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Comparison of different heterogeneous catalysts for the estolides synthesis from oleic acid

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dc.citedby3
dc.contributor.authorNordin N.A.M.en_US
dc.contributor.authorAdnan N.F.en_US
dc.contributor.authorHamzah N.en_US
dc.contributor.authorIsahak W.N.R.W.en_US
dc.contributor.authorAyatillah A.en_US
dc.contributor.authorSalimon J.en_US
dc.contributor.authorYarmo M.A.en_US
dc.contributor.authorKamaruddin R.A.en_US
dc.contributor.authorid36782660400en_US
dc.contributor.authorid36781760300en_US
dc.contributor.authorid56036721300en_US
dc.contributor.authorid57208034136en_US
dc.contributor.authorid54402316300en_US
dc.contributor.authorid24767236500en_US
dc.contributor.authorid6602649833en_US
dc.contributor.authorid36796984100en_US
dc.date.accessioned2023-12-29T07:47:20Z
dc.date.available2023-12-29T07:47:20Z
dc.date.issued2012
dc.description.abstractDifferent catalysts, namely various loading of perchloric acid on various supports; HClO4/silica (SiO2), HClO4/silica gel (SG) and HClO4/alumina (Al2O3) were tested for the direct addition reaction of oleic acid (OA) to form estolide compounds. The reactions were carried out under vacuum (2 mBar) for 10 hours at 70 �C under solvent-less conditions. LC-MS ToF of reaction products results showed chromatographic peaks for the presence of two new estolide compounds, oleic-oleic monoestolide acid (m/z 563.51, as [M-H]-), and oleic-oleic diestolide acid (m/z 845.77 [M-H]-). The optimum loading of HClO4 for every support are 15 wt.% HClO4/SiO2 (SiO215), 10 wt.% HClO4/SG (SG10) and 35 wt.% HClO4/Al 2O3 (Al2O335). The SG10 turned out to be the best catalyst, achieving a final conversion of 97.5 % with 79.8 % selectivity to oleic-oleic monoestolide acid and 17.7 % selectivity to oleic-oleic diestolide acid. The activity and selectivity of the SG10 have been investigated and compared with homogeneous HClO4. The optimum catalysts for every support were characterized by XPS analysis, BET, TEM and TPD-NH3.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.4028/www.scientific.net/AMR.364.288
dc.identifier.epage292
dc.identifier.scopus2-s2.0-81855218157
dc.identifier.spage288
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-81855218157&doi=10.4028%2fwww.scientific.net%2fAMR.364.288&partnerID=40&md5=526fb163f2f78d358c40ade0deabeb78
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/30390
dc.identifier.volume364
dc.pagecount4
dc.sourceScopus
dc.sourcetitleAdvanced Materials Research
dc.subjectAlumina
dc.subjectEstolide synthesis
dc.subjectOleic acid
dc.subjectSilica
dc.subjectSilica gel
dc.subjectAddition reactions
dc.subjectAlumina
dc.subjectAluminum
dc.subjectCatalyst selectivity
dc.subjectGels
dc.subjectInorganic acids
dc.subjectNanostructured materials
dc.subjectOleic acid
dc.subjectSilica
dc.subjectSilica gel
dc.subjectSilicon compounds
dc.subjectSynthesis (chemical)
dc.subjectUnsaturated fatty acids
dc.subjectChromatographic peaks
dc.subjectEstolides
dc.subjectHeterogeneous catalyst
dc.subjectOptimum loading
dc.subjectPerchloric acids
dc.subjectXPS analysis
dc.subjectCatalyst supports
dc.titleComparison of different heterogeneous catalysts for the estolides synthesis from oleic aciden_US
dc.typeConference Paperen_US
dspace.entity.typePublication
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