February 2009

Special Report: Clean Fuels

Advances in delayed coking heat transfer equipment

Designs are evolving to meet changing process needs, while improving the onstream factor and extending run-length

The delayed coking process is used to crack heavy oils, normally vacuum residue, into more valuable light liquid products, with less valuable gas and solid coke as byproducts. The first delayed coking plant was built in 1930. While the delayed coking process has been evolving for 78 years, the past few years have seen changes in feedstock that have had a major impact on the design and operation of delayed coking units. These changes are affecting the heat transfer equipment and coker heater in particular. The increasing worldwide demand for liquid petroleum products, the resulting increase in the crude oil price, the differential cost between light and heavy crudes, and the shift toward pr

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