Study Of The Catalytic Performance Of Composite Transition Metal Materials On Bio-based Platform Chemicals To Small Organic Molecule

With the development of science and human society,the utilization of fossil fuels gradually aggravates the environmental pollution,thus,it is important to look for the ideal clean energy and their exploitation.Among the numerous renewable energy,biomass is recognized as the potential energy alternatives.Therefore,exploiting biomass energy will effectively relieve the shortage of energy sources and environmental problems.Recently,scientists have gradually developed chemical and biological methods to convert biomass to synthesis industrial fuels and high value chemicals.Among numerous studies,much attention has been paid to biomass based platform compounds catalytic conversion to synthesis value-added small organic molecules,which can be effectively applied in industrial,agriculture and manufacturing.In the second chapter,aim at catalytic transfer of methyl levulinate to γ-valerolactone,1,4-pentanediol and 1-pentanol,we used different methods to synthesis all kinds of copper-zirconia catalysts,and studied the main factors influencing their catalytic ability.By comparison,copper-zirconia with mild Cu/Zr molar ratio（2.5）and appropriate calcination temperature（550°C）showed higher catalytic activity,because it possessed more active species,abundant acid content and appropriate surface area.Under optimal conditions,excellent yields of gamma-valerolactone（75%）,1,4-pentanediol（39%）and 1-pentanol（13.8%）could be obtained using 2.5-CZ-550 catalyst.In the third chapter,aim at glucose conversion to 5-hydroxymethylfurfural,we used different methods to synthesis all kinds of zirconium phosphate-supported nano titanium dioxide catalysts（ZP-TiO₂）which were transition metal composite materials,and studied the main factors influencing their catalytic ability.By comparison,ZP-TiO₂ with mild Zr/P molar ratio（1:1）and appropriate TiO₂ addition（0.2g）showed higher catalytic activity,because it possessed more abundant acid content and appropriate Lewis acid/ Brnsted acid.In addition,the control of temperature and selection of system had a significant impact on the results.In saturated Na Cl-THF system at 180°C,50% yields of HMF with 90% glucose conversion could be obtained using 1-ZP-TiO₂-0.2 catalyst.