Ethanol conversion over cesium-doped mono- and bi-cationic aluminum and gallium salts

2015
journal article
article
10
dc.abstract.enThe objective of this study was synthesis, characterization, and catalytic testing of mono-cationic (GaPW12O40, AlPW12O40) and bi-cationic (CsGa0.5H0.5PW12O40, CsAl0.5H0.5PW12O40) salts of tungstophosphoric acid. These heteropoly salts are characterized by Brönsted acidity derived from protons generated by dissociation of water molecules coordinated to the metal atoms. Catalytic activity of the studied salts was evaluated based on ethanol conversion and compared with the well-known parent heteropolyacid H3PW12O40. The reaction products, ethylene and diethyl ether, were monitored simultaneously by FTIR spectroscopy and chromatographic analysis. The infra-red studies indicated that ethylene is formed not only from ethanol but also by diethyl ether decomposition. Cs-doped bi-cationic catalysts exhibited higher activity for ethylene and ether formation than the mono-cationic salts. The following order of catalytic activity was established: H3PW12O40 > CsGa0.5H0.5PW12O40 ∼ CsAl0.5H0.5PW12O40 > GaPW12O40 > AlPW12O40. It is in agreement with the order of their acid strength determined by microcalorimetry and specific surface areas of the studied catalysts.pl
dc.affiliationWydział Chemii : Zakład Chemii Nieorganicznejpl
dc.contributor.authorFilek, Urszulapl
dc.contributor.authorKirpsza, Adampl
dc.contributor.authorLalik, Erwinpl
dc.contributor.authorBielański, Adam - 363366 pl
dc.contributor.authorMicek-Ilnicka, Annapl
dc.date.accessioned2015-12-02T12:13:37Z
dc.date.available2015-12-02T12:13:37Z
dc.date.issued2015pl
dc.description.additionalProf A. Bielański afiliuje z Wydziału Chemii UJpl
dc.description.admin[AB] Bielański, Adam [SAP14020391] 50000141pl
dc.description.physical152-162pl
dc.description.volume407pl
dc.identifier.doi10.1016/j.molcata.2015.06.021pl
dc.identifier.eissn1873-314Xpl
dc.identifier.issn1381-1169pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/17429
dc.languageengpl
dc.language.containerengpl
dc.rights.licencebez licencji
dc.subject.enheteropolyacidpl
dc.subject.enethylenepl
dc.subject.enethanol dehydrationpl
dc.subject.encesiumpl
dc.subject.entungstophosphoric acidpl
dc.subtypeArticlepl
dc.titleEthanol conversion over cesium-doped mono- and bi-cationic aluminum and gallium $H_3PW_{12}O_{40}$ saltspl
dc.title.journalJournal of Molecular Catalysis. A, Chemicalpl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
The objective of this study was synthesis, characterization, and catalytic testing of mono-cationic (GaPW12O40, AlPW12O40) and bi-cationic (CsGa0.5H0.5PW12O40, CsAl0.5H0.5PW12O40) salts of tungstophosphoric acid. These heteropoly salts are characterized by Brönsted acidity derived from protons generated by dissociation of water molecules coordinated to the metal atoms. Catalytic activity of the studied salts was evaluated based on ethanol conversion and compared with the well-known parent heteropolyacid H3PW12O40. The reaction products, ethylene and diethyl ether, were monitored simultaneously by FTIR spectroscopy and chromatographic analysis. The infra-red studies indicated that ethylene is formed not only from ethanol but also by diethyl ether decomposition. Cs-doped bi-cationic catalysts exhibited higher activity for ethylene and ether formation than the mono-cationic salts. The following order of catalytic activity was established: H3PW12O40 > CsGa0.5H0.5PW12O40 ∼ CsAl0.5H0.5PW12O40 > GaPW12O40 > AlPW12O40. It is in agreement with the order of their acid strength determined by microcalorimetry and specific surface areas of the studied catalysts.
dc.affiliationpl
Wydział Chemii : Zakład Chemii Nieorganicznej
dc.contributor.authorpl
Filek, Urszula
dc.contributor.authorpl
Kirpsza, Adam
dc.contributor.authorpl
Lalik, Erwin
dc.contributor.authorpl
Bielański, Adam - 363366
dc.contributor.authorpl
Micek-Ilnicka, Anna
dc.date.accessioned
2015-12-02T12:13:37Z
dc.date.available
2015-12-02T12:13:37Z
dc.date.issuedpl
2015
dc.description.additionalpl
Prof A. Bielański afiliuje z Wydziału Chemii UJ
dc.description.adminpl
[AB] Bielański, Adam [SAP14020391] 50000141
dc.description.physicalpl
152-162
dc.description.volumepl
407
dc.identifier.doipl
10.1016/j.molcata.2015.06.021
dc.identifier.eissnpl
1873-314X
dc.identifier.issnpl
1381-1169
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/17429
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights.licence
bez licencji
dc.subject.enpl
heteropolyacid
dc.subject.enpl
ethylene
dc.subject.enpl
ethanol dehydration
dc.subject.enpl
cesium
dc.subject.enpl
tungstophosphoric acid
dc.subtypepl
Article
dc.titlepl
Ethanol conversion over cesium-doped mono- and bi-cationic aluminum and gallium $H_3PW_{12}O_{40}$ salts
dc.title.journalpl
Journal of Molecular Catalysis. A, Chemical
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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