ExxonMobil Shuts Mossmorran: 830,000 T/Y Ethylene Capacity Lost, Threatening 429 Jobs and Supply Chain

Key highlights
  • ExxonMobil's Fife Ethylene Plant closure in February cuts 830,000 t/y ethylene output.
  • Closure risks 429 jobs, with only 50 potential transfers to Fawley, England.
  • Closure follows a $1 billion upgrade need and harsh economic conditions.
  • Seven major EU and UK crackers closed or announced for closure in 18 months.

The planned February closure of ExxonMobil's Fife Ethylene Plant (FEP) at Mossmorran is a catastrophic commercial decision that eliminates 830,000 tonnes per year (t/y) of UK ethylene output. Attributed to the 1$ billion investment needed for upgrades and a harsh economic environment, this failure delivers a massive blow to the UK's industrial base and deepens the crisis across Europe's petrochemical sector.

Labor Loss and Political Abandonment

The closure puts 429 jobs at risk (179 direct staff and 250 contractors) in Fife. The majority face redundancy, as only 50 staff have a potential transfer option requiring a forced, 480-mile relocation to the Fawley complex in England. Unions, including Unite and GMB, accuse ExxonMobil of "cutting and running" despite massive profits, while simultaneously condemning the UK government's refusal to offer financial support—a stance they view as accelerating the exit of vital industries.

Loss of Critical Olefins Supply

The FEP was a steam cracker using light ethane feedstock (from Shell and imported US shale gas via INEOS). Mossmorran joins a trend of at least seven major crackers closed or announced for closure across the EU and UK in less than 18 months, representing a cumulative loss of nearly 5 million tonnes of annual ethylene capacity. This mass rationalization, driven by high domestic energy costs, signals the hollowing out of European manufacturing competitiveness.

Destabilization of Scottish Infrastructure

The closure destabilizes an entire industrial network:

Shell's Supply Gap: The adjacent Shell NGL Plant loses its main customer for ethane, forcing it to find new, urgent—and potentially costly—solutions for off-take, or risk reducing processing, which can impact the wider gas network and exacerbate flaring incidents.

INEOS Pipeline Impaired: The multi-million-pound pipeline that supplied imported US shale gas via INEOS Grangemouth specifically to the FEP has had its future viability severely compromised, highlighting the waste of capital incurred when supported industrial lifelines are suddenly severed.

The Mossmorran FEP closure is a high-profile industrial casualty that highlights the systemic vulnerabilities and accelerating decline across the continent's chemical sector.