| 摘要 |
Disclosed is a process of simultaneously removing nitrogen oxides and sulfur dioxide from an oxygen-containing exhaust gas. An exhaust gas containing NOx and SO2 is mixed with NH3 and is then introduced as a fluidizing gas into a fluidized bed, which consists of a catalyst for effecting a reduction of NO with NH3 to form N2 and an oxidation of SO2 with O2 to form SO3. The catalyst consists of a carrier and of catalytically active substances consisting of V2O5 and of Fe2O3, FeSO4 and/or Fe2(SO4)3, and alkali sulfates. The SO3 formed by oxidation may be recovered as sulfuric acid or may be combined with a desulfurizing agent, which consists of Na2CO3, MgO, MgCO3, CaO, CaCO3 and/or Ca(OH2). |
