Catalytic hydrogenation of furfuryl alcohol into pentanediol over Pt/CaO materials
A series of Pt/CaO catalysts were synthesized via impregnation method and applied for the selective hydrogenation of bio-based furfuryl alcohol into pentanediol.The physicochemical characteristics of the as-prepared catalysts were comprehensively characterized through X-ray diffractometer,scanning electron microscopy,CO2-temperature programmed desorption,N2 isothermal adsorption-desorption,X-ray photoelectron spectroscopy,and thermogravimetric-differential thermal analysis.The experimental results showed that the Pt/CaO-600 catalyst exhibited excellent catalytic activity towards furfuryl alcohol hydrogenation.Gratifyingly,the furfuryl alcohol conversion achieved 99.8%,and the yields of 1,2-pentanediol and 1,5-pentanediol were 48.6%and 21.5%respectively at 210℃under 4MPa H2.The good activity of Pt/CaO could be attributed to the fact that the carrier CaO provided appropriate amounts of basic sites,which facilitated the ring-opening reaction of furfuryl alcohol,thus improving the conversion and pentanediol selectivity.Moreover,the as-prepared Pt/CaO also exhibited excellent performance in recycling experiments,wherein the yields of 1,2-pentanediol and 1,5-pentanediol reached 40.3%and 17.0%respectively with 96.5%furfuryl alcohol conversion after being repeated four times.