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Use of chemical fractionation to understand partitioning of biomass ash constituents during co-firing in fluidized bed combustion

dc.contributor.authorTeixeira, P. Alexandra
dc.contributor.authorLopes, Helena
dc.contributor.authorGulyurtlu, Ibrahim
dc.contributor.authorLapa, Nuno
dc.date.accessioned2014-05-14T10:52:17Z
dc.date.available2014-05-14T10:52:17Z
dc.date.issued2012
dc.description.abstractThree species of biomass origin (straw pellets, olive cake and wood pellets) and two coals from different countries (Coal Polish and Coal Colombian) have been studied to understand the fate of their ash forming matter during the combustion process and to investigate the influence of co-firing biomass with coal. Three different approaches to investigate the ash behaviour were employed: (1) chemical fractionation analysis to evaluate the association/reactivity of ash forming elements in the fuels as a prediction tool, (2) establishment of elements partitioning in ash streams produced in the combustion and co-combustion trials, and (3) evaluation of enrichment factors of elements in the ash streams. The chemical fractionation analysis was applied to all fuels used to evaluate how the association/reactivity of elements making up ash may influence their behaviour during combustion. Combustion tests were carried out on a pilot scale fluidized bed combustor (FBC). Four ash streams were obtained at different locations. The uncertainty of measurements was estimated allowing a critical evaluation of mass balances over the combustion system and the partitioning of elements in the ash streams. The enrichment factors of elements in the several ash streams were estimated, incorporating uncertainties associated with analytical measurements. Results obtained showed that for FBC the relation between the chemical fractionation and the experimental partitioning is strongly affected by elutriation of particles. The element enrichment factor estimated for each ash stream, using Al as a reference element, revealed better correlations with the elements reactivity obtained by chemical fractionation because it overcomes particles elutriation effects. Nevertheless, it was observed that the reactivity estimated by chemical fractionation could not be solely interpreted as tendency of the elements to volatilize on FBC system, as reaction in bed zone of boiler may also occur retaining reactive elements.por
dc.identifier.citationTeixeira, P.; Lopes, H.; Gulyurtlu, I.; Lapa, N. Use of chemical fractionation to understand partitioning of biomass ash constituents during co-firing in fluidized bed combustion. In: Fuel, 2012, Vol. 101, p. 215-227por
dc.identifier.issn0016-2361
dc.identifier.urihttp://hdl.handle.net/10400.9/2476
dc.language.isoengpor
dc.publisherElsevierpor
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.fuel.2011.07.020por
dc.subjectChemical fractionationpor
dc.subjectPartitioningpor
dc.subjectAshespor
dc.subjectBiomasspor
dc.subjectCo-firingpor
dc.titleUse of chemical fractionation to understand partitioning of biomass ash constituents during co-firing in fluidized bed combustionpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage227por
oaire.citation.startPage215por
oaire.citation.titleFuelpor
oaire.citation.volume101por
person.familyNameLopes
person.familyNameLapa
person.givenNameHelena
person.givenNameNuno
person.identifier90528
person.identifier.ciencia-id5A14-EADB-672D
person.identifier.orcid0000-0001-9378-5254
person.identifier.orcid0000-0001-7862-7477
person.identifier.ridL-4824-2017
person.identifier.ridK-8456-2013
person.identifier.scopus-author-id18437851600
person.identifier.scopus-author-id6602694802
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationab9b3ab7-7989-40cc-adb4-b2ace14451ca
relation.isAuthorOfPublication59ceb800-1000-4455-8fe9-276d309bcc4a
relation.isAuthorOfPublication.latestForDiscovery59ceb800-1000-4455-8fe9-276d309bcc4a

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