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Furfural Upgrading by Aldol Condensation with Ketones over Solid-Base Catalysts

Journal Article · · Catalysis Letters
 [1];  [2];  [2];  [2];  [3]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States); Univ. of Delaware, Newark, DE (United States); University of Pennsylvania
  2. Univ. of Pennsylvania, Philadelphia, PA (United States)
  3. Univ. of Pennsylvania, Philadelphia, PA (United States); Univ. of Delaware, Newark, DE (United States)
Aldol condensation reactions between furfural and various ketones were studied in a flow reactor at 373 K and 100 psi for application to upgrading of furfural. Specific rates for the reaction of acetone and furfural were measured on MgAl2O4, Al2O3, CaO/MgAl2O4 and MgO/MgAl2O4 and found to be highest on CaO/MgAl2O4. While the presence of CO2 and H2O did not affect the stability of the CaO/MgAl2O4 catalyst, the catalyst deactivated over a period of a few hours due to the production of 2-furoic acid formed by the Cannizzaro reaction. While aldol condensation rates between furfural and either 2-pentanone and decanal approached that of acetone, rates for 4-heptanone and 2,5-heptanedione were significantly lower because the α-hydrogens of the carbonyl compounds are less easily attacked in these molecules. The selectivity to aldol products is affected by the relative rates of the aldol-condensation and the Cannizzaro reactions. Possible strategies for maximizing production of the aldol products with larger ketones are discussed.
Research Organization:
Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Engineering & Technology
Grant/Contract Number:
SC0001004
OSTI ID:
1844953
Journal Information:
Catalysis Letters, Journal Name: Catalysis Letters Journal Issue: 12 Vol. 152; ISSN 1011-372X
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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