Revamp improves asphalt yield in Georgia refinery

In 2003, Citgo Asphalt Refining Co.'s (CARCO) Savannah, Ga., refinery completed a revamp of its No. 1 crude unit that increased asphalt yield by 2% on whole crude, depending on asphalt grade produced. Asphalt is the main product with all other products sold as refinery intermediate feedstocks.Since the revamp, the unit charge rate has exceeded design rates, energy consumption is lower, less cracked gas is produced, and operating stability has improved greatly. Before the revamp the unit had little flexibility, was difficult to control, and operated with several constraints.Before the revamp, CARCO determined that the crude column had to be replaced because it had reached the end of it...

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