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Separation of C5/C6 isomerate fractions in a mixed/layered bed of BETA/5A zeolites

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dc.contributor.authorBrântuas, Pedro
dc.contributor.authorKarimi, Mohsen
dc.contributor.authorSilva, José A.C.
dc.contributor.authorRodrigues, Alírio
dc.date.accessioned2019-10-14T10:11:28Z
dc.date.available2019-10-14T10:11:28Z
dc.date.issued2018
dc.description.abstractThe combustion quality of gasoline is measured by the research octane number (RON). When RON is high, the combustion occurs like a smooth explosion instead of a detonation and the performances of the motor are improved. Cracking, alkylation, isomerization and other process can be used to increase the RON of gasoline to about 90. The light straight-run (LSR) naphtha fraction produced by fractional distillation is one of the feedstocks used to produce gasoline. Its major constituents include C5 and C6 normal paraffins which have relatively low RON compared to their branched isomers. Therefore, octane upgrading commonly uses isomerization to rearrange the structure of the linear paraffins into branched components. The product stream from an isomerization reactor consists of hexane isomers: 2,2-dimethylbutane (22DMB), 2,3-dimethylbutane (23DMB), 2-methylpetane (2MP), 3-methylpentane (3MP), n-hexane (nHEX), as well as pentane isomers: iso-pentane (iPEN) and n-pentane (nPEN). Zeolite 5A is used to separate the linear isomers (nHEX and nPEN) from the branched isomers, returning them to the isomerization reactor for further processing, while the other isomers are retained as product. Denayer et al. [1] found that pentane and hexane isomers might be separated by chromatography according to their degree of branching using columns of zeolite beta, and some years before Huddersman and Klimczyk [2,3] indicated that zeolite beta in cation form (H, Ba) is an effective adsorbent for the separation of branched hexane isomers. Therefore, using both zeolites together should allow for a better separation of the high RON isomers (22DMB, 23DMB and iPEN) from the remaining isomers, specially the low RON isomers (nPEN and nHEX). Thus, four different adsorber bed configurations were studied: zeolite beta; a layered bed of zeolite 5A followed by zeolite beta; a layered bed first with zeolite beta followed by zeolite 5A; and, a mixed bed of both zeolites with the objective of analyzing the effect of each configuration on the adsorption and separation of alkane isomers.pt_PT
dc.description.sponsorshipThis work was financially supported by: Project POCI-01-0145-FEDER-006984 – Associate Laboratory LSRE-LCM funded by FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionalização (POCI) – and by national funds through FCT - Fundação para a Ciência e a Tecnologia with the Project POCI-01-0145-FEDER-016517 funded by FEDER through COMPETE2020 - (POCI).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBrântuas, Pedro; Karimi, Mohsen; Silva, José A.C.; Rodrigues, Alírio (2018). Separation of C5/C6 isomerate fractions in a mixed/layered bed of BETA/5A zeolites. In 41ª Reunión Ibérica de Adsorción and 3er Simposio Iberoamericano de Adsorción: abstracts book. Gijónpt_PT
dc.identifier.urihttp://hdl.handle.net/10198/19653
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherConsejo Superior de Investigaciones Científicaspt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectHexane isomerspt_PT
dc.subjectBreakthrough curvespt_PT
dc.subjectAdsorption equilibriumpt_PT
dc.subjectMulticomponent mixturespt_PT
dc.subjectZeolite betapt_PT
dc.subjectZeolite 5Apt_PT
dc.titleSeparation of C5/C6 isomerate fractions in a mixed/layered bed of BETA/5A zeolitespt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceGijónpt_PT
oaire.citation.endPage335pt_PT
oaire.citation.startPage331pt_PT
oaire.citation.titleSeparation of C5/C6 isomerate fractions in a mixed/layered bed of BETA/5A Zeolitespt_PT
person.familyNameBrântuas
person.familyNameSilva
person.givenNamePedro
person.givenNameJosé A.C.
person.identifier.ciencia-id7019-9B98-EB05
person.identifier.ciencia-idC11B-F5CF-7C78
person.identifier.orcid0000-0002-6488-2001
person.identifier.orcid0000-0003-1778-3833
person.identifier.scopus-author-id7403023684
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication8db5a58b-6e02-4409-9382-218db7fdd233
relation.isAuthorOfPublication16366ede-a7d6-45ff-a8c9-eff9bdde35c7
relation.isAuthorOfPublication.latestForDiscovery8db5a58b-6e02-4409-9382-218db7fdd233

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