GOAL™
Catalyst Series - Technology Summary
The GOAL
series of catalysts addresses the need
to reduce olefins in FCC gasoline. GOAL catalysts combine the
unique CSX zeolite with Grace Davison's proprietary SAM-700 (Selective
Active Matrix) technology. CSX
zeolite has higher activity retention compared with REUSY and
CSSN zeolites, especially at very high vanadium levels
(V>5000ppm). Vanadium tolerance is important to minimise
gasoline olefins since deactivation of the zeolite by vanadium
leads to a decrease in acid site density and activity. This
leads to an increase in selectivity to olefins. A
key feature that differentiates this new zeolite from any other
is the ability to substantially extend its hydrogen transfer
activity with no loss in stability (activity retention) or
increase in coke selectivity. The
new SAM-700 matrix combines moderate matrix activity with
excellent metals tolerance to provide good coke-selective
bottoms upgrading while minimising the amount of olefins
generated through excessive matrix cracking and dehydrogenation
reactions by contaminant metals. GOAL
catalyst technology is being used successfully to reduce olefins
in FCC gasoline by more than 20% versus REUSY based catalysts.
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