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The pH effect on the kinetics of 4-nitrophenol removal by CWPO with doped carbon black catalysts

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dc.contributor.authorDíaz de Tuesta, Jose Luis
dc.contributor.authorQuintanilla, Asunción
dc.contributor.authorCasas, Jose A.
dc.contributor.authorMorales-Torres, Sergio
dc.contributor.authorFaria, Joaquim
dc.contributor.authorSilva, Adrián
dc.contributor.authorGomes, Helder
dc.date.accessioned2020-12-03T09:40:49Z
dc.date.available2020-12-03T09:40:49Z
dc.date.issued2020
dc.description.abstractP, B and N-doped carbon blacks prepared with H3PO4, urea and H3BO3 were tested as catalysts in the wet peroxide oxidation of a concentrated 4-nitrophenol (4-NP) model solution (C4-NP=5 g·L−1). The highest catalytic activity was found for P-doped carbon black (complete removal of 4-NP after 4 h at 80 °C, Ccat=2.5 g·L−1, CH2O2 17.8 g·L = 1 and initial pH 3, whereas 44-19% removals were reached with the other catalysts). That was ascribed to the strongest acidity (pHPZC=3.5) and hydrophilic character of the catalyst. Initial pH affected the oxidation, allowing to increase strongly the conversion of 4-NP with the P-doped catalyst decreasing the initial pH from 4 to 2 (4-NP removal from 20% to 99% after 8 h of reaction time at 50 °C, Ccat=2.5 g·L−1 andCH2O2 17.8 g·L = 1). An autocatalytic-power-law kinetic model was developed to predict the observed induction period and the dependence on the pH of the 4-NP oxidation, H2O2 consumption and pH evolution (k4- NP=2.2·10−5M−2min−1, kH2O2 4.0·10 M ·min = 6 3 1 and k 5.1·10 M min H + = 3 0.23 1 at 80 °C).pt_PT
dc.description.sponsorshipThis work is a result of: Project “AIProcMat@N2020 - Advanced Industrial Processes and Materials for a Sustainable Northern Region of Portugal 2020”, with the reference NORTE-01-0145-FEDER-000006, supported by North Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF); Associate Laboratory LSRE-LCM - UID/EQU/50020/2019 - funded by national funds throughmFCT/MCTES (PIDDAC); and CIMO - UID/AGR/00690/2019 through FEDER under Program PT2020. S. Morales Torres acknowledges the financial support from University of Granada (Reincorporación Plan Propio).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDíaz de Tuesta, Jose Luis; Quintanilla, Asuncion; Casas, Jose A.; Morales-Torres, Sergio; Faria, Joaquim L.; Silva, Adrián; Gomes, Helder (2020). The pH effect on the kinetics of 4-nitrophenol removal by CWPO with doped carbon black catalysts. Catalysis Today . ISSN 0920-5861. 356, p. 216-225pt_PT
dc.identifier.doi10.1016/j.cattod.2019.08.033pt_PT
dc.identifier.issn0920-5861
dc.identifier.urihttp://hdl.handle.net/10198/22914
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectCatalytic wet peroxide oxidationpt_PT
dc.subjectDoped carbon blackpt_PT
dc.subjectKinetic modelpt_PT
dc.subjectpH effectpt_PT
dc.subjectInduction periodpt_PT
dc.subjectNitrophenolpt_PT
dc.titleThe pH effect on the kinetics of 4-nitrophenol removal by CWPO with doped carbon black catalystspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage225pt_PT
oaire.citation.startPage216pt_PT
oaire.citation.titleCatalysis Todaypt_PT
oaire.citation.volume356pt_PT
person.familyNameDíaz de Tuesta
person.familyNameGomes
person.givenNameJose Luis
person.givenNameHelder
person.identifier.ciencia-id7A1F-022B-7DBF
person.identifier.ciencia-id6218-1E19-13EE
person.identifier.orcid0000-0003-2408-087X
person.identifier.orcid0000-0001-6898-2408
person.identifier.ridD-9785-2017
person.identifier.scopus-author-id55755821600
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication2ad0465f-5f8a-4b14-90f5-bf85996f9ce1
relation.isAuthorOfPublication0eb96337-224a-4339-9918-334436fbbb99
relation.isAuthorOfPublication.latestForDiscovery2ad0465f-5f8a-4b14-90f5-bf85996f9ce1

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