The role of lignin and lignin-like materials during wood hydrolysis

Journal Article · Thu Jan 01 00:00:00 EST 1981 · J. Eng. Appl. Sci.; (United States)

OSTI ID:5495409

Zaher, F A

The nature of the material precipitating from the acid prehydrolysates and hydrolysates of wood upon storage has been investigated. This material was analyzed for its sugar content, ultraviolet spectra, elemental composition, molecular weight distribution, and thermogravimetric behavior. All the results indicate that this material has the same properties as lignin. The results suggest also that this material is neither a resinification product from sugar decomposition nor extraneous materials of wood (resins, tannins, etc.). It is suggested, too, that the extraction of this material along with sugar during hydrolysis and prehydrolysis causes a considerable error in the results of wood analysis using standard methods based on weight loss. The actual percentages of lignin in the wood samples tested appear to vary from two to four times their values measured by standard methods. Consequently, the actual cellulose content of these materials may be far lower than has been reported. This has serious implications for schemes based on biomass conversion.

• Research Organization: National Research Centre, Dokki, Cairo, Egypt
• OSTI ID: 5495409
• Journal Information: J. Eng. Appl. Sci.; (United States), Vol. 1:3
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
LIGNIN
CHEMICAL PROPERTIES
PHYSICAL PROPERTIES
WOOD
ACID HYDROLYSIS
BIOCONVERSION
CELLULOSE
CHEMICAL REACTION YIELD
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
HYDROLYSIS
LYSIS
ORGANIC COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
SOLVOLYSIS
YIELDS
140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)