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Donor activity of sub- and supercritical primary alcohols in catalyst-free and Ni/γ-Al2O3 catalyzed transfer hydrogenation of furfural.
- Source :
-
Journal of Supercritical Fluids . Feb2023, Vol. 193, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Sub- and supercritical alcohols are known as effective hydrogen donors. In this work, transfer hydrogenation (TH) of furfural with C 1 -C 4 alcohols has been studied under sub- and supercritical conditions. In the range of 230–275 °C, the observed activation energy of catalyst-free transformations of furfural into furfuryl alcohol and some minor byproducts has been shown to be 98 ± 8, 64 ± 4 and 79 ± 6 kJ/mol for EtOH, 1-PrOH and 2-PrOH, respectively. The use of a Ni/γ-Al 2 O 3 catalyst results in higher rate constants compared to the catalyst-free TH. Nevertheless, the selectivity to furfuryl alcohol in the presence of the catalyst does not exceed 50% vs 70–80% for the catalyst-free transformations. Thus, this study shows the high donor potential of alcohols in TH under both catalytic and catalyst-free conditions. A special attention is paid to primary alcohols, because they are highly demanded as H-donors due to economic and environmental reasons. [Display omitted] • Primary C 1 -C 4 alcohols demonstrate high donor activity in furfural TH. • Catalyst-free TH of furfural and 1-PrOH has lower activation energy than 2-PrOH. • Selectivity to furfuryl alcohol of catalyst-free furfural TH reaches 70–80%. • Use of Ni/γ-Al 2 O 3 results in higher rate constants but the lower selectivity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TRANSFER hydrogenation
*FURFURAL
*FURFURYL alcohol
*ALCOHOL
*ACTIVATION energy
Subjects
Details
- Language :
- English
- ISSN :
- 08968446
- Volume :
- 193
- Database :
- Academic Search Index
- Journal :
- Journal of Supercritical Fluids
- Publication Type :
- Academic Journal
- Accession number :
- 161209613
- Full Text :
- https://doi.org/10.1016/j.supflu.2022.105815