IR and TPD studies of the reaction of acetic acid in zeolites NaHY

2006
journal article
article
cris.lastimport.wos2024-04-09T23:50:27Z
dc.abstract.enIR and TPD experiments have shown that the reaction of acetic acid in zeolite NaHY (at 370-470K) consumes Si-OH-Al groups and produces acetate ions and water. This suggests that zeolitic Si-OH-Al which are strong acid sites (proton donors) may also act as proton acceptors from organic acids. Whereas acetic acid was sorbed in zeolite NaY, which did not contain OH, groups acetate ions were practically not formed. The sorption of acetic acid in zeolite NaHY dehydroxylated by calcination at high temperature (1100K) formed acetate ions more easily (at room temperature) than in non-dehydroxylated zeolite. It suggests that the sites produced by dehydroxylation were more active in the reaction with acetic acid than Si-OH-Al groups. The possibility, that extraframework Al species, which play the role of Lewis acid sites, are so much reactive with acetic acid cannot be excluded. The extraframework Al species created in zeolite HY by steaming, as well as those present in HMCM-41 were also found to be more reactive against acetic acid than zeolitic Si-OH-Al. We also studied the adsorption of acetic acid on the surface of magnesia, alumina, and silica. In the case of magnesia and alumina the acetate ions were very easily formed at room temperature, indicating that Mg-OH, Al-OH or surface oxygens were better acceptors of protons from acetic acid than Si-OH-Al groups. Acetate ions in zeolite were found to be quite stable. They decomposed above 570K, producing mostly $CO_{2}$, CO and ethane.pl
dc.affiliationWydział Chemii : Zakład Chemii Nieorganicznejpl
dc.contributor.authorKukulska-Zając, Ewapl
dc.contributor.authorGóra-Marek, Kinga - 128133 pl
dc.contributor.authorDatka, Jerzy - 127692 pl
dc.date.accessioned2015-09-24T08:29:34Z
dc.date.available2015-09-24T08:29:34Z
dc.date.issued2006pl
dc.description.number1-3pl
dc.description.physical216-221pl
dc.description.volume96pl
dc.identifier.doi10.1016/j.micromeso.2006.06.037pl
dc.identifier.eissn1873-3093pl
dc.identifier.issn1387-1811pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/15780
dc.languageengpl
dc.language.containerengpl
dc.rightsDodaję tylko opis bibliograficzny*
dc.rights.licencebez licencji
dc.rights.uri*
dc.subject.enIR spectroscopypl
dc.subject.enOH groupspl
dc.subject.enbasicitypl
dc.subject.enzeolite NaHYpl
dc.subject.enacetic acidpl
dc.subject.enacetate ionspl
dc.subtypeArticlepl
dc.titleIR and TPD studies of the reaction of acetic acid in zeolites NaHYpl
dc.title.journalMicroporous and Mesoporous Materialspl
dc.typeJournalArticlepl
dspace.entity.typePublication
cris.lastimport.wos
2024-04-09T23:50:27Z
dc.abstract.enpl
IR and TPD experiments have shown that the reaction of acetic acid in zeolite NaHY (at 370-470K) consumes Si-OH-Al groups and produces acetate ions and water. This suggests that zeolitic Si-OH-Al which are strong acid sites (proton donors) may also act as proton acceptors from organic acids. Whereas acetic acid was sorbed in zeolite NaY, which did not contain OH, groups acetate ions were practically not formed. The sorption of acetic acid in zeolite NaHY dehydroxylated by calcination at high temperature (1100K) formed acetate ions more easily (at room temperature) than in non-dehydroxylated zeolite. It suggests that the sites produced by dehydroxylation were more active in the reaction with acetic acid than Si-OH-Al groups. The possibility, that extraframework Al species, which play the role of Lewis acid sites, are so much reactive with acetic acid cannot be excluded. The extraframework Al species created in zeolite HY by steaming, as well as those present in HMCM-41 were also found to be more reactive against acetic acid than zeolitic Si-OH-Al. We also studied the adsorption of acetic acid on the surface of magnesia, alumina, and silica. In the case of magnesia and alumina the acetate ions were very easily formed at room temperature, indicating that Mg-OH, Al-OH or surface oxygens were better acceptors of protons from acetic acid than Si-OH-Al groups. Acetate ions in zeolite were found to be quite stable. They decomposed above 570K, producing mostly $CO_{2}$, CO and ethane.
dc.affiliationpl
Wydział Chemii : Zakład Chemii Nieorganicznej
dc.contributor.authorpl
Kukulska-Zając, Ewa
dc.contributor.authorpl
Góra-Marek, Kinga - 128133
dc.contributor.authorpl
Datka, Jerzy - 127692
dc.date.accessioned
2015-09-24T08:29:34Z
dc.date.available
2015-09-24T08:29:34Z
dc.date.issuedpl
2006
dc.description.numberpl
1-3
dc.description.physicalpl
216-221
dc.description.volumepl
96
dc.identifier.doipl
10.1016/j.micromeso.2006.06.037
dc.identifier.eissnpl
1873-3093
dc.identifier.issnpl
1387-1811
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/15780
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Dodaję tylko opis bibliograficzny
dc.rights.licence
bez licencji
dc.rights.uri*
dc.subject.enpl
IR spectroscopy
dc.subject.enpl
OH groups
dc.subject.enpl
basicity
dc.subject.enpl
zeolite NaHY
dc.subject.enpl
acetic acid
dc.subject.enpl
acetate ions
dc.subtypepl
Article
dc.titlepl
IR and TPD studies of the reaction of acetic acid in zeolites NaHY
dc.title.journalpl
Microporous and Mesoporous Materials
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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