✦ LIBER ✦

Effect of inert venting on the stability of autorefrigerated batch reactors

✍ Scribed by W. L. Luyben

Publisher: American Institute of Chemical Engineers
Year: 1972
Tongue: English
Weight: 354 KB
Volume: 18
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690180112

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✦ Synopsis

Removal of the exothermic heat of chemical reactions by autorefrigeration (vaporization of a liquid phase) is frequently used in continuous and batch chemical reactors. The vapor thus generated is usually liquified in a condenser and the condensate returned to the reactor. This paper studies the effects of the formation of an inert gas by-product on the stability and control of batch autorefrigerated reactors.

Stability is shown to be strongly influenced by the production of these inerts because their buildup in the condenser reduces heat removal capacity. Inert buildup can be reduced by venting, but excessive venting results in a loss of not only inerts but also of the volatile components in the system. This leads to higher reactor temperatures, faster reaction rates and instability.

Digital simulation of a numerical example illustrates the effects of various parameters.

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