INA Successfully Starts Up New Delayed Coker Unit (DCU) at the Rijeka Refinery
09/24/2026 • Customer news
The Rijeka Refinery Upgrade Project has reached another major milestone. Following the successful achievement of Mechanical Completion and commissioning, the new Delayed Coker Unit (DCU) has successfully achieved start-up.
Following the transfer of operational responsibility to INA, feedstock was introduced into the unit on 1 September 2026, marking the beginning of production. Since then, the unit has been operating continuously, reaching approximately 70% of its design capacity. All key products have already been successfully produced at required quality, confirming the successful start-up.
With the start-up of the Delayed Coker Unit, the refinery is now capable of processing heavy residues into higher-value products. The same amount of crude oil is expected to yield up to 30% more diesel. The refinery can now process heavier grades, which makes crude sourcing far more flexible, broadening the pool of potential suppliers. The unit also entirely eliminates the need to import vacuum gas oil (VGO). With this major investment, INA and MOL Group have delivered a project that makes crude processing significantly more flexible, further reinforcing supply security for INA and the wider region.
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