Dual Pretreatment Strategy for Enhanced Biomass Hydrolysis
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Transcript of Dual Pretreatment Strategy for Enhanced Biomass Hydrolysis
Dual Pretreatment Strategy for Enhanced Biomass Hydrolysis
G. Brodeur, S. Ramakrishnan and J.C. Telotte
Department of Chemical and Biomedical EngineeringFAMU – FSU College of Engineering
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DA Treatment
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., et
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Cor
n St
over
Cot
ton
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k
Asp
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Suga
rcan
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Swee
t Sor
ghum
Bag
asse
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over
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Suga
rcan
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agas
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Suga
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Suga
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agas
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Hydrolysis Time (hr)
Even at the highest conversion there is still >15% of the material that is left inaccessible
Dilute Acid Treatment (Pilot Plant) National Renewable Energy
Laboratory (NREL) Corn Stover: 190ᵒC; 1 min; 50
mg H2SO4/g dry biomass Florida Center for Renewable
Chemicals and Fuels (UF) Sugarcane Bagasse: 190ᵒC; 5
min; 0.5% w/w H3PO4
Pretreatment
Hemicellulose
Lignin
Cellulose
DA Treatment
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N-methyl morpholine N-oxide (NMMO) monohydrate
Treatment Conditions Moderate temperatures (100ᵒC) 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
Amine Oxide Dissolution (NMMO)
N
O
H3C O
Cell OH
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CellH
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NMMO Treated alpha-celluloseuntreated alpha-cellulose
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DAWNT-CS
DATCS
NTCS
CS
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luca
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DAWNT-SB
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SB
Pretreatment Comparison
Corn Stover Sugarcane Bagasse
--Reaches maximum conversion of DATCS 48 hours faster!!
~98% Conversion ~91% Conversion
--Nearly complete conversion after 72 hours4
Increased Loadings & NMMO Recycle
Corn Stover Sugarcane Bagasse
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DAWNT-CS 1 % (w/w) hydrolysis solids loadingDAWNT-CS 5 % (w/w) hydrolysis solids loading
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DAWNT-SB 1 % (w/w) hydrolysis solids loading DAWNT-SB 5 % (w/w) hydrolysis solids loading
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Fresh NMMO1st Recycle NMMO2nd Recycle NMMO3rd Recycle NMMO