Experimental study on removing NO from flue gas using microwave irradiation over activated carbon carried catalyst

Nitrogen oxides （NOx） from flue gas can be removed efficiently by activated carbon continuously irradiated by microwave, which, however, needs high temperature and consumes excessive carbon. If catalyst is added into activated carbon, then reaction temperature can be reduced and selectivity of reaction enhanced. The effects on flue gas denitrification by adding different catalysts to microwave reactor were studied in this paper. It was found that the addition of catalyst could reduce the microwave power required by the same removal efficiency obviously; the difference of removal efficiency was different due to different catalysts, and the Cu-based catalyst has more catalytic action efficiency. Reaction temperature decreased by about 200℃ and removal efficiency increased by 25% after adding Cu-based catalyst. In addition, characteristic analysis for activated carbon conducted by X-ray diffraction confirmed that active component of catalyst existed on the surface of activated carbon.