Abstract
The new zeolite ITQ-7 (ISV structure) has been tested as an additive of USY zeolites for gasoil cracking. The dimensions of its tridirectional system of channels, with pores between 6.1 and 6.3 Å and with lower tortuosity than those of the Beta zeolite, favor β-scission versus protolytic cracking and limit the extension of hydrogen transfer reactions. In the catalytic cracking of gasoil, when comparing with Beta zeolite, ITQ-7 produces higher gasoline yield, with lower content of aromatics, more isoamylenes, and higher olefinicity in the LPG fraction.
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