Analytical pyrolysis of hardwood and softwood lignins and its use in lignin-type determination of hardwood vessel elements
Pyrolysis, GC and mass spectrometry were performed on milled wood lignins and wood samples. Among the major pyrolysis products identified from loblolly pine lignin were: guaiacol, 4-methylguaiacol, 4-vinylguaiacol, vanillin, coniferaldehyde and coniferyl alcohol. White oak lignin pyrolysis products included: guaiacol, 4-methylguaiacol, vanillin, 2,6-dimethoxyphenol, 4-methyl-2,6-dimethoxyphenol, syringaldehyde and sinapaldehyde. By the identification of pyrolysis products it is thus possible to classify lignins as either guaiacyl-type or syringyl/guaiacyl-type. Pyrolysis of isolated vessel elements from white oak, white birch (Betula papyrifera) and American elm (Ulmus americana) indicated that vessel lignin is of the syringyl/guaiacyl type. 14 references.
- Research Organization:
- USDA Forest Service, Madison, WI
- OSTI ID:
- 5889770
- Journal Information:
- J. Wood Chem. Technol.; (United States), Vol. 3:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LIGNIN
PYROLYSIS
STRUCTURAL CHEMICAL ANALYSIS
WOOD
BIRCHES
CHEMICAL ANALYSIS
CLASSIFICATION
GAS CHROMATOGRAPHY
MASS SPECTROSCOPY
OAKS
PINES
PYROLYSIS PRODUCTS
TREES
CARBOHYDRATES
CHEMICAL REACTIONS
CHROMATOGRAPHY
CONIFERS
DECOMPOSITION
ORGANIC COMPOUNDS
PLANTS
POLYSACCHARIDES
SACCHARIDES
SEPARATION PROCESSES
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)