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Bark pellets have been pyrolyzed in a fluidized bed reactor at temperatures between 700 and 1000 o C. Identified nitrogen-containing species were hydrogen cyanide (HCN), ammonia (NH 3 ), and isocyanic acid (HNCO). Quantification of HCN and to some extent of NH 3 was unreliable at 700 and 800 o C due to low concentrations. HNCO could not be quantified with any accuracy...
Two cyclic amides, 2-pyridone and 2,5-diketopiperazine (DKP), were pyrolysed at temperatures ranging from 700 to 1100 o C. Pyridone is the only one of the four main nitrogen functionalities found in coal that is likely to form HNCO under pyrolysis. DKP is a primary pyrolysis product from proteins, which are the main nitrogen source in biomass. The formation of HNCO from biomass has been suggested...
The protein poly-l-leucine has been used as a model compound for the nitrogen in biomass fuels. It was pyrolysed in a fluidised bed at 700 and 800 o C and the pyrolysis gases were analysed with a FT-IR spectrometer. HCN, NH 3 and HNCO were identified as the main nitrogen-containing species, while neither NO nor N 2 O were found among the pyrolysis gases. At 700 o C,...
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