Aqua-Phase Catalytic Hydrogenation of Furfurol in the Presence of Pd/Sibunit Catalysts
Pd/Sibunit catalysts with palladium content 1 and 1.5 % were studied in aqua-phase hydrogenation of furfurol at different temperatures (323 and 363 K) and hydrogen pressure (0.5 and 2.0 MPa). The sample with palladium content 1.5 % exhibited activity in the studied reaction only at a temperature of 363 K. Under rigid reaction conditions (363 K, 2.0 MPa) the catalyst 1.5 % Pd/Sibunit has advantages over the samples based on carbon nanotubes (CNT) and technical-grade carbon (TC): it is more active than 1.5 % Pd/TC in furfurol transformation (transformation degree 96 %) and is highly selective (76 %) in the formation of furfuryl alcohol in comparison with 1.5 % Pd/CNT, with close degrees of furfurol transformation. A decrease in palladium content in the sample did not lead to worsening of the catalytic characteristics in the studied reaction under the most rigid reaction conditions. The degree of furfurol transformation on the sample 1 % Pd/Sibunit (91 %) turned out to be higher than that with the catalyst 1.5 % Pd/TC, while in the selectivity of the formation of furfuryl alcohol (77 %) it exceeded the sample 1.5 % Pd/CNT substantially.