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Potential substitutes of natural gas and lignite fly ash as NO and HCN reducing agents, respectively, for heterogeneous reburning were examined in a bench-scale apparatus equipped with a simulated reburning and a burnout furnace. Selection of NO reducing agent is based on fuel volatility and nitrogen functionality. HCN reducing agent selection is based on literature data. A wide range of waste materials...
Recent study of heterogeneous reburning suggests effective NO reduction requires an adequate carbon source and a pool of catalysts that reduces not only NO, but also the reaction intermediate HCN [Chen WY and Tang L. Variables, kinetics and mechanisms of heterogeneous reburning. AIChE J 2001;47:2781-2797]. The current work demonstrates that ashes from lignite-fired power plants contain these desirable...
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