Study On Catalytic Hydrogenation Of Bio-derived Furfural Into Furfuryl Alcohol And Pentanediol

With increasing concerns on diminishing fossil resources,deteriorating global environment and climate,seeking green and sustainable resources as the substitute for fossil resources is receiving worldwide attention in recent years.Biomass with a wide range of sources and low prices have attracted the attention of domestic and foreign researchers and are widely used in the preparation of various chemicals and fuel,biomass resources deserve to be development and research.In recent years,the preparation of high value-added chemicals from biomass-based furfural has become an efficient way of utilization.According to the existing reports and the latest research progress and existing problems,this thesis has carried out a series of high-value furfural conversion studies from the perspective of sustainable development,and prepared a series of green,efficient,and easy-to-use recovered catalysts.In this thesis,a series of environmentally-friendly and efficient boron doped magnetic zirconium-based catalysts,combined catalysts of Pt/C and CaO,and Pt-based hydrotalcite catalysts are explored for the reaction of furfural hydrogenation to prepare high value-added chemicals,furfuryl alcohol and pentanediol.A variety of charcterizations were adopted to analyse the tructure,element composition and morphology of catalysts above-mentioned,and the influential factors such as reaction temperature and reaction time on the catalytic activity of the catalyst was systematically investigated.The results show that the magnetic zirconium-based catalyst can efficiently catalyze the catalytic transfer hydrogenation of furfural to furfuryl alcohol,and decrease the activation energy,especially the activation energy over the Zr₁B₃FeO catalyst is as low as 48.3 k J/mol,which can provide theoretical guidance for the follow study on the kinetics of furfural to furfuryl alcohol.The precious metal Pt catalyst has good reducing ability and can effectively promote the hydrogenation conversion of furfuryl alcohol.By adding CaO to increase the alkalinity of the catalytic system to promote the production of pentanediol and tetrahydrofurfuryl alcohol,under the optimal reaction conditions,furfuryl alcohol 98μL,isopropanol 10 m L,100 mg each of Pt/C and CaO,reacted at 170℃ for 6 h,the selectivity of 1,5-pentanediol and 1,2-pentanediol reached the peak,the selectivity was 13%and 33.3%,respectively.In this thesis,the Pt group is introduced into the hydrotalcite catalyst in an unsupported form for the first time,and the reaction activity of the catalyst for the hydrogenation of furfural to 1,2-pentanediol and 1,5-pentanediol is verified.Under the optimal reaction conditions,the selectivity of 1,2-pentanediol is as high as 47.2%,and the selectivity of 1,5-pentanediol is 35.3%.In summary,on the basis of previous studies,this thesis successfully prepared three environmentally friendly,high-efficiency and green catalysts,including boron-doped magnetic zirconium-based catalysts,Pt/C,CaO combined catalysts,and Pt-based hydrotalcite.This research not only provides an economical and green process route for the high-value utilization of furfural,but also provides a new idea for the synthesis of biomass-based platform compounds.