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Ethylene Recovery from FCCU Offgas

Costain were commissioned by BP Oil to carry out a study investigating the feasibility of recovering valuable hydrocarbons, namely Ethylene, from an FCCU offgas stream.

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BP Oil

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Advisory and Concept Development
Specialist Design
Technology Integration


Techno-economic assessment

to determine feasibility of hydrocarbon recovery

Process selection

of favorable recovery options

Costain developed a concept for high recovery of ethylene, which was fully optimised to recover 98% of C2+. A medium recovery option was also presented to the client for around 82% recovery. The options involved the use of ethylene refrigeration and/or feed compression.

The options were presented to the client along with recommendations and further advice was provided on modifications to the feed gas pre-treatment that could result in substantial cost savings.

Costain consultancy

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