Tang, Yiwei, et al. Chemical Engineering Journal 508 (2025): 160968.
Furfuryl alcohol (FFA), a versatile biomass-derived platform chemical, was directly converted into 1,5-pentanediol (1,5-PDO) using a NiLa@ZrO2 catalyst, providing a sustainable route for the production of polyesters, polyurethanes, and fungicides. The catalyst design combined La species with ZrO2 to increase the abundance of basic sites and oxygen vacancies, while the close proximity of Ni0 and basic sites facilitated both homolytic and heterolytic dissociation of molecular hydrogen, enhancing hydrogenation efficiency.
Catalytic reactions were conducted in a 10 mL autoclave at stirring speeds of 1000 rpm. A typical reaction involved 1.0 mmol FFA, 0.1 g catalyst, and 5 mL isopropanol. After purging with H2 three times and pressurizing, the reactor was heated between 120-200 °C for a controlled duration. Post-reaction, the solution was filtered, and products were quantified via GC-FID and GC-MS analysis.
Mechanistic investigations revealed that the C=C bond of FFA was initially hydrogenated to tetrahydrofurfuryl alcohol, followed by heterolytic cleavage of the C2-O bond activated by the catalyst's basic sites and oxygen vacancies, yielding 1,5-PDO with up to 72.5 % selectivity. Catalyst recyclability was demonstrated through multiple cycles, with spent catalysts recovered, washed with ethanol, dried under vacuum, and reused without significant activity loss.
This study illustrates that furfuryl alcohol can be efficiently upgraded to 1,5-PDO using a non-precious metal catalyst, highlighting a practical, green approach for converting renewable C5 feedstocks into high-value diols for industrial polymer and chemical applications.