Catalytic Oxidation of NO on Activated Semi-Cokes: Effects of the Operation Parameters

To study the effect of the operation parameters on the de-NOx catalysts prepared by Erdos semi-cokes, the vapor content, O₂ content, reaction temperature, space velocity, the concentrations of NO and SO₂ were investigated to find the optimum operating conditions. The addictives loaded on the catalysts could reduce the vapor´s negative effect. The optimal reaction condition is vapor 4.2%, reaction temperature 70°C, space velocity 1000h^-1, O₂ 10%, NO below 1000ppm. T_B was 22h in the optimal condition when less than 70% conversion as the breakthrough point. Because of the suppression of NO oxidation by SO₂, the desulfurization process had to place in front of the process of catalytic oxidation de-NO_x.