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Note: Two-Enthalpy Feed for Distillation with Vapor Feed and Refrigerated Condenser

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The use of two-enthalpy feed, which involves splitting the feed, condensing part of it, and sending both the liquid and vapor streams to the distillation column, is explored for columns that have a vapor feed and require refrigeration in the column condenser. The use of two-enthalpy feed can reduce both capital and operating costs compared to condensing all the feed. Compared to use of partial cooling and use of a two-phase feed, two-enthalpy feed reduces the condenser heat duty, but the feed cooling occurs at a lower temperature.

Keywords: Distillation; refrigeration; two-enthalpy-feed

Document Type: Research Article


Affiliations: School of Chemical Engineering, Purdue University, West Lafayette, IN, USA

Publication date: January 1, 2009

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