Production of levoglucosanan glucose from pyrolysis of cellulosic materials
Vacuum pyrolysis of cellulose within the temperature range of 300 to 500/sup 0/C provides a tar fraction containing mainly levoglucosan and glucose condensation products. It was found that pyrolysis proceeds at a much faster rate at the higher temperatures without detrimental effect on the yields. At 400/sup 0/C the reaction was essentially complete within 3 min yielding a tar that contained 39% levoglucosan and, upon mild acid hydrolysis, gave 49% D-glucose. The yields could be further improved by washing or treatment of cellulosic substrates with acids. Cotton hydrocellulose provided up to 58% levoglucosan or 77% D-glucose. This is the highest yield determined by unequiocal methods. Commonly available cellulosic materials such as wood and newsprint give very poor yields of levoglucosan. However, the yields could be improved substantially by acid washing or prehydrolysis to the extent that pyrolysis of these substrates may become an attractive industrial process. The data in this report provide the technical basis for such a process and resolve the existing controversies on the reported yields.
- Research Organization:
- Univ. of Montana, Missoula
- OSTI ID:
- 5113285
- Journal Information:
- J. Appl. Polym. Sci.; (United States), Vol. 23
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CELLULOSE
PYROLYSIS
GLUCOSE
SYNTHESIS
CHEMICAL REACTION YIELD
TEMPERATURE DEPENDENCE
TAR
ACID HYDROLYSIS
HIGH TEMPERATURE
PAPER
WOOD
ALDEHYDES
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
HEXOSES
HYDROLYSIS
LYSIS
MONOSACCHARIDES
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
SOLVOLYSIS
THERMOCHEMICAL PROCESSES
YIELDS
140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)