Combined DeSO_x/DeNO_x Reactions on a Natural Manganese Ore in a Fluidized Bed Reactor

Abstract

Simultaneous removal of SO₂ and NO_x from simulated gas was investigated using a continuously operating fluidized bed reactor with variables of gas velocity, sorbent/catalyst feeding rate, aspect ratio (L/D), temperature, sorbent/catalyst size. NMO (natural manganese ore) was used as a sorbent and catalyst of size from 0.715 mm to 0.194 mm in diameter. Particle size, aspect ratio, and sorbent feeding rate did not affect the reduction of NO_x with ammonia, and NO_x removal efficiency was about 94% at 350°C, gas velocity of 0.204 m/sec, L/D=1.0. SO_x removal efficiency was affected by temperature, gas velocity, sorbent/catalyst feeding rate, aspect ratio and sorbent/catalyst size and it was about 92% at 450°C, gas velocity of 0.204 m/sec, sorbent/catalyst feeding rate of 8.54 g/min, L/D=1.0.