Abstract
Interstage back mixing is encountered as entrainment in many distillation columns. Bidirectional back mixing is common in liquid-liquid extraction. These effects, which reduce the effectiveness of a separation process, may interfere with its operation even to the extent of shutdown. The design engineer and process operator need to recognize the effects of back mixing and must quantify them to take effective countermeasures. A procedure is developed which describes the effects of interstage bidirectional back mixing in multistage separations. It is implemented on an existing simulation for multicomponent distillation and is used to show the effect of back mixing on product purity as well as on the temperature and bulk flow profiles within the column. These profiles are compared with profiles generated by the specification of nonequilibrium stages to obtain the same product purity. The designer may then identify back mixing and nonequilibrium effects independently and allow for them quantitatively in his design. © 1978, American Chemical Society. All rights reserved.
Recommended Citation
G. D. Loud and R. C. Waggoner, "The Effects Of Interstage Backmixing On The Design Of A Multicomponent Distillation Column," Industrial and Engineering Chemistry Process Design and Development, vol. 17, no. 2, pp. 149 - 156, American Chemical Society, Jan 1978.
The definitive version is available at https://doi.org/10.1021/i260066a007
Department(s)
Chemical and Biochemical Engineering
International Standard Serial Number (ISSN)
0196-4305
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 American Chemical Society, All rights reserved.
Publication Date
01 Jan 1978
