Release of Fuel-Bound Nitrogen during Biomass Gasification

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• 作者：Jiachun Zhou ; Stephen M. Masutani ; Darren M. Ishimura ; Scott Q. Turn ; and Charles M. Kinoshita
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2000
• 出版时间：March 2000
• 年：2000
• 卷：39
• 期：3
• 页码：626 - 634
• 全文大小：247K
• 年卷期：v.39,no.3(March 2000)
• ISSN：1520-5045

文摘

Gasification of four biomass feedstocks (leucaena, sawdust, bagasse, and banagrass) withsignificantly different fuel-bound nitrogen (FBN) content was investigated to determine the effectsof operational parameters and nitrogen content of biomass on the partitioning of FBN amongnitrogenous gas species. Experiments were performed using a bench-scale, indirectly heated,fluidized-bed gasifier. Data were obtained over a range of temperatures and equivalence ratiosrepresentative of commercial biomass gasification processes. An assay of all major nitrogenouscomponents in the gasification products was performed for the first time, providing a clearaccounting of the evolution of FBN. Important findings of this research include the following:(1) NH<SUB>3 and N₂ are the dominant species evolved from fuel nitrogen during biomass gasification;>90% of FBN in feedstock is converted to NH₃ and N₂; (2) relative levels of NH₃ and N₂ aredetermined by thermochemical reactions in the gasifier; these reactions are affected stronglyby temperature; (3) N₂ appears to be primarily produced through the conversion of NH₃ in thegas phase; (4) the structural formula and content of fuel nitrogen in biomass feedstocksignificantly affect the formation and evolution of nitrogen species during biomass gasification.