Hydrogenation and hydrogenolysis are the two essential processes which have massive importance on the industrial level to produce value-added chemicals. The hydrogenation or hydrogenolysis of 5-HMF; a key furan compound obtained from the cellulosic biomass led to the formation of 2,5-dimethylfuran (DMF), which is considered as a future biofuel globally because of its high energy density (32.8 MJ/L), water immiscibility and high boiling point (96 °C). The palladium-based catalysts are the most crucial catalysts used in industries for various chemical transformations specifically in hydrogenation reactions. In this review article, we examined the general progress of palladium catalysts on various supports including charcoal, metal organic framework, metal oxides, graphene oxides, acidic supports and critically assessed how the influence of various supports controls the conversion of 5-HMF to DMF. Moreover, the present research's limitations and flaws are also discussed. In the concluding section, we explore the unique catalytic properties necessary for achieving the desired conversion, which aids researchers in developing a suitable catalyst. Overall, palladium catalysis is still in great shape and will require a critical look in the future.

中文翻译：

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不同载体上钯基催化剂用于 5-羟甲基糠醛 (HMF) 氢解制 2,5-二甲基呋喃 (DMF) 生物燃料的综合研究


加氢和氢解是在工业水平上生产增值化学品的两个重要过程。 5-HMF的氢化或氢解；从纤维素生物质中获得的一种关键呋喃化合物导致了 2,5-二甲基呋喃 (DMF) 的形成，由于其高能量密度 (32.8 MJ/L)、水不混溶性和高沸点，DMF 被认为是全球未来的生物燃料（96°C）。钯基催化剂是工业中用于各种化学转化（特别是加氢反应）的最重要的催化剂。在这篇综述文章中，我们研究了钯催化剂在各种载体上的总体进展，包括木炭、金属有机骨架、金属氧化物、石墨烯氧化物、酸性载体，并严格评估了各种载体如何影响5-HMF向DMF的转化。此外，还讨论了当前研究的局限性和缺陷。在结论部分，我们探索了实现所需转化所需的独特催化特性，这有助于研究人员开发合适的催化剂。总体而言，钯催化仍然处于良好状态，未来需要进行批判性的审视。