Effect of a catalyst on the kinetics of reduction of celestite (SrSO4) by active charcoal

Reduction of celestite (SrSO4) powder with particles of active charcoal has been studied extensively in the absence and presence of catalysts. The opt imum temperature at the charging zone has been optimized to get a maximum w ater-soluble strontium sulfide value. The strontium value has been analyzed using a chemical method, which was verified by the instrumental method usi ng an inductively coupled plasma-optical emission spectrophotometer (ICP-OE S). The conversion-time data have been analyzed by using a modified volume- reaction (MVR) model, and the effect of the catalyst on kinetic parameters has been elucidated. It was found that potassium carbonate, potassium dichr omate, sodium carbonate, and sodium dichromate catalysts were found to enha nce the reaction rate quite satisfactorily in the reduction of the celestit e (SrSO4).