Process for chemical separation of the three main components of lignocellulosic biomass
Acid prehydrolysis with chemical delignification was studied as a method for fractionating lignocellulosic biomass into hemicellulose, lignin and cellulose. Experiments with wheat straw show that hemicellulose can be quantatively separated by prehydrolysis, but the structure of the residue is substantially modified. Delignification of this residue by conventional methods gives significant losses of polysaccharides and a degraded cellulose. The efficiency of the separation can be increased by nonconventional delignification, e.g. chlorination by Cl. In this case, the sugar losses are minimal and further degradation of cellulose during delignification can be avoided, while lignin is quantatively recovered from the pulping liquors.
- Research Organization:
- School of Chemical Engineering, Purdue Univ, West Lafayette, IN 47907
- OSTI ID:
- 7011320
- Journal Information:
- Ind. Eng. Chem., Prod. Res. Dev.; (United States), Vol. 21:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CELLULOSE
SEPARATION PROCESSES
HEMICELLULOSE
LIGNIN
STRAW
ACID HYDROLYSIS
DELIGNIFICATION
WHEAT
CARBOHYDRATES
CEREALS
CHEMICAL REACTIONS
DECOMPOSITION
GRAMINEAE
GRASS
HYDROLYSIS
LYSIS
ORGANIC COMPOUNDS
PLANTS
POLYSACCHARIDES
SACCHARIDES
SOLVOLYSIS
140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)