Acrolein hydrogenation on PdPt powder catalysts prepared by colloid synthesis

N. Gyorffy, Z. Paál

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Acrolein was hydrogenated over unsupported Pd, Pt and PdPt bimetallic catalysts with different Pd:Pt atomic ratios. The formation of saturated aldehyde (propanal) by C{double bond, long}C bond hydrogenation was the main reaction on each catalyst. Maximum conversion values were reached at 293 K over each palladium containing catalyst and at 473 K on Pt. Palladium and platinum behaved differently in secondary reactions. Dipropyl ether was formed in the presence of Pd, while under the same conditions - low temperature (323 K) and high hydrogen pressure (400 Torr) - propane and propanol were produced on the Pt catalyst. The selectivity patterns of bimetallic catalysts were different from those of monometallic ones: under the same conditions dipropyl ether showed a higher selectivity on the PdPt pairs. As the surface Pt concentration increased, the Pt-like character was more and more prevailing; namely the selectivity of propane and propanol increased. At high temperature (473 K) acrolein underwent hydrogenolysis over each catalyst. The selectivity of ethane was higher when Pd was present.

Original languageEnglish
Pages (from-to)24-28
Number of pages5
JournalJournal of Molecular Catalysis A: Chemical
Volume295
Issue number1-2
DOIs
Publication statusPublished - Nov 12 2008

Fingerprint

Acrolein
Colloids
Powders
Hydrogenation
hydrogenation
colloids
catalysts
Catalysts
synthesis
selectivity
1-Propanol
Propane
Catalyst selectivity
Palladium
Propanol
propane
Ether
palladium
Ethers
ethers

Keywords

  • Acrolein
  • Bimetallic
  • Hydrogenation
  • Pd
  • Powder catalyst
  • Pt

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry
  • Process Chemistry and Technology

Cite this

Acrolein hydrogenation on PdPt powder catalysts prepared by colloid synthesis. / Gyorffy, N.; Paál, Z.

In: Journal of Molecular Catalysis A: Chemical, Vol. 295, No. 1-2, 12.11.2008, p. 24-28.

Research output: Contribution to journalArticle

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AB - Acrolein was hydrogenated over unsupported Pd, Pt and PdPt bimetallic catalysts with different Pd:Pt atomic ratios. The formation of saturated aldehyde (propanal) by C{double bond, long}C bond hydrogenation was the main reaction on each catalyst. Maximum conversion values were reached at 293 K over each palladium containing catalyst and at 473 K on Pt. Palladium and platinum behaved differently in secondary reactions. Dipropyl ether was formed in the presence of Pd, while under the same conditions - low temperature (323 K) and high hydrogen pressure (400 Torr) - propane and propanol were produced on the Pt catalyst. The selectivity patterns of bimetallic catalysts were different from those of monometallic ones: under the same conditions dipropyl ether showed a higher selectivity on the PdPt pairs. As the surface Pt concentration increased, the Pt-like character was more and more prevailing; namely the selectivity of propane and propanol increased. At high temperature (473 K) acrolein underwent hydrogenolysis over each catalyst. The selectivity of ethane was higher when Pd was present.

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