Dehydration of Pentanediol over CeO2, CeO2-Ga2O3, and CeO2-In2O3

Muthu Kumaran Gnanamani, Gary Jacobs, Wilson D. Shafer, Shelley D. Hopps, Burtron H. Davis

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Conversion of bio-oil from flash pyrolysis of biomass is a way to produce useful renewable feedstocks for the chemicals industry. Dehydration of pentanediol (1,5- and 2,4-pentanediol) was investigated over CeO2, CeO2-Ga2O3, and CeO2-In2O3 catalysts at 250–350 °C. Adding Ga or In (20 mol%) improved the conversion of pentanediol over CeO2, but adversely affected selectivity. In the base case, 1,5-pentanediol was converted on CeO2 to 4-penten-1-ol and 1-pentanol, desired linear alcohols, together with unwanted cyclopentanol and cyclopentanone byproducts. Adding gallium or indium to ceria increased the selectivity towards undesired cyclized products like tetrahydropyran and tetrahydropyran-2-one due to increased acidity. In the base case, 2,4-pentanediol converted on CeO2 to unsaturated alcohol (e. g., 3-penten-2-ol > 74 % selectivity), but adding Ga or In promoted acid-catalyzed cracking. Tuning the acid-base characteristics of ceria significantly alters the product distribution.

Original languageEnglish
Pages (from-to)4150-4156
Number of pages7
JournalChemistrySelect
Volume2
Issue number14
DOIs
StatePublished - May 15 2017

Bibliographical note

Funding Information:
The work carried out at the CAER was supported by funding from the Commonwealth of Kentucky.

Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • 1,5-pentanediol
  • CeO
  • cyclization
  • dehydration
  • gallium

ASJC Scopus subject areas

  • Chemistry (all)

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