我国农林废弃生物质亟待高效利用，其高值化产品呋喃是能源化工领域重要的有机合成基础原料，受呋喃产量限制，呋喃下游重要衍生物仍主要依赖石化资源。传统工艺生产呋喃，仅着眼利用生物质中的半纤维素，大量有潜力的纤维素随木质素等残渣排出；而分步利用综纤维素的过程十分繁琐。鉴于此，本项目提出基于木质纤维素全量利用、综纤维素协同转化的生物质水相降解与油相分解“一锅”共耦合定向制备呋喃的新工艺，针对糠醛类降解产物（5-羟甲基糠醛（HMF）、糠醛）在水/油两相溶剂体系中传质阻力大、协同转化困难等关键问题，将深入研究基于水热焦的生物质水热降解过程强化机制，探索双功能钯催化剂催化HMF与糠醛协同分解机理，揭示生物质水相降解与油相分解协同耦合调控机制。预期成果可为生物质高效转化定向制备呋喃提供必要的理论依据，对提高农林废弃生物质利用率，减少我国呋喃下游重要衍生物对石化资源的依赖等具有重要科学意义和应用前景。

The agricultural and forestry waste biomass need to be efficiently utilized in China. As a high-value product, furan is one of the most important basic raw material of organic synthesis in energy and chemical industry fields. Limited by the furan output, the important downstream derivatives of furan are still over-reliant on fossil fuel. The traditional production technologies of furan from agricultural and forestry waste biomass only focus on the utilization of hemicellulose, and the massive potential but unconverted cellulose is normally expelled with other residues. Furthermore, the stepwise utilization of holocellulose is too complicated. Therefore, a new selective production process of furan via water-phase degradation coupled with oil-phase decomposition based on based on the full use of lignocellulosic biomass, cooperative conversion of holocellulose is proposed in the project. In view of the key issues, such as the large mass transfer resistance in the aqueous/organic solvent biphase system and the difficult cooperative decomposition of degradation products (5-hydroxymethylfurfural (HMF) and furfural), the hydrothermal degradation mechanism of biomass enhanced by hydrochar will be deeply studied, the cooperative decomposition mechanism of HMF and furfural catalyzed by bifunctional palladium catalysts will be explored, and the new synergistic coupling mechanism of biomass water-phase degradation and furfurals oil-phase decomposition will be revealed. The expected research achievements will not only benefit the production of furan from high efficient conversion of biomass, but also provide a new way to improve the agricultural and forestry waste biomass utilization ratio, and reduce the dependence of important downstream derivatives of furan on fossil fuel.