The Effect of Methanol Addition to Urea Solution for the Freezing Point Depression on the Performance of SCR Catalyst

Abstract

This paper describes the effect of methanol addition to urea solution for the freezing point depression on the performance of SCR catalyst. In experiments, the effect of methanol addition to urea solution on the NOx reduction performance of SCR catalyst was investigated by using a small-scale catalytic reactor with a simulated exhaust gas. The results show that NOx conversion rate is deteriorated by adding methanol to a reductant even if the mass content of urea in a solution is kept constant.