In the petroleum coking process, what is the length of time to heat the coke drum sufficiently to safely introduce hot hydrocarbons, transform the raw material into solid petroleum coke, and remove the solid coke from the drum before repeating the process?

In the petroleum coking process, what is the length of time to heat the coke drum sufficiently to safely introduce hot hydrocarbons, transform the raw material into solid petroleum coke, and remove the solid coke from the drum before repeating the process?

• A. Coke Cycle
• B. Heating Cycle
• C. Drum Cycle
• D. Processing Cycle

Answer: (C)

In delayed coking, one coke drum goes through a complete, repeating run from the moment heating begins until the coke is removed and the drum is ready to be charged again. The length of that run is called the drum cycle. It includes heating the drum to a temperature suitable for safely introducing hot hydrocarbons, allowing the feed to crack and form solid petroleum coke inside the drum, and then removing the coke so the drum can be reused. This full sequence defines one drum cycle, which is why it best matches the described timeframe. Other terms either name only a portion of the process (like heating) or are too generic to describe the per-drum, repeating operation. In practice, a drum cycle spans many hours, typically on the order of a day, depending on feed and plant design.

In delayed coking, one coke drum goes through a complete, repeating run from the moment heating begins until the coke is removed and the drum is ready to be charged again. The length of that run is called the drum cycle. It includes heating the drum to a temperature suitable for safely introducing hot hydrocarbons, allowing the feed to crack and form solid petroleum coke inside the drum, and then removing the coke so the drum can be reused. This full sequence defines one drum cycle, which is why it best matches the described timeframe. Other terms either name only a portion of the process (like heating) or are too generic to describe the per-drum, repeating operation. In practice, a drum cycle spans many hours, typically on the order of a day, depending on feed and plant design.