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NGL Fractionation Plant Expansion

The Mossmorran NGL Fractionation Plant received natural gas liquids (NGL) from the North Sea Brent field. Distillation is carried out to separate NGL into ethane, propane, butane and natural gasoline. Costain was engaged to provide a solution to enable increased NGL throughput.

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Shell Exploration and Production

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Advisory and Concept Development
Specialist Design
Project Management
Complex Project Delivery



increase in plant capacity

Live Plant Construction

to avoid disruption to existing operation

The solution developed included the use of a 7.5MW propane refrigeration compressor. Costain were extremely well placed to tackle this challenge due to the years of experience in NGL extraction projects carried out worldwide. The consultancy team delivered a solution through continuous optimisation, highly efficient process integration and maximum recovery with minimum power consumption.

Following the development of a conceptual design that fulfilled the client requirements, Costain was awarded a contract for the project management, detailed engineering, procurement and construction management to implement the third NGL fractionation module.

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