Investigation of CNT and Zn doped Cu-SSZ-13 zeolite catalyst for ammonia selective catalytic reduction activity of NOx

Abstract

Hybrid Cu-SSZ-13 zeolite catalyst are prepared and analyzed for NH3-SCR activity with different topologies in the present investigation. Cu-SSZ-13 was synthesized by ionexchange method, and hybrid Cu-SSZ-13 was synthesized by wet-impregnation method with three different molar ratios between Znx-CNTy as 1:5, 1:10, & 1:15 and maintained as 1:5 mass ratio between Znx-CNTy/Cu-SSZ-13 hybrid zeolite catalysts. The catalytic activity measured at a temperature window of 100˚C to 550˚C concludes hybrid Zn1- CNT10/Cu-SSZ-13 catalyst exhibits high NH3-SCR performance (100%) at a temperature of 180˚C to 475˚C and by anti-sulfur activity, it exhibits 80% NOx at 300˚C for 8hrs in the presence of SO2 gas in feed aid that addition of Zn species and CNTs influence Cu-SSZ13 in NH3-SCR activity finding them to be a better catalyst for NOx reduction.