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Catalyzed pyrolysis of coffee and tea wastes

2021-11-15Journal article Restricted access
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dc.contributor.authorRijo, Bruna
dc.contributor.authorSoares Dias, A. P.
dc.contributor.authorRamos, Marta
dc.contributor.authorJesus, Nicole de
dc.contributor.authorPuna, Jaime
dc.date.accessioned2021-10-14T10:10:50Z
dc.date.available2021-10-14T10:10:50Z
dc.date.issued2021-11-15
dc.description.abstractThe pyrolysis of food waste has a double environmental advantage as it contributes to the management and treatment of waste and allows the production of renewable fuels. Spent coffee and tea grounds, were characterized by thermogravimetry to determine their composition and evaluating the pyrolysis kinetics of each lignocellulosic pseudocomponent and pyrolyzed in a fixed bed reactor. Tea grounds had about twice the cellulose and higher pyrolysis activation energy than the coffee grounds sample. At 673 K the pyrolysis of the coffee grounds led to a 42% bio-oil yield while the tea grounds produced only 18% of liquid product, which is compatible with its higher cellulose content and the higher activation energy for pyrolysis. The alkaline carbonates used as pyrolysis catalysts led to an increase in the production of a gaseous product, bio-gas, with a reduction in the production of bio-oil but accompanied by a significant increase in the volatile fraction of the produced bio-oils. Pyrolysis data shows that both coffee and tea residues can be used as raw materials to produce pyrolysis bio-oil and that low-value materials such as alkaline carbonates can be used as pyrolysis catalysts improving the characteristics of bio-oils produced such as acidity and volatility.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationRIJO, Bruna; [et al] – Catalyzed pyrolysis of coffee and tea wastes. Energy. ISSN 0360-5442. Vol. 235 (2021), pp. 1-12pt_PT
dc.identifier.doi10.1016/j.energy.2021.121252pt_PT
dc.identifier.eissn1873-6785
dc.identifier.issn0360-5442
dc.identifier.urihttp://hdl.handle.net/10400.21/13889
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationAssociate Laboratory of Energy, Transports and Aeronautics
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0360544221015000pt_PT
dc.subjectRenewable energypt_PT
dc.subjectWaste managementpt_PT
dc.subjectCoffee groundspt_PT
dc.subjectTea groundspt_PT
dc.subjectPyrolysispt_PT
dc.subjectCatalystspt_PT
dc.titleCatalyzed pyrolysis of coffee and tea wastespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAssociate Laboratory of Energy, Transports and Aeronautics
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50022%2F2020/PT
oaire.citation.endPage12pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleEnergypt_PT
oaire.citation.volume235pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameRijo
person.familyNameVieira Soares Pereira Dias
person.familyNameRamos
person.familyNamePuna
person.givenNameBruna
person.givenNameAna Paula
person.givenNameMarta
person.givenNameJaime
person.identifier790253
person.identifier.ciencia-idF212-6F13-4A64
person.identifier.ciencia-id7711-D804-97B8
person.identifier.ciencia-idF813-1438-B3B9
person.identifier.ciencia-idEE14-5CB2-AF04
person.identifier.orcid0000-0001-6720-6132
person.identifier.orcid0000-0002-4585-470X
person.identifier.orcid0000-0003-4967-4850
person.identifier.orcid0000-0002-2763-3655
person.identifier.ridA-6442-2011
person.identifier.scopus-author-id24402152700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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