Abstract
We investigated the effect of oxide supports on the hydrogenation of furfural over Pd catalysts on various supports (Al2O3, SiO2, TiO2, CeO2, and ZrO2). Pd catalysts (5 wt%) prepared by chemical reduction on various supports. The dispersion and uniformity of Pd were affected by the properties of the support and by the nucleation and growth of Pd. The conversion of furfural was enhanced by greater Pd dispersion. The selectivity for cyclopentanone and tetrahydrofurfuryl alcohol was affected by physicochemical properties of Pd catalyst and reaction parameters. High Pd dispersion and high acidity of the catalyst led to greater C=C hydrogenation, thereby, generating more tetrahydrofurfuryl alcohol. The Pd/TiO2 catalyst showed the highest cyclopentanone yield than other catalysts. The Pd/TiO2 catalyst exhibited the >99% furfural conversion, 55.6% cyclopentanone selectivity, and 55.5% cyclopentanone yield under the optimal conditions; 20 bar of H2, at 170 °C for 4 h with 0.1 g of catalyst.
Highlights
Lignocellulosic biomass is considered a potential source of renewable energy for mitigating the energy crisis created by the depletion of crude oil
Furfural formed from biomass-derived resources has been used as a raw material to produce highly valuable materials, such as tetrahydrofurfuryl alcohol (THFAL), furfuryl alcohol (FAL), and cyclopentanone (CPO) [1,2,3,4]
The furfural conversion and CPO selectivity of the Pd/Al2 O3 and Pd/TiO2 catalysts gradually increased as the reaction temperature was increased from 100 to 190 ◦ C, whereas the selectivity for THFAL gradually decreased from 13.7% to 5% with the Pd/Al2 O3 catalyst
Summary
Lignocellulosic biomass is considered a potential source of renewable energy for mitigating the energy crisis created by the depletion of crude oil. Certain factors affect the activity and selectivity of a catalyst, such as the metal dispersion, acid/base properties, surface chemical state, and metal-support interaction. We prepare Pd supported on different oxide supports (Al2O3, SiO2, TiO2, CeO2, and ZrO2) by a chemical reduction method for the catalytic hydrogenation of furfural to produce CPO. Bhogeswararao et al investigated Pd and Pt supported catalyst for selective hydrogenation of furfural to FAL or THFAL [11]. A few studies have reported the effects of oxide supports on the catalytic performance of Pd catalysts for furfural hydrogenation. The results confirm that the Pd dispersion affects the conversion of furfural
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
