September 2004

Special Report: Refining Developments

Fine-tune your delayed coker: obstacles and objectives

Practical guidelines assist debottlenecking coker operations to increase unit capacity and provide more processing flexibility

Elliott, J. D., Foster Wheeler USA Corp.

Delayed cokers are extensively used to convert heavy residues into lighter products. As the feedslate for refineries becomes heavier and sourer in composition, delayed coking will play a more prominent role in the operations scheme. But are refiners using their delayed cokers to the optimum level? The presented strategies offer guidelines on how to re-evaluate your coker performance and provide options to raise coking efficiencies REASONS FOR COKER REVAMPS There are hundreds of delayed cokers in operation. In nearly all, the refiner targets an optimum performance for the refinery. Yet, new cokers are expensive. This high cost requires maximizing capacity for existing plants fo

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