| With the rapid depletion and environmental pollution of oil and other traditional resources isincreasing, development and utilization of biomass energy has become one of the main topics ofcurrent research. So how togreen and efficient development and utilization of renewableresources to generate bio ethanol with cellulose based has become an important issuein today’ssociety, the strategy of sustainable development. This papercompared the carbon based solidacid catalyst prepared with different carbon sources on cellulose hydrolysis reactionperformance, and to solve the problem of product and catalyst separation of carbon based solidacid catalyst with magnetic.This paper prepared four kinds of carbon based solid acid catalyst with glucose, sucrose,starch, cellulose as the carbon source for thehy-drothermal carbonization method, analyses theinfluence of reaction temperature, reaction time and other factors on the surface acidity of thecatalyst. Different carbon source prepared catalyst can be applied intocellulose hydrolysisreaction, the catalyst activity size were prepared with different carbon sources of glucose>sucrose> starch> cellulose. At the same time, the catalyst was used in hydrolysis of cellulosein ionic liquid [MMIM]DMP pretreatment, hydrolysis yields improved found.Among them, thesolid acid using glucose as carbon substrate in the hydrolysis reaction of total reducing sugar(TRS) and glucose yields were47.4%and30.1%.The catalyst in the cellulose hydrolysis reaction and product separationdifficult problem, inthis paper, glucose and nano ferroferric oxide as raw materials, was prepared by hydrothermalsynthesis reaction of carbon based solid acid catalyst with magnetic. The kinetics of cellulosehydrolysis catalyst in response to conditions were optimized to obtain the catalyst surfacemodel, the optimal preparation conditions were: reaction temperature160℃, reaction ofglucose with Fe3O4nanoparticles molar ratio3.85:1, reaction time20h, the surface acidity of 1.43mmol/gcatalyst. Through structure and performance characterization of the catalyst showedthat the catalyst synthesis, surface containing-SO3Hbut also the existence of-COOH andphenolic hydroxyl groups, the size of1-20μ m amorphous carbon particles coated with ironoxide, a strong magnet and in267℃occurs only when the. The catalyst was used in hydrolysisof cellulose, get the total reducing sugar (TRS) and glucose yields were48.2%and27.6%,glucose57.2%selectivity. At the same time, the use of different ionic liquid [AMIM]Cl,[BMIM]Cl,[MMIM]DMP pretreatment of cellulose, and the use of catalytic cellulose magneticcarbon based solid acid catalyst was found after the hydrolysis of three ionic liquids on thecontribution of [MMIM]DMP>[AMIM]Cl>[BMIM]Cl hydrolysis of cellulose. The[MMIM]DMP pretreatment cellulose using magnetic carbon based solid acid catalyst TRS afterhydrolysis yield and glucose were54.5%,32.8%, higher than the direct use of selective catalysthydrolysis yield and glucose increased from57.2%to60%. At the same time, the catalyst hasreusability. |
