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Comparison of co-gasification of wastes mixtures obtained from rice production wastes using air or oxygen

2015Journal article Open access
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dc.contributor.authorPinto, Filomena
dc.contributor.authorAndre, Rui N.
dc.contributor.authorLopes, Helena
dc.contributor.authorNeves, Diogo
dc.contributor.authorVarela, Francisco
dc.contributor.authorSantos, João Navalho
dc.contributor.authorMiranda, Miguel
dc.date.accessioned2016-04-19T15:31:31Z
dc.date.available2016-04-19T15:31:31Z
dc.date.issued2015
dc.description.abstractThe world annual production of rice is higher than 700.7 million tons, which generates rice husk and straw wastes. Rice culture also produces big amounts of polyethylene (PE) bags used in rice packs and for seeds and fertilizer storage that usually end up in landfills, due to their degree of contamination. The energetic valorisation of these wastes may be accomplished by different processes, co-gasification is one of the most viable, as it leads to the production of a synthetic gaseous mixture (bio-syngas) that can be used for energy production to be used during rice milling processes. Gasification of rice husks has some challenges, due to these wastes high content of silica and alkali metals that lead to the formation of solids with lower melting point, thus, leading to bed agglomeration that causes reactor erosion and serious damage. PE has lower ash content and much higher energetic content than rice husks. However, PE polymeric structure may lead to the formation of higher tar contents, which compromise most gasification gas utilisations. Co-gasification of PE and rice husks allows taking advantages of each waste favourable characteristic, diluting the unsuitable features. Co-gasification of these wastes was done in presence of steam blended with air or oxygen. Steam promoted the gasification reactions and favoured H2 production. Air or oxygen promoted the partial oxidation of the feedstocks to be co-gasified and supplied the energy necessary for the endothermic gasification reactions. The use of air has a low cost, but has the great disadvantage of diluting the bio-syngas produced, thus lowering its energetic content. On the other hand, the use of oxygen solves the problems related to gas dilution with nitrogen, but increases the operating cost. Bio-syngas composition obtained by co-gasification trials done with air enriched with different oxygen contents was compared with those obtained with air or pure oxygen to determine the best approach considering both the technical and economical sustainability.pt_PT
dc.identifier.citationPinto, F.; André, Rui N.; Lopes, M. Helena [et.al.]. - Comparison of co-gasification of wastes mixtures obtained from rice production wastes using air or oxygen. In: Chemical Engineering Transactions, 2015, Vol. 43, p. 2227-2232pt_PT
dc.identifier.doi10.3303/CET1543372pt_PT
dc.identifier.issn2283-9216
dc.identifier.urihttp://hdl.handle.net/10400.9/2943
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAIDIC - The Italian Association of Chemical Engineeringpt_PT
dc.relation.publisherversionhttp://dx.doi.org/10.3303/CET1543372pt_PT
dc.subjectWaste valorizationpt_PT
dc.subjectCo-gasificationpt_PT
dc.subjectRice wastespt_PT
dc.subjectRice Strawpt_PT
dc.titleComparison of co-gasification of wastes mixtures obtained from rice production wastes using air or oxygenpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FAAG-REC%2F3477%2F2012/PT
oaire.citation.endPage2232pt_PT
oaire.citation.startPage2227pt_PT
oaire.citation.titleChemical Engineering Transactionspt_PT
oaire.citation.volume43pt_PT
oaire.fundingStream5876-PPCDTI
person.familyNamePinto
person.familyNameAndre
person.familyNameLopes
person.familyNameMiranda
person.givenNameFilomena
person.givenNameRui Neto
person.givenNameHelena
person.givenNameMiguel
person.identifier2653052
person.identifier.ciencia-id4C1B-3AF1-8A48
person.identifier.orcid0000-0002-1014-568X
person.identifier.orcid0000-0002-5012-6467
person.identifier.orcid0000-0001-9378-5254
person.identifier.orcid0000-0001-9318-1506
person.identifier.ridL-4824-2017
person.identifier.ridD-9167-2013
person.identifier.scopus-author-id7102740188
person.identifier.scopus-author-id7102736282
person.identifier.scopus-author-id18437851600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublicationab9b3ab7-7989-40cc-adb4-b2ace14451ca
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