

Determine the stage and reflux requirements: the number of equilibrium stages. Select the type of contacting device: plates or packing. Select the operating conditions: batch or continuous, operating pressure. Specify the degree of separation required: set product specifications. All rights reserved.ĬHAPTER 17 Separation Columns (Distillation, Absorption, and Extraction)ĭistillation Column Design The design of a distillation column can be divided into the following steps: 1. This video can be ordered from FRI at Chemical Engineering Design, Second Edition. FRI has also produced an excellent training video that shows the physical phenomena that occur when a plate column is operated in different hydraulic regimes.
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Fractionation Research’s design manuals will, however, be available to design engineers whose companies are subscribing members of the organization. Since their work is proprietary, it is not published in the open literature and it has not been possible to refer to their methods in this book. (FRI), an organization set up with the resources to carry out experimental work on full-size columns. In recent years, much of the work done to develop reliable design methods for distillation equipment has been carried out by a commercial organization, Fractionation Research, Inc.

A good understanding of methods used for correlating vapor-liquid equilibrium data is essential to the understanding of distillation and other equilibriumstaged processes this subject was covered in Chapter 4. Distillation is probably the most widely used separation process in the chemical and allied industries its applications range from the rectification of alcohol, which has been practiced since antiquity, to the fractionation of crude oil. Only a brief review of the fundamental principles that underlie the design procedures will be given a fuller discussion can be found in Richardson, Harker, and Backhurst (2002), and in other textbooks: King (1980), Hengstebeck (1976), Kister (1992), Doherty and Malone (2001), and Luyben (2006). Though the emphasis is on distillation processes, the basic construction features, and many of the design methods, also apply to other multistage processes, such as stripping, absorption, and extraction.
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