Zirconium oxide supported noble metal catalyst, and preparation method and application thereof

By loading palladium nanoparticles onto a ZrO2 support and optimizing the preparation conditions, the problems of low activity and poor selectivity of existing noble metal catalysts in biomass hydrogenation reactions were solved. This resulted in the efficient preparation of DMF from HMF through hydrodeoxygenation, reducing the amount of formic acid used and equipment corrosion, and improving the stability and selectivity of the catalyst.

CN122164398APending Publication Date: 2026-06-09YANTAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANTAI UNIV
Filing Date
2026-05-08
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing precious metal catalysts exhibit low activity and poor selectivity in biomass hydrogenation reactions, have complex preparation processes, and suffer from low precious metal utilization and poor stability. In particular, during the hydrogenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran, the high amount of formic acid used leads to equipment corrosion and the generation of acidic wastewater.

Method used

Using mixed-phase ZrO2 as a support, palladium nanoparticles were loaded. By controlling the preparation conditions of ZrO2, its crystal phase composition, oxygen vacancy concentration and surface acidity were optimized, and a Pd/ZrO2 catalyst was prepared. This simplified the preparation process, reduced the amount of formic acid used, and enabled a highly efficient HMF hydrodeoxygenation reaction.

Benefits of technology

Under mild reaction conditions, the catalyst achieved 100% HMF conversion and 83% DMF selectivity, reducing the amount of precious metals and formic acid used, improving the stability and selectivity of the catalyst, and reducing equipment corrosion and the generation of acidic wastewater.

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Abstract

This invention discloses a zirconia-supported noble metal catalyst, its preparation method, and its application, belonging to the technical field of preparation and application of supported noble metal catalysts. Using zirconium nitrate as a precursor, zirconium hydroxide is obtained via co-precipitation, followed by high-temperature calcination to prepare a zirconia support with a specific crystal phase composition. Palladium nanoparticles are then loaded onto the ZrO2 surface using an impregnation-reduction method to obtain a Pd / ZrO2 catalyst. In the prepared catalyst, palladium nanoparticles are uniformly dispersed on the support surface, with an average particle size of 1.7 nm, and the support contains abundant acidic sites. This invention features a simple preparation method, low noble metal usage, and high catalyst activity, exhibiting excellent catalytic performance in the hydrogenation and deoxygenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran. Under low acid conditions of 150 °C, 1.5 MPa H2, and formic acid as the hydrogen donor, complete HMF conversion can be achieved, with a DMF selectivity of 83% and a conversion frequency of 224 h⁻¹. ‑1 Even after five cycles of use, it still maintains an 81% conversion rate and a 61% selectivity, showing good prospects for industrial application.
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