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Intermediate Vapor Expansion Distillation and Nested Enrichment Cascade Distillation
Abstract
Although it is known that
incorporating an intermediate reboiler or
reflux condenser in a distillation column
will improve column efficiency by 15 to
100%, there has been little use of this
technique to date." Intermediate vapor
compression heat pumping was recently
introduced as one practical means of
achieving this benefit. Introduced in this
paper are two new means having added
advantages over compression: intermediate
vapor expansion heat pumping, and nested
enrichment cascades. In both cases the
efficiency advantage is obtained without
requiring import of shaft work. With
intermediate vapor expansion, the expander
is more efficient and less costly than the
compressor which achieves comparable
improvement in distillation efficiency.
With the "nested enrichment" technique, the
increased efficiency is obtained without
requiring either compressors or expanders.
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Citation
Erickson, D. C. (1986). Intermediate Vapor Expansion Distillation and Nested Enrichment Cascade Distillation. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /92978.