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Bio-oil obtained from fast pyrolysis of lignocellulosic biomass usually contains up to 30% of pyrolytic lignin that mainly consists of phenolic oligomers. Phenolic oligomers are difficult to upgrade into useful products since they are non-volatile and viscous, and highly reactive. The present study investigates the origin of phenolic oligomers during fast pyrolysis. Lignin was pyrolyzed in a micropyrolyzer...
Nitrogen-containing species in bio-oils obtained from fast pyrolysis of switchgrass were studied using high resolution mass spectrometry at various harvest times throughout the year. Almost three hundred chemical compositions of nitrogen species were determined through efficient ionization and accurate mass information. N 2 is the most abundant heteroatom class, followed by NO, N 2 ...
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