Maximum and Minimum Catalyst Operating Temperatures

Operating above -690 K ensures that the catalyst is molten and active. 

Operating below -900 K ensures the presence of Reactions 8.1 to 8.4 s active ions in the molten catalyst. Above -900 K, these active ions transform to inactive vanadates (V04 ) causing SO2 oxidation to cease (Rasmussen, 2001). Also, above 900 K, the molten catalyst and solid substrate tend to irreversibly form a viscous inactive liquid. 

Operating below 600 °C ensures the presence of Reactions (8.1) and (8.2) s active ions in the molten catalyst. Temperatures above 600 °C cause  

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