Preparation And Performance Of Nd-Co-P Catalyst For Hydrogenation Of Biomass Platform Compounds

So far,environmental problems are becoming more and more serious.Biomass is widely considered to be the most likely material to replace petroleum and other fossil fuels in the production of chemical products.The development and utilization of biomass resources is of great significance to the improvement of ecological environment.At present,the hydrogenation of biomass mainly relies on metal structure catalysts such as Pt,Pd and Cu.Most of these catalysts have limitations such as sintering,passivation,poisoning and easy corrosion,and most of them have high cost.In view of the present mainly metal structure of biomass conversion of hydrogenation catalyst application limitation,we introduced the rare earth phosphate and preparation of a series of used for biomass olefine hydrogenation of nonmetal Nd-Co-P catalyst,by ICP-OES,XRD,XPS,SEM,HRTEM-EDS and a series of characterization methods shows that the Nd-Co-P catalyst for NdPO₄ closely combining with Co₂P of composite materials,can be written as（NdPO₄）_m/Co₂P,including NdPO₄:Co₂P mole ratio of 0.08-1.1（m）.Using NdPO₄ or Co₂P as reference,（NdPO₄）_m/Co₂P showed superior catalytic activity for hydrogenation.The yield ofγ-valerolactone could reach 98%stably in the aqueous phase at 4 MPa and 110℃with levulinic acid as the target.For furfural hydrogenation,（NdPO₄）_m/Co₂P reached furfuryl alcohol yield of over 97%after 4h at140℃and 4 MPa.Its excellent catalytic efficiency was as good as that of noble metal catalyst,and the reaction conversion frequency（TOF）value was up to 0.50 s^-1（10 times higher than Co₂P）,and it showed good cycling stability and corrosion resistance.Given in the process of transformation of furfural hydrogenation catalysts shows excellent catalytic performance,we through the reaction kinetics,in situ infrared,H₂-TPD,FAL-TPD,etc on the further analysis shows that the reactants on the（NdPO₄）m/Co₂P follow L-H mechanism,and Co₂P may only be in the reaction on the biomass raw material,and NdPO₄ has the unique ability of activation of hydrogen.These results indicate that rare earth like NdPO₄ phosphate can be used as a promising and reliable hydrogenation catalyst component,giving them,they replace existing active metal,breaking through any limits and applied to the similar furfural biomass catalytic hydrogenation transformation potential,and provide new green conversion technology relating to the hydrogenation of the reference.