Nigeria’s refining landscape is entering another defining moment. Africa’s largest refinery, the 650,000 barrels-per-day Dangote Refinery, is preparing for a short but strategic shutdown of its crude distillation unit (CDU), a move that reflects the delicate balance between feedstock availability, operational optimisation and market stability. While the decision may raise eyebrows in a fuel-hungry economy, industry signals suggest supply risks remain firmly contained.
CDU Shutdown Reflects Crude Supply Realities
The planned one-week CDU outage, expected to take place as early as next week, a refinery source told Argus, this follows a noticeable slowdown in crude deliveries to the Lekki-based facility. Shipping and flow data indicate that around 290,000 barrels per day of crude have reached the refinery so far in January, sharply lower than the roughly 440,000 b/d recorded in December.
In refining terms, the CDU is the heart of the plant, separating crude oil into feedstocks for downstream units. A temporary halt therefore points less to distress and more to operational recalibration. With crude inflows easing, running the CDU at reduced efficiency would be economically inefficient. Instead, the refinery appears to be aligning throughput with available barrels while ongoing work continues on secondary processing units.
Maintenance on RFCC Reshapes Gasoline Strategy
At the same time, extensive maintenance work is underway on the residue fluid catalytic cracker (RFCC), the refinery’s primary gasoline-producing unit. The upgrade includes modifications to the combustion riser, designed to lift catalytic cracking efficiency once the unit returns to service.
The RFCC has been offline since December for planned maintenance and is expected back before the end of January, with any slippage unlikely to extend beyond February. In the interim, Dangote has sustained gasoline output by blending components from other units, including the isomerisation, alkylation and reformer units. Notably, utilisation at the alkylation unit has climbed to 40pc, up from 35pc in October, signalling improving operational confidence.
Fuel Supply Stable as Stocks Hit 34-Day High
Crucially, regulators insist the CDU outage will not disrupt domestic petrol supply. The Nigerian Midstream and Downstream Petroleum Regulatory Authority (NMDPRA) says the country is currently sitting on 34 days of gasoline stocks—the highest level since Dangote Refinery commenced operations.
Additional maintenance on the naphtha hydrotreater has also been described as light and short-term, affecting only part of the system, with a restart expected next week. Taken together, these developments underline a refinery still in its optimisation phase rather than one facing systemic setbacks.
For Nigeria’s downstream sector, the message is clear: Dangote Refinery is learning, adjusting and tightening its processes in real time. Short-term shutdowns may make headlines, but in industry terms, they are often the building blocks of long-term stability.
