Ethanol Separation from Fermentors by Stripping and Two-Stage Adsorption
A process for separating ethanol from dilute aqueous fermentation media has been studied experimentally in parts. Activated carbon and cellulose were used as adsorbents in a two-stage adsorption scheme suitable for use with fermentation media. The separation system involves the stripping of ethanol from a fermentor with recirculated carbon dioxide on a continuous basis. The ethanol and some water are adsorbed onto activated carbon. A carrier gas is then used for desorption of the adsorbed ethanol and water, and the desorbed vapors are then passed through a cellulose adsorbent to remove water and obtain nearly pure ethanol. The stripping with a two-stage adsorption separation process appears to be technically feasible, but further studies are needed to establish economic feasibility.
P. K. Walsh et al., "Ethanol Separation from Fermentors by Stripping and Two-Stage Adsorption," Fundamentals of Adsorption, Proceedings of the Engineering Foundation Conference, Engineering Foundation Conference, May 1983.
Chemical and Biochemical Engineering
Keywords and Phrases
Adsorption-applications; Carbon - Activated; Chemical Reactions - Fermentation; Yeast
Article - Conference proceedings
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