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Sources say that the hydrotreater at Marathon Galveston Bay Refinery will remain closed until September.

Sources familiar with the plant's operations on Thursday said that a fire-damaged hydrotreater will be closed at Marathon Petroleum Galveston Bay Refinery, Texas until September.

All other units at the 631,000-barrel-per-day (bpd) refinery in Texas City, Texas, are operating at or near full capacity following the June 14 fire at the 400 train hydrotreater, which is part of the 64,000-bpd Residual Hydrotreating Unit (RHU), the sources said.

Sources who refused to identify themselves because the information was not publicly available did not quantify exactly the production impact.

In an email sent Thursday night, Jamal Kheiry, the spokesperson for Marathon, declined to comment on operations at its refinery.

According to the U.S. Energy Information Administration, the Galveston Bay Refinery has the second largest capacity in the United States.

The 400 train is the third of three hydrotreaters that are part of the RHU. It uses hydrogen to remove sulfur in feedstocks, and products derived from them. This helps to meet U.S. Environmental Rules.

The RHU has also a heavy oil unit which uses hydrogen as a boost to the motor fuels feedstocks, which can be squeezed from residual crude. This thick residue is most commonly used to make petroleum coke and asphalt.

Sources said that following the fire, production of the 144,000 bpd gasoline producing fluid catalytic Cracker 3 (FCC-3), was reduced for several days. Reporting by Erwin Seba, Editing by Sandra Maler & Jamie Freed

(source: Reuters)