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Hysteresis phenomena in sulfur dioxide oxidation over supported vanadium catalysts |
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| Authors: | S G Masters K M Eriksen R Fehrmann |
| Institution: | Department of Chemistry, Building 207, Technical University of Denmark, DK-2800, Lyngby, Denmark |
| Abstract: | Catalyst deactivation and hysteresis behavior in industrial SO2-oxidation catalysts have been studied in the temperature region 350–480°C by combined in situ EPR spectroscopy and catalytic activity measurements. The feed gas compositions simulated sulfuric acid synthesis gas and wet/dry deNOx'ed flue gas. The vanadium (IV) compound K4(VO)3(SO4)5 precipitated during all the investigated conditions hence causing catalyst deactivation. Hysteresis behavior of both the catalytic activity and the V(IV) content was observed during reheating. |
| Keywords: | Vanadium based SLP catalysts Hysteresis Deactivation SO2 oxidation Flue gas desulfurization |
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