SO2Poisoning Behaviors of Ca-Mn/TiO2Catalysts for Selective Catalytic Reduction of NO with NH3at Low Temperature
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The sulfur tolerance of Ca modifiedMnOx/TiO2catalysts in low-temperature SCR process was investigated. Experimental results revealed that the durability of developed catalysts in the presence of SO2could be improved by Ca modification. After being subjected to a range of analytical techniques, it was found that the surface Ca species could act as a SO2trap by preferentially reacting with SO2to form bulk-like CaSO4, inhibiting the sulfation of active phase. Furthermore, the introduction of SO2had also preserved part of Lewis sites over theMnOx.Both of these are conducive to NH3adsorption and activation at low temperature, hence improving the sulfur tolerance of Ca doped catalysts.
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2019 ◽
Vol 546
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pp. 152-162
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2004 ◽
Vol 6
(2)
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pp. 453-464
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2012 ◽
Vol 27
(5)
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pp. 495-500
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2013 ◽
Vol 22
(4)
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pp. 617-623
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