fixed-bed operation

fixed-bed operation

[′fikst ‚bed ‚äp·ə′rā·shən]
(chemical engineering)
An operation in which the additive material (catalyst, absorbent, filter media, ion-exchange resin) remains stationary in the chemical reactor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.