Acidity of silica-alumina catalysts by amine titration using Hammett indicators and FT-IR study of pyridine adsorption

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dc.contributor.authorYurdakoç, Mehmet Kadir
dc.contributor.authorAkçay, Mehmet
dc.contributor.authorYurdakoç, Mürüvvet
dc.contributor.authorTonbul, Yalçın
dc.date.accessioned2024-04-24T18:56:48Z
dc.date.available2024-04-24T18:56:48Z
dc.date.issued1999
dc.departmentDicle Üniversitesien_US
dc.description.abstractIn this study, characterization and surface acidity of Siral ($SiO_2-Al_2O_3$) compounds were investigated with Hammett acidity functions, the n-butylamine titration method and FTIR analysis of the spectra of pyridine adsorption. All the samples had an acid strength of $H_oleqle$+2.8. The calculated total amount of acid of the samples increased with the increase in $SiO_2$ content up to Siral 40 and then decreased sharply in the case of Siral 80. Maximum amount of acidity was observed in the case of Siral 40 as 1.37mmole/g. No evidence was found for a band at 1540 $cm^{-1}$ on Pural indicating that there were no Bronsted sites on the surface strong enough to react with pyridine. As a result, we can say that the Lewis sites predominate in all the silica-aluminas.en_US
dc.identifier.endpage327en_US
dc.identifier.issn1300-0527
dc.identifier.issn1303-6130
dc.identifier.issue3en_US
dc.identifier.startpage319en_US
dc.identifier.trdizinid34927
dc.identifier.urihttps://search.trdizin.gov.tr/yayin/detay/34927
dc.identifier.urihttps://hdl.handle.net/11468/25496
dc.identifier.volume23en_US
dc.indekslendigikaynakTR-Dizin
dc.language.isoenen_US
dc.relation.ispartofTurkish Journal of Chemistry
dc.relation.publicationcategoryDiğeren_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.titleAcidity of silica-alumina catalysts by amine titration using Hammett indicators and FT-IR study of pyridine adsorptionen_US
dc.titleAcidity of silica-alumina catalysts by amine titration using Hammett indicators and FT-IR study of pyridine adsorption
dc.typeOtheren_US

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