High production of furfural by flash pyrolysis of C6 sugars and lignocellulose by Pd-PdO/ZnSO4 catalyst

Qiaoqiao Zhou, Jinxing Gu, Jingwei Wang, Anthony Girolamo, Sasha Yang and Lian Zhang ()
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Qiaoqiao Zhou: Monash University
Jinxing Gu: Monash University
Jingwei Wang: Monash University
Anthony Girolamo: Monash University
Sasha Yang: Monash University
Lian Zhang: Monash University

Nature Communications, 2023, vol. 14, issue 1, 1-14

Abstract: Abstract Furfural (C5H4O2) is an important platform chemical for the synthesis of next-generation bio-fuels. Herein, we report a novel and reusable heterogeneous catalyst, Pd-PdO/ZnSO4 with 1.1 mol% palladium (Pd), for the production of furfural by flash pyrolysis of lignocelluloses at 400 °C. For both dry and wet C6 cellulose and its monomers, the furfural yields reach 74–82 mol%, relative to 96 mol% from C5 xylan and 23–33 wt% from sugarcane bagasse and corncob. The catalyst has a well-defined structure and bifunctional property, comprising a ZnSO4 support for the dehydration and isomerization of glucose, and a local core-shell configuration for metallic Pd0 encapsulated by an oxide (PdO) layer. The PdO layer is active for the Grob fragmentation of formaldehyde (HCHO) from glucose, which is subsequently in-situ steam reformed into syn-gas (i.e. H2 and CO), whereas the Pd0 core is active in promoting the last dehydration step for the formation of furfural.

Date: 2023
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DOI: 10.1038/s41467-023-37250-0

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