Simultaneous Removal of SO2 and NOx from Flue Gas on NiMgAlO Catalyst in the Presence of O2

Mo Xin Yu; Ming Dong Zheng; Xiao Jun He; Xue Hui Li; Le Fu Wang

doi:10.4028/www.scientific.net/AMR.356-360.335

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Simultaneous Removal of SO₂ and NOx from Flue Gas on NiMgAlO Catalyst in the Presence of O₂

Abstract:

NiMgAlO catalysts were prepared by two methods: coprecipition and impregnation. They were used to simultaneously adsorb SO₂ and NO with O₂ in a fixed bed at atmospheric pressure. Typically the molar composition of the feed gas was 1% SO₂, 0.2% NO and O₂ with ultra-high purity Ar as the diluent. The results showed the catalysts were excellent materials for the simultaneous oxidation adsorption of SO₂ and NOx. The two kinds of catalysts were compared for the SO₂ and NOx adsorption capacity. The NiMgAlO catalyst prepared by coprecipition had better adsorption than impregnation. When NiMgAlO catalysts with 10 wt-% Ni content were calcined at 550°C, adsorption capacity was the largest at 120°C adsorption temperature: 1.392 mmol SO₂ and 0.213 mmol NOx were adsorbed on 1 g catalyst prepared by the coprecipition method. The causes are seen by the XRD, surface area and porous size analysis.