Release of fuel-bound nitrogen in biomass during high temperature pyrolysis and gasification
- Univ. of Hawaii, Honolulu, HI (United States)
Pyrolysis and gasification of two biomass feedstocks with significantly different fuel-bound nitrogen (FBN) content were investigated to determine the effect of operating conditions on the partitioning of FBN among gas species. Experiments were performed in a bench-scale, indirectly-heated, fluidized bed reactor. Data were obtained over a range of temperatures and equivalence ratios representative of commercial biomass gasification processes. An assay of all major nitrogenous components of the gasification products was performed for the first time, providing a clear accounting of the evolution of FBN. Results indicate that: (1) NH{sub 3} is the dominant nitrogenous gas species produced during pyrolysis of biomass; (2) the majority of FBN is converted to NH{sub 3} or N{sub 2} during gasification; relative levels of NH{sub 3} and N{sub 2} are determined by thermochemical reactions which are affected strongly by temperature; (3) N{sub 2} appears to be produced from NH{sub 3} in the gas phase.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 349035
- Report Number(s):
- CONF-970701--
- Country of Publication:
- United States
- Language:
- English
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