Heterogeneous Reburning By Mixed Fuels

Anderson Hall

关键词: BURNOUT;    CATALYSTS;    CHARS;    KINETICS;    LIGNITE;    OXIDES;   

DOI  :  10.2172/970973
RP-ID  :  None
PID  :  OSTI ID: 970973
Others  :  TRN: US201003%%763

美国|英语

来源: SciTech Connect

【 摘 要 】

Recent studies of heterogeneous reburning, i.e., reburning involving a coal-derived char, have elucidated its variables, kinetics and mechanisms that are valuable to the development of a highly efficient reburning process. Young lignite chars contain catalysts that not only reduce NO, but they also reduce HCN that is an important intermediate that recycles to NO in the burnout zone. Gaseous CO scavenges the surface oxides that are formed during NO reduction, regenerating the active sites on the char surface. Based on this mechanistic information, cost-effective mixed fuels containing these multiple features has been designed and tested in a simulated reburning apparatus. Remarkably high reduction of NO and HCN has been observed and it is anticipated that mixed fuel will remove 85% of NO in a three-stage reburning process.