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An SEM investigation of the pozzolanic activity of a waste catalyst oil refinery

2012-08Journal article Restricted access
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dc.contributor.authorCosta, Carla
dc.contributor.authorMarques, Paulo
dc.contributor.authorCarvalho, P. A.
dc.date.accessioned2015-08-28T14:06:22Z
dc.date.available2015-08-28T14:06:22Z
dc.date.issued2012-08
dc.description.abstractThe most active phase of the fluid catalytic cracking (FCC) catalyst, used in oil refinery, is zeolite-Y which is an aluminosilicate with a high internal and external surface area responsible for its high reactivity. Waste FCC catalyst is potentially able to be reused in cement-based materials - as an additive - undergoing a pozzolanic reaction with calcium hydroxide (Ca(OH)2) formed during cement hydration [1-3]. This reaction produces additional strength-providing reaction products i.e., calcium silicate hydrate (C-S-H) and hydrous calcium aluminates (C-A-H) which exact chemical formula and structure are still unknown. Partial replacement of cement by waste FCC catalyst has two key advantages: (1) lowering of cement production with the associated pollution reduction as this industry represents one of the largest sources of man-made CO2 emissions, and (2) improving the mechanical properties and durability of cement-based materials. Despite these advantages, there is a lack of fundamental knowledge on pozzolanic reaction mechanisms as well as spatial distribution of porosity and solid phases interactions at the microstructural level and consequently their relationship with macroscopical engineering properties of catalyst/cement blends. Within this scope, backscattered electron (BSE) images acquired in a scanning electron microscope (SEM) equipped with Energy-Dispersive Spectroscopy (EDS) and by X-ray diffraction were used to investigate chemical composition of hydration products and to analyse spatial information of the microstructure of waste FCC catalyst blended cement mortars. For this purpose mortars with different levels of cement substitution by waste catalyst as well as with different hydration ages, were prepared. The waste FCC catalyst used is produced by the Portuguese refinery company Petrogal S.A.por
dc.identifier.citationCOSTA, Carla; MARQUES, Paulo; CARVALHO, P. A. - An SEM investigation of the pozzolanic activity of a waste catalyst oil refinery. Microscopy and Microanalysis. ISSN: 1431-9276. Vol. 18, nr. 5 (2012), pp. 75-76por
dc.identifier.doi10.1017/S1431927612013037
dc.identifier.issn1431-9276
dc.identifier.issn1435-8115
dc.identifier.urihttp://hdl.handle.net/10400.21/5036
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherCambridge University Presspor
dc.relationECO-Zement: Reuse of fluid catalytic cracking waste from oil refineries in cement-based materials
dc.subjectCementpor
dc.titleAn SEM investigation of the pozzolanic activity of a waste catalyst oil refinerypor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleECO-Zement: Reuse of fluid catalytic cracking waste from oil refineries in cement-based materials
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FECM%2F113115%2F2009/PT
oaire.citation.endPage76por
oaire.citation.issue5por
oaire.citation.startPage75por
oaire.citation.titleMicroscopy and Microanalysispor
oaire.citation.volume18por
oaire.fundingStream3599-PPCDT
person.familyNameCosta
person.familyNameMarques
person.givenNameCarla
person.givenNamePaulo
person.identifier.ciencia-idF917-BA1E-09F1
person.identifier.orcid0000-0003-4222-4734
person.identifier.orcid0000-0002-7479-0119
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication6dd2b0ba-82ea-4928-be43-62f14e275ac3
relation.isAuthorOfPublication507aa2a6-7596-486e-8b39-e47f3b345704
relation.isAuthorOfPublication.latestForDiscovery6dd2b0ba-82ea-4928-be43-62f14e275ac3
relation.isProjectOfPublicationc0232b48-5e98-47b5-8580-772a0db2c566
relation.isProjectOfPublication.latestForDiscoveryc0232b48-5e98-47b5-8580-772a0db2c566

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