Ozone Destruction on Powders

The destruction of ozone on silica‐gel, alumina, sodium chloride, calcite, Saharan sand and wood ash as model powders was studied in a fluidized bed reactor. An elevated ambient concentration of ozone (100 ppb) in the filtered air stream was applied during the experiments. The relative effectiveness of ozone destruction was in the order alumina > wood ash > silica‐gel, followed by Saharan sand > calcite > sodium chloride. The implication of this result on ozone measurements in particle‐rich atmospheres is discussed.