A novel rotary reactor was proposed for nitrogen oxides (NO x ) reduction by carbon monoxides (CO) in order to avoid the oxygen inhibition effect. NO x adsorption and reduction were separated into two different zones in the proposed rotary reactor. NO x in the flue gas was adsorbed onto the catalyst surface in the adsorption zone and then reduced by the reducing gas in the reduction zone. The performance of the proposed reaction process was investigated in a simulated rotary reactor. The catalysts used were lab synthesized, Fe and Co co-impregnated over activated semi-coke. The results showed an excellent NO x removal efficiency at 200 and 250℃. However, the NO x reduction efficiencies were always much lower than the removal efficiency. Most of the removed NO x was simply passed from the flue gas to the reducing gas. It is very important to feed great excess CO in the reduction zone, since CO tended to be firstly consumed by residue oxygen in the reduction zone and then be involved in the NO+CO reaction. In an in situ DRIFTs study of the dynamic NO x adsorptionreduction process, it was found that poor reduction and desorption behavior of the store nitrates was the bottleneck of the NO x adsorption-reduction process.

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The influence of CO2, H2O and SO2 on the NO reduction by CO over Fe/Co activated semi-coke catalyst was investigated in a simulated rotary reactor.

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