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Kinetic parameters estimation for ascorbic acid degradation in fruit nectar using the partial equivalent isothermal exposures (PEIE) method under non-isothermal continuous heating conditions

2001Journal article Open access
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dc.contributor.authorVieira, Margarida C.
dc.contributor.authorTeixeira, Arthur A.
dc.contributor.authorSilva, Cristina L. M.
dc.date.accessioned2011-10-23T08:54:54Z
dc.date.available2011-10-23T08:54:54Z
dc.date.issued2001
dc.description.abstractWith the purpose of testing the Paired Equivalent Isothermal Exposures (PEIE) method to determine reaction kinetic parameters under non-isothermal conditions, continuous pasteurizations were carried out with a tropical fruit nectar [25% cupuacüu (Theobroma grandiflorum) pulp and 15% sugar] to estimate the ascorbic acid thermal degradation kinetic parameters. Fifteen continuous thermal exposures were studied, with seven being cycled. The experimental ascorbic acid thermal degradation kinetic parameters were estimated by the PEIE method (Ea ) 73 ( 9 kJ/mol, k80°C ) 0.017 ( 0.001 min-1). These values compared very well to the previously determined values for the same product under isothermal conditions (Ea ) 73 ( 7 kJ/mol, k80°C ) 0.020 ( 0.001 min-1). The predicted extents of reaction presented a good fit to the experimental data, although the cycled thermal treatments presented some deviation. In addition to being easier and faster than the Isothermal method, the PEIE method can be a more reliable method to estimate first-order reaction kinetic parameters when continuous heating is considered.por
dc.identifier.citationVIEIRA, Margarida C. ; TEIXEIRA, Arthur A. ; SILVA, Cristina L. M. - Kinetic Parameters Estimation for Ascorbic Acid Degradation in Fruit Nectar Using the Partial Equivalent Isothermal Exposures (PEIE) Method under Non-Isothermal Continuous Heating Conditions. Biotechnology Progress. ISSN 8756-7938. Vol. 17, n.º 1 (2001), p. 175-181por
dc.identifier.urihttp://hdl.handle.net/10400.14/6913
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherAmerican Chemical Society and American Institute of Chemical Engineerspor
dc.relation.publisherversionThe definitive version is available at www3.interscience.wiley.compor
dc.titleKinetic parameters estimation for ascorbic acid degradation in fruit nectar using the partial equivalent isothermal exposures (PEIE) method under non-isothermal continuous heating conditionspor
dc.typejournal article
dspace.entity.typePublication
person.familyNameVieira
person.familyNameSilva
person.givenNameMargarida
person.givenNameCristina
person.identifier1473674
person.identifier.ciencia-id3314-4EFC-1E4A
person.identifier.ciencia-id6611-634A-132C
person.identifier.orcid0000-0003-2774-706X
person.identifier.orcid0000-0002-0495-3955
person.identifier.ridE-1805-2012
person.identifier.ridA-3568-2013
person.identifier.scopus-author-id7202140775
person.identifier.scopus-author-id7201387397
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication309a0970-cf9e-45aa-90a8-aa2f2ba96fc0
relation.isAuthorOfPublication4e2903de-0679-4cb1-981e-10de14c0c995
relation.isAuthorOfPublication.latestForDiscovery4e2903de-0679-4cb1-981e-10de14c0c995

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