Delayed Coking

Delayed coking pilot plant services.

Delayed coking converts unconventional and heavier conventional resource fractions into coker gas oil streams for upgrading in fluid catalytic crackers and hydrocrackers. Delayed coking production is semi-continuously or in batch production. The Intertek PARC pilot plant facility conducts delayed coking processing and laboratory testing for clients.

In semi-continuous operation the feedstock, pumped through heaters and into the coker drum, accumulates in the drum, where it undergoes thermal cracking.  The products leave overhead as gas; the coke remains in the drum and is removed at the end of the run. The end point of the coker distillates is set by the coker drum pressure and coker drum top temperature.  Intertek PARC has two delayed coker pilot plants which have been used to make sponge or needle coke. Pilot Plant P-2 with three coker drums - either 22 or 80 liters in volume - can be operated in once-through mode at a feed rate from 1-3 gph. Pilot Plant P-3 with one 5-liter coker drum is operated in once-through mode at a feed rate from 800 to 1600 cc/hr. Gas analysis is done hourly by an on-line process GC.

In delayed coking batch operations, a known weight of feedstock is charged to the coker drum and heated to temperature with coker gas, naphtha and distillates, leaving the overhead as gas.  Pilot plant P-3 can be operated in the batch mode. The advantage of batch coking is that screening can be done on limited amount of feedstock to obtain initial product properties. PARC’s coke drum in batch operation will handle 1000-2000 gr. The gas is collected in gas bags over 2-hr or 4-hr periods and subsequently analyzed by GC.
 

Contact us to see how Intertek can help your organization with Delayed Coking.