In situ visible microscopic study of molten Cs2SO4·V2O5-soot system: Physical interaction, oxidation rate, and data evaluation

In situ visible microscopy has been used to characterise the physical interaction between soot and Cs2SO4·V2O5, a potentially attractive catalyst, under oxidation conditions. Upon heating to its melting point, Cs2SO4·V2O5 shows both mobility and attachment to the soot particle. This creates a liquid catalyst-soot-gas interface that is favourable for the oxidation reaction. Microscope image data can be used to estimate the oxidation rate, which is in good agreement with data obtained from TGA and fixed bed experiments.