Enhanced Biomass Hydrolysis Dual Pretreatment Strategy
Explore a dual pretreatment strategy for enhanced biomass hydrolysis, improving glucan conversion rates using innovative methods and pilot plant treatments. Discover the potential benefits and findings of this approach in breaking down various biomass feedstocks efficiently.
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Dual Pretreatment Strategy for Enhanced Biomass Hydrolysis G. Brodeur, S. Ramakrishnanand J.C. Telotte Department of Chemical and Biomedical Engineering FAMU FSU College of Engineering 1
Even at the highest conversion there is still >15% of the material that is left inaccessible 100 Hydrolysis Time (hr) Dilute Acid Treatment (Pilot Plant) National Renewable Energy Laboratory (NREL) Corn Stover: 190 C; 1 min; 50 mg H2SO4/g dry biomass Florida Center for Renewable Chemicals and Fuels (UF) Sugarcane Bagasse: 190 C; 5 min; 0.5% w/w H3PO4 72 96 72 72 72 Glucan Conversion (%) 168 80 72 72 72 60 72 60 Sweet Sorghum Bagasse 72 48 40 Sugarcane Bagasse Sugarcane Bagasse Sugarcane Bagasse Sugarcane Bagasse Lignin 72 20 Switchgrass Switchgrass Cotton Stalk Corn Stover Corn Stover Corn Stover Corn Stover Aspen Aspen Pretreatment 0 Silverstein, R.A., et al., 2007 Jensen, J.R., et al., 2010 Schell, D.J., et al., 2003 Tian, S., et al., 2011 Zhang, J., et al., 2011 Rocha, G.M., et al., 2011 Geddes, C.C., et al., 2010 Yoon, L.W., et al., 2011 Li, C., et al., 2010 Wyman, C.E., et al., 2011 Um, B.H. et al., 2003 Um, B.H. et al., 2003 Our Work Our Work Cellulose Hemicellulose DA Treatment 2
Cell OH H Cell N-methyl morpholine N-oxide (NMMO) monohydrate ?? 76 Treatment Conditions Moderate temperatures (100 C) Short dissolution times (<3 hours) High solids loadings (up to 20% w/w) Petrovan et al., J. Appl. Polym. Sci.2001 This work reports data for 3-5% (w/w) Regeneration with anti-solvent (water) Benefits: Highly effective cellulose treatment Reported ability to recycle over 99% of solvent Biodegradable Raw feedstock will not completely dissolve - + 100 Glucan Conversion (%) 80 60 40 NMMO Treated alpha-cellulose untreated alpha-cellulose 20 0 0 20 40 Time (hr) 60 80 100 3
~98% Conversion ~91% Conversion Corn Stover Sugarcane Bagasse 100 100 DAWNT-CS DAWNT-SB Glucan Conversion (%) 80 80 Glucan Conversion (%) DATCS DATSB 60 60 NTCS NTSB 40 40 CS 20 20 SB 0 0 0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80 Time (hr) Time (hr) --Reaches maximum conversion of DATCS 48 hours faster!! --Nearly complete conversion after 72 hours 4
100 100 Corn Stover Sugarcane Bagasse Glucan Conversion (%) Glucan Conversion (%) 80 80 DAWNT-SB 1 % (w/w) hydrolysis solids loading DAWNT-SB 5 % (w/w) hydrolysis solids loading DAWNT-CS 1 % (w/w) hydrolysis solids loading DAWNT-CS 5 % (w/w) hydrolysis solids loading 60 60 40 40 20 20 0 0 0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80 Time (hr) Time (hr) 100 Glucan Conversion (%) 80 Fresh NMMO 1st Recycle NMMO 2nd Recycle NMMO 3rd Recycle NMMO 60 40 20 0 5 0 10 20 30 40 50 60 70 80 Time (hr)
