Abstract
The effect of NH3 on NO reduction and formation was experimentally investigated using a homogeneous (gas phase reaction) or heterogeneous (with solid particles) tubular reactor.Without oxygen, neither NH3 decomposition nor NO reduction by NH3 was observed in homogeneous systems, whereas both reactions significantly did occur in heterogeneous systems. The formation of NO from NH3 with oxygen was remarkably promoted in the heterogeneous systems than in the homogeneous systems.A model for NO-NH3 reaction in the heterogeneous system was proposed based on the present results. For the reduction of NO emission from a two-stage fluidized bed combustor, the catalytic effect of solid particles in the upper bed was evaluated on the basis of the present model and the previous experimental data.
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