The reactions catalyzed by ZSM-5 depend on the
aging of the ZSM-5 additive. When ZSM-5 is fresh,
the cracking activity is higher than it is in an indus-trial FCC unit. Fresh ZSM-5 is able to convert paraf-finswhile the main reactions occurring on deactivated
or steamed ZSM-5 are cracking and isomerization of
olefins[3,22,31,34]
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