Study On Catalytic Conversion Of Biomass Furan Compounds To Intermediate Chemicals

As a potential raw material for the production of liquid fuels and chemicals in place of non-renewable petrochemical energy,biomass has received increasing attention from scientific researchers in recent years.The catalytic transformation of biomass-based platform molecules,such as 5-hydroxymethylfurfural（HMF）,has become one of the focuses of research.In this dissertation,a series of studies have been conducted for selective hydrodeoxygenation of 5-hydroxymethylfurfural（HMF）to2,5-dimethylfuran（DMF）.The reaction catalyst for selective hydrodeoxygenation of5-hydroxymethylfurfural（HMF）to 2,5-dimethylfuran（DMF）is mainly divided into two aspects.On the one hand,we successfully achieved the use of g-C₃N₄ precursors such as melamine to prepare active Fe-N-C catalyst for the selective HDO of HMF to DMF.The DMF yield reached 85.7%at complete conversion of HMF.On the other hand,for non-metal N-C catalyst research,catalyst prepared by the pyrolysis of melamine on activated carbon at 700^°C was demonstrated to be the most active catalyst.The yield of DMF was as high as 93.4%,and the stability of the catalyst was better.The effect of pyrolysis temperature,support,iron content,the types of g-C₃N₄ and iron precursors,and N/Fe ratio were explored thoroughly,and reaction parameters such reaction temperature and H₂ pressure were also investigated.Based on the investigations,the reaction pathways for the HDO of HMF to DMF were proposed for the present catalyst system.Finally,the heterogeneous non-noble Fe catalyst and non-metal N-C catalysts characterized by XPS,XRD,BET,ICP-AES,TEM,and H₂-TPR.