Technology

The main objective of the Delayed Coking unit is to convert low value Residual Products to Lighter Products of higher value and to produce Petcoke.

In brief, the process heats the Residual Oil from the Vacuum Distillation Unit in a Petroleum Refinery to its thermal cracking temperature in the heat Transfer Tubes of a Furnace. This partially vaporizes the Residual Oil and initiates Cracking of the long chain Hydrocarbon molecules of the Residual Oil into Hydrocarbon Gases, Coker Naphtha, Coker Gas Oil and Petroleum Coke (Petcoke).

The yield of Coke from the Delayed Coking Process ranges from about 18 to 30 weight-% of the Feedstock Residual Oil, depending the composition of the Feedstock and the operating variables.