cyclic fixed-bed system

cyclic fixed-bed system
A process were the feed and conditions in a catalytic reactor are changed regularly in an alternating fashion. The most common example is where the reaction deposits coke; feed is passed through the bed continuously until the activity falls to a low level; then the bed is purged of hydrocarbon feed and heated under air or oxygen to remove the coke. Finally the bed is purged of oxygen, and feed is once again introduced. See: fixed-bed catalyst.

Petroleum refining glossary. 2013.

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