Research progress of vanadium titanium based selective catalytic reduction denitration catalyst with low SO2 oxidation rate
Selective catalytic reduction(SCR)denitration technology is currently the most mainstream technology for controlling nitrogen oxides in flue gas.Commercial SCR catalyst is mainly composed of V2 O5-WO3(MoO3)/TiO2.V2O5 not only has catalytic reduction effect on nitrogen oxides in flue gas,but also can promote the oxidation of SO2,resulting in the formation of ammonium sulfate,which leads to the blockage of catalyst channels,the reduction of active site,the reduction of catalyst activity and the reduction of denitrification efficiency.This article mainly explored the oxidation mechanism and research progress of SO2 in vanadium titanium based SCR catalysts,summarized some main measures to reduce the SO2 oxidation rate of vanadium titanium based SCR catalysts at home and abroad,and analyzed and discussed this issue.
selective catalytic reductiondenitrificationvanadium based catalystSO2 oxidation rate
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