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- W1991569460 abstract "The pyrolysis mechanisms of O-acetyl-preserved hemicelluloses isolated from both hardwoods and softwoods have been investigated. Their chemical structures, pyrolysis kinetics, pyrolytic product distributions, and pyrolytic gaseous evolutions have been systematically studied. Hardwood hemicellulose was mainly composed of 4-O-methyl-d-glucurono-d-xylan and had high contents of O-acetyl and uronic acid units, whereas softwood hemicelluloses were composed of d-galacto-d-gluco-d-mannan and l-arabino-4-O-methyl-d-glucurono-d-xylan. A double-Gaussian distributed activation energy model has been introduced to simulate the pyrolysis kinetics. Hardwood hemicellulose pyrolysis showed lower activation energies than softwood hemicellulose pyrolysis. Hardwood hemicellulose pyrolysis mainly yielded furfural and acids, whereas for softwood hemicellulose pyrolysis, 5-hydroxymethylfurfural and anhydro sugars were typical products. The evolution behaviors of H2O, CO2, CO, and acids from the pyrolyzes of the four hemicelluloses are discussed." @default.
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- W1991569460 date "2015-06-01" @default.
- W1991569460 modified "2023-10-18" @default.
- W1991569460 title "Pyrolysis behaviors of four O-acetyl-preserved hemicelluloses isolated from hardwoods and softwoods" @default.
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- W1991569460 doi "https://doi.org/10.1016/j.fuel.2015.02.045" @default.
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