HETEROGENEOUS REBURNING BY MIXED FUELS

Chen, Wei-Yin ; Gathitu, Benson B.

University of Mississippi (United States)

关键词: Burnout;    01 Coal, Lignite, And Peat;    Kinetics;    Catalysts;    Oxides;   

DOI  :  10.2172/839991
RP-ID  :  NONE
RP-ID  :  FG26-02NT41552
RP-ID  :  839991

美国|英语

来源: UNT Digital Library

【 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.