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StART® Catalyst System
The StART Catalyst System (Silicon tolerance by ART) has been designed for maximizing cycle lengths in silicon contaminated coker naphtha hydrotreaters.

ART introduced the StART Catalyst System in 2002 as a way for refiners to extend the cycle length of their naphtha treaters while at the same time facing increased incidence of Si  contamination.   This technology combines a state of the art silica guard material, AT724G, along with the active HDS and HDN catalyst AT535.   The StART technology has been widely accepted in the industry for the combination of high Si capacity and high activity in naphtha service.