# Question

The following observed rate data have been reported for Pt-catalyzed oxidation of SO2 at 763K obtained in a differential fixed-bed reactor at atmospheric pressure and containing a catalyst with a bed density of 0:8g cm–3 [2]. The catalyst pellets were 3.2 by 3.2 mm cylinders, and the Pt was superficially deposited upon the external surface. If the void volume of the catalyst bed is 1/2, the density of the catalyst itself will be 1:6g cm–3.

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