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Separation Process Engineering: Includes Mass Transfer Analysis, Fourth Edition by Phillip C. Wankat

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Chapter 12. Absorption and Stripping

Thus far, we have talked almost entirely about distillation. There are other unit operations that are very useful in processing chemicals and pollution control. Absorption is a unit operation in which one or more components of a gas stream are removed by being taken up (absorbed) in a nonvolatile liquid (solvent). Liquid solvent must be added as a separating agent. Absorption is one method used to remove CO2 from natural gas and flue gases so that CO2 is not added to the atmosphere where it is probably one cause of climate change (Socolow, 2005).

Stripping is the opposite of absorption. In stripping, one or more components of a liquid stream are removed by being vaporized into an insoluble gas stream. In this ...

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