Conversion of fuel-N into HCN and NH3 during the pyrolysis and gasification of coal and biomass in steam
were compared using fluidized-bed/fixed-bed and two-stage fluidized-bed/tubular reactors. During the pyrolysis
and gasification of coal and biomass in steam, the thermal cracking of volatile-N was the main route for the
formation of HCN while a small amount of HCN was formed from the breakdown of relatively unstable
N-containing structures in char. Our results indicate that once the fuel-N in both biomass and coal is condensed/polymerized into the solid-phase char-N during the gasification in steam, the main nitrogen-containing gaseous
product from char-N would be NH3. However, the thermal-cracking/reforming of volatile-N constitutes an
additional important route of NH3 formation during the gasification of biomass (e.g., cane trash) in steam
while this route is negligible for the gasification of coal. The selectivity of char-N toward HCN and NH3 is
largely controlled by char-N stability and/or the availability of H and/or other radicals during the gasification
of coal and biomass.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.