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1 Polish Journal of Chemical Technology

1 2000

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Influence of preparation method of hematite catalyst precursors on their catalytic activity in dehydrogenation of ethylbenzene to styrene

Kuśtrowski P., Surman J., Chmielarz L., Dziembaj R.

Polish Journal of Chemical Technology

2000

Vol. 2, nr 2

27-30

A series of iron oxide based catalysts modified by introduction of chromium Cr, cerium Ce and potassium (KOH or K2CO3) promoters were prepared by coprecipitation method. KOH or K2C03were used as precipitating agents. Calcined catalyst precursors were characterised by XRD (structure) and low temperature Ar-sorption (specific surface area). Activity and selectivity of modified iron oxides were tested in dehydrogenation of ethylbenzene to styrene in fixed-bed microreactor system. Catalytic activity was influenced not only by introduced promoter (Cr, Ce, K) but also by kind of precipitating agent (KOH, K2CO3). The highest styrene yield was observed for iron oxide catalyst modified with cerium and potassium. All studied catalysts showed high selectivity towards styrene (>94%).