September 2003

Refining Developments

Revitalize stripping operations with structured packing

Poor stripper performance of FCC spent catalyst burns up products and profits. New retrofit methods cut operating cost and increase product yields

Letzsch, W., The Shaw Group

The fluid catalytic cracking unit (FCCU) is a major profit contributor in a refinery. This unit upgrades black oils into higher-value, lighter products. Consequently, refiners are keenly interested in technologies that enhance this unit's performance. FCCU is a complex operation and is composed of several parts - riser system, feed injection, spent-catalyst stripper, etc. For this unit to be profitable, these systems must work together efficiently. Unfortunately, spent-catalyst strippers are often ignored. Traditional fixes to improve stripper operation are expensive and result in multiyear paybacks. However, new techn

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