Abstract
The effects of adding paraffin wax to fluid and delayed coking distillates on the yield, microstructure, and physicochemical properties of the cokes were investigated. It was established that by adding optimal amounts of wax to a distillate feed with a high stability factor, the coke yield can be increased by 2.5 to 5.8 percent by weight. The wax should be injected into the feedstock between the furnace and chamber in delayed coking units. The addition of wax to the feed in order to increase the stability factor could be used as a method for reducing tube coking in cracking furnaces.
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