Catalytic Reduction of SO2 and NO by CO on Rare Earth Oxides(Ⅲ)──Simultaneous Reduction by Using CO as Reducing Agent

Abstract

Abstract: Rare earth oxysulfides obtained from the activation of rare earth oxides were effective catalysts for the simultaneous reduction of SO₂ and NO by COto elemental S.The most active catalysts were Sm₂O₂S and Nd₂O₂S, over which a conversion of >95% for both SO₂ and NO was obtained at 475 .Exceptional behavior was observed over CeO₂,which showed a low activity for desulfurization, but a high activity for denitrification.The seperating experimental results showed that GOS was an intermediate not only for the reduction of SO₂ by CO but also for the reduction of NO by CO.Thus, a COSintermediate mechanism was proposed to describe the simultaneous reaction.Based on the mechanism, the difference a-mong the activities of the rare earth oxides was discussed.

Key words: Catalytic reduction, Desulf urization, Denitrification, Rare earth oxide, Rare earth oxysulfide

CLC Number:

O643.3

TrendMD:

WANG Lei, MA Jian-Xin, XIE Min-Ming, ZHANG Yi-Qun, ZHOU Wei . Catalytic Reduction of SO₂ and NO by CO on Rare Earth Oxides(Ⅲ)──Simultaneous Reduction by Using CO as Reducing Agent[J]. Chem. J. Chinese Universities, 2002, 23(5): 897.

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Catalytic Reduction of SO₂ and NO by CO on Rare Earth Oxides(Ⅲ)──Simultaneous Reduction by Using CO as Reducing Agent

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