本项目围绕纤维素一步转化为高值2,5-二甲基呋喃（DMF）和C5/C6烷烃液体燃料中高效固体组合催化剂制备和纤维素解聚与转化反应机理、产物控制规律的研究目标，构筑水-有机双相反应体系和基于5-羟甲基糠醛（HMF）中间产物转化的新路径，研究亲水性金属磷酸盐固体酸和疏水性金属-酸双功能催化剂的可控制备与性能调控规律，阐明纤维素水相解聚制备HMF过程中固体酸B酸/L酸协同催化的β-1,4糖苷键断裂、葡萄糖异构和果糖环化脱氧的反应机理和副产物抑制规律，揭示HMF有机相定向转化为DMF和C5/C6烷烃中金属-酸界面协同加氢脱氧的转化路径和产物调控机制，明晰过程强化条件下纤维素一步转化为上述液体燃料的耦合反应机理与传递-反应的协同作用机制。通过项目研究，解决纤维素解聚和选择性转化过程效率低和产物可调性差的关键问题，为纤维素生物质的高效高值化利用提供新思路。

This project focuses on preparation of efficient solid combined catalyst and relative mechanism and production controlling mechanism in one-pot transformation of cellulose to value-added liquid biofuel including oxygen contained 2,5-dimethyl furan (DMF) and C5/C6 alkanes. This project constructs water and organic contained bi-phase reaction system and new pathway based on 5-hydroxymethyl furan (HMF) intermediate formation and sequential transformation. In detail, this project implements the investigation on controllable preparation of hydrophilic and acidic solid metal phosphates and sheds light on the goal production formation and byproduct suppression mechanism of cellulose depolymerization to glucose, glucose isomerization to fructose and fructose dehydration to HMF in water by the synergistic effect of Bronsted and Lewis acidic sites over catalyst. On the other hand, this project, based on selective conversion of HMF into DMF in organic phase, is also carried out by the preparation of hydrophobic bi-functional catalyst involved metal and acid, and investigates partial hydrogenation and hydrodeoxygenation (HDO) of HMF to DMF, which involves the steps of hydrogenation of carbonyl group and HDO of the two hydroxyl groups in HMF molecule. Moreover, by adjusting the properties of bi-functional catalyst by choosing support, metal and acid component, complete HDO of HMF to C5/C6 alkanes will be also implemented by furan saturation, ring opening and HDO steps. By these investigation, the preparation methodologies of hydrophilic solid acid catalyst and hydrophobic, bi-functional metal-acid catalyst will be obtained, and the mechanisms of coupling reaction and diffusion-reaction will be mastered in one-pot conversion of cellulose to DMF and C5/C6 alkanes in water-organic bi-phase system. This project will give potential solution for poor activity and selectivity of ordinary, previous reported catalysts used in this transformation, and new idea for highly efficient utilization of cellulosic biomass.