Aqueous fractionation of biomass based on novel carbohydrate hydrolysis kinetics
- Littleton, CO
A multi-function process for hydrolysis and fractionation of lignocellulosic biomass to separate hemicellulosic sugars from other biomass components comprising extractives and proteins; a portion of a solubilized lignin; cellulose; glucose derived from cellulose; and insoluble lignin from said biomass comprising: a) introducing either solid fresh biomass or partially fractioned lignocellulosic biomass material with entrained acid or water into a reactor and heating to a temperature of up to about 185.degree. C.-205.degree. C. b) allowing the reaction to proceed to a point where about 60% of the hemicellulose has been hydrolyzed in the case of water or complete dissolution in case of acid; c) adding a dilute acid liquid at a pH below about 5 at a temperature of up to about 205.degree. C. for a period ranging from about 5 to about 10 minutes; to hydrolyze the remaining 40% of hemicellulose if water is used. d) quenching the reaction at a temperature of up to about 140.degree. C. to quench all degradation and hydrolysis reactions; and e) introducing into said reaction chamber and simultaneously removing from said reaction chamber, a volumetric flow rate of dilute acid at a temperature of up to about 140.degree. C. to wash out the majority of the solubilized biomass components, to obtain improved hemicellosic sugar yields.
- Research Organization:
- Midwest Research Institute, Kansas City, MO (United States)
- DOE Contract Number:
- AC36-98GO10337
- Assignee:
- Midwest Research Institute (Kansas City, MO)
- Patent Number(s):
- US 6228177
- OSTI ID:
- 873707
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrolysis and fractionation of lignocellulosic biomass
Flowthrough pretreatment with very dilute acid provides insights into high lignin contribution to biomass recalcitrance
Related Subjects
fractionation
biomass
based
novel
carbohydrate
hydrolysis
kinetics
multi-function
process
lignocellulosic
separate
hemicellulosic
sugars
components
comprising
extractives
proteins
portion
solubilized
lignin
cellulose
glucose
derived
insoluble
introducing
solid
fresh
partially
fractioned
material
entrained
acid
water
reactor
heating
temperature
185
degree
-205
allowing
reaction
proceed
60
hemicellulose
hydrolyzed
complete
dissolution
adding
dilute
liquid
ph
below
205
period
ranging
10
minutes
hydrolyze
remaining
40
quenching
140
quench
degradation
reactions
chamber
simultaneously
removing
volumetric
flow
rate
wash
majority
obtain
improved
hemicellosic
sugar
yields
simultaneously removing
reaction chamber
flow rate
dilute acid
volumetric flow
biomass material
lignocellulosic biomass
biomass components
biomass comprising
acid liquid
separate hemicellulosic
components comprising
multi-function process
obtain improved
hemicellulosic sugars
cellulosic sugars
aqueous fraction
/127/435/999/