固体酸方法降解纤维素.ppt

一.纤维素降解为葡萄糖 二.葡萄糖降解为HMF 目 录 Nature,2005,438(10),178 Angew. Chem. Int. Ed. 2004, 43, 2955 –2958 J. AM. CHEM. SOC. 2008,130(38),12787-12793 Chem. Mater. 2006, 18, 3039 3045 Green Chem., 2008, 10, 1033–1037 Selectivity=90%, yield=40.5% Chem. Commun., 2010, 46, 6935–6937 In addition, the mesoporous structure also facilitates the transportation of large molecules (such as glucose, cellobiose, cellotriose) in comparison with microporous carbons AC-N-SO3H-250 150 ℃,24h cellulose glucose Cov=74.3%, yield=61% cellulose glucose Cov=94.4%, yield=74.5% CMK-3 150 ℃,24h cellulose glucose yield=16.7% BC-SO3H/H2O 90℃ Microwave,350W,60min Green Chem., 2010, 12, 696–700 ChemSusChem., 2011,4,55–58 amorphous cellulose Fe3O4–SBA–SO3H H2O,150 ℃ glucose Green Chem., 2010, 12, 1560–1563 Si33C66-823-SO3H cellulose 433K,24h,water glucose Sel=60.7%,yield=50.4% Yield=50% Chem. Mater. 2009, 21, 186–193 AC-SO3H亲水性反应，较小表面积2m2/g，固载到SBA-15上有较大的比表面积，催化疏水性反应。比表面积为700-1000m2/g Glucose HMF Chem. Commun., 2009, 6276–6278 | Chem. Commun., 2010, 46, 1115–1117 glucose Isomerase, borate 70℃,8h frucose HCl, water- butanol 190℃,45min HMF yield=63.3% Con=50%,yield=28.2% 加入硼酸钠yield=87.8% Green Chem., 2011, 13, 810–812 cellulose RSO3H ，M(OTf)3, in MeOH, N2 0.5MPa,180℃,5h methyl levulinate Yield=75% the ?rst part is the solvolysis of cellulose to sugars, which is mainly catalyzed by PTSA, the second part is the conversion of sugars to methyl levulinate, which is mainly catalyzed by In(OTf)3 Solid acid+base 酶 + 酸 Lewis acid + Br?nsted acid Green Chem., 2011, 13, 109–114 fructose B(OH)3 NaCl, MIBK: aqueous=4:1 150 ℃,45min HMF con=92% sel=65% yield=60% glucose HMF yield=14% 150 ℃,5h ChemSusChem 2010, 3, 350 – 355 sel=87.2%, yield=72.3% HMF [NMP]+[CH3SO3]- 2h,90℃ fructose HMF Glucose [EMIMCl],100℃,Cr2+ [BMIM]Cl,100℃,NHC-M,Cr2+ DMA-LiBr,Cr2+ 68% 81% 80% Fructose Glucose HMF Cr2+, ionic liquid 86% H+ Green Chem., 2009, 11, 1746–1749 SCIENCE,2007,16,1597-1599 ANGEW