc.subjectFluidized bed combustion (FBC)por
dc.titleA study on coal blending for reducing NOx and N2O and levels during fluidized bed combustionpor
dc.typejournal article
dspace.entity.typePublication
person.familyNameLemos de Sousa
person.givenNameManuel João
person.identifier.ciencia-idD513-C4C7-E740
person.identifier.orcid0000-0001-6527-6196
person.identifier.scopus-author-id6602492063
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication580f4519-5525-4616-8174-c912b1a3c88f
relation.isAuthorOfPublication.latestForDiscovery580f4519-5525-4616-8174-c912b1a3c88f

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