Abstract
The Keggin, K 3PW 12O 40 compound was found to be active as a catalyst in oxidative dehydrogenation of propane. The reaction was conducted at 1 atm, 450–550°C, for a feed flow of 75 cm 3/min (propane 20 cm 3/min; oxygen 5 cm 3/min; and the rest helium). At 450°C the activity was low (1.4% conversion and 52% olefins — propene and ethene — selectivity) while at 550°C the performance was improved (43% conversion and 71% olefins selectivity). The effects of partial pressures of both propane, P P (0.06–0.53 atm) and oxygen, P O (0.06–0.33 atm) on the performance of the catalyst were also investigated. A maximum olefins yield of 31% was obtained at 500°C, P P of 0.53 atm and P O of 0.13 atm.
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