Reduction of NO by CO in a pulsed corona reactor incorporated with CuO catalyst

Reduction of NO by CO in N-2 was experimentally investigated in a wire-in-t ube pulsed corona reactor combined with CuO catalyst. The pulsed corona was produced by applying a positive pulsed high voltage (peak voltage 16-22 kV , pulse frequency 50 pps) to the wire electrode and the catalyst was coated on the surface of the aluminum film, the grounding electrode attached to t he inner surface of the tube. It was demonstrated that NO could be effectiv ely reduced to N-2 under nonthermal plasma produced by pulsed corona discha rge, and the NO2 yield was significantly suppressed with the existence of C O in the gas stream. For the pulsed corona reactor combined with CuO cataly st, the reduction of NO was 10-20% higher and NO2 production was 50% lower than that of without catalyst in the reactor at room temperature, showing t hat CuO catalyst works effectively for the reduction of NO under pulsed cor ona discharge. A complete reduction of 500 ppm NO in a gas stream containin g 1% CO was achieved at about 473 K with a pulse voltage of 18 kV in the re actor combined with CuO catalyst.