Abstract
The catalytic properties of microporous and nonporous heteropoly oxometalates and ZSM-5 zeolites prepared in the absence of an organic templating agent have been studied in the cracking of n-hexane at 648, 673 and 698 K. The activities are measured and compared at quasi-steady state and with time-on-stream. The effects of calcination temperature on the cracking activity have also been studied. The dependence of product selectivities on the conversion of n-hexane and on the reaction temperature over ZSM-5 zeolite and (NH 4) 3PW 12O 40 are reported. While the products are similar the selectivities are markedly dependent on the catalyst employed.
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