Evaluation of organosolv processes for the fractionation and modification of corn stover for bioconversion

Journal Article · Wed Apr 01 04:00:00 EST 1987 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260290506· OSTI ID:6526505

Lee, Y H; Robinson, C W; Moo-Young, M

Corn stover was pretreated for compositional fractionation and structural modification for maximum conversion of carbohydrate to soluble sugars. The process scheme consisted of three steps: (1) mild prehydrolysis if dilute sulfuric acid, (2) delignification with various organosolv solvents, and (3) enzymatic hydrolysis in an agitated bead reactor. Prehydrolysis of corn stover can be achieved at temperature ranging from 95 to 120/sup 0/C, which is a much milder condition than must be applied to wood. Various organosolv solvents, including several alcohols with acid as catalyst, ethylene glycol, and its derivatives, and amines were used for delignification of the prehydrolyzed corn stover. The low enzymic conversion (20-37%) of prehydrolzyed and solvent-extracted corn stover that was achieved implies that lignin is not the only major barrier for enzymatic hydrolysis. Modification of cellulose structure also should be accomplished to achieve a high degree of conversion. Enzymatic hydrolysis in the agitated bead system increased the rate and extent of conversion of corn stover substantially compared to systems without beads.

• Research Organization: Univ. of Waterloo, Ontario
• OSTI ID: 6526505
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 29:5; ISSN BIBIA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
CARBOHYDRATES
CEREALS
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
DECOMPOSITION
DELIGNIFICATION
ENZYMATIC HYDROLYSIS
EVALUATION
EXTRACTION
FRACTIONATION
GRASS
HYDROLYSIS
LIGNIN
LYSIS
MAIZE
ORGANIC COMPOUNDS
PLANTS
POLYSACCHARIDES
SACCHARIDES
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVOLYSIS