Estimation of axial dispersion in individual sections of an airlift-loop reactor

✍ Scribed by P. Verlaan; A.M.M. Van Eijs; J. Tramper; K.Van't Riet; K.Ch.A.M. Luyben

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 855 KB
• Volume: 44
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(89)87013-7

✦ Synopsis

Axial dispersion in the riser, downcomer and gas-disengagement section of an airlift-loop reactor (ALR) with an external loop was estimated and expressed by the Bodenstein number (Bo). In contrast to existing methods, the newly developed procedure yields reliable results for the individual sections. Values of Bo = 3CG40 for the riser, -50 for the downcomer and 10 for the gas-disengagement section show that, except for this last section, the flow behaves like plug flow with superimposed dispersion. Depending on the Bodenstein number, the pertinent ALR is fully mixed within four-seven circulations. This complete mixing time is used as a characteristic time in the presented parameter estimation method.