Effect of Nitrogen Dioxide on the Measurement of Sulfur Dioxide Concentration with the Lead Peroxide Method

Abstract

For the precise evaluation of SO₂ concentration measured with the lead peroxide method, the effect of nitrogen dioxide on the method is studied experimentally. The experiment has been carried out with a cylindrical PbO₂ pellet and SO₂-NO₂-N₂ gas mixture. The selectivity to produce the solid product and the transfer mechanism for gaseous reactant in the porous solid are discussed according to the dataobtained in this experiment.