In this presentation, we intent to introduce our recent study on the selective conversion of the olefins in FCC gasoline into propylene and aromatics with modified nano-sized HZSM-5 zeolite.The reaction was carried out on fixed bed micro-reactor.The characterizations show that, the hydrothermal stability of the virginal nano-sized HZSM-5 zeolitic stucture after steaming at 800? is much lower than the micro-sized counterpart (Ref.)However, there is no obvious difference between the steamed nano-sized zeolite  and micro-sized zeolite (Ref.) in term of the acidity.  The modification of the nano-sized zeolite with La, P, Si and Ba exhibits different functions. P and La favors the reservation of the zeolitic crystallinity and acidity during the 800? hydrothermal treatment. Si is a selective scavenging agent for external surface acidity (TEOS as the precursor of Si). Ba mainly reduces the total acidity of the ZSM-5 zeolite, it is effective for both inner and external surface treatment. Some other important information was also got in this study.

Selective cracking of full range FCC gasoline over modified nanosized HZSM-5 zeolite

245th National Meeting (2013)

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