Pyrolysis of poly-l-leucine under combustion-like conditions |
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Authors: | Karl-Martin Hansson,Lars-Erik Å mand,Franz Winter |
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Affiliation: | a Department of Energy Conversion, Chalmers University of Technology, S-41296 Göteborg, Sweden b Institute of Chemical Engineering, Vienna University of Technology, A-1060 Wien, Austria |
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Abstract: | 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 °C and the pyrolysis gases were analysed with a FT-IR spectrometer. HCN, NH3 and HNCO were identified as the main nitrogen-containing species, while neither NO nor N2O were found among the pyrolysis gases. At 700 °C, as much as 58% of the nitrogen content was converted into HCN and 31% into NH3. The HCN/NH3 ratio increased from about 1.9 at 700 °C to above 2.2 at 800 °C. Pyrolysis of another protein, poly-l-proline, at 800 °C gave a HCN/NH3 ratio close to 10. This revealed that the protein's amino acid composition has a marked impact on the composition of the pyrolysate. |
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Keywords: | Pyrolysis Protein Biomass HCN NH3 HNCO |
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