Mass Transfer in Countercurrent Packed Columns: Application to Supercritical CO2 Extraction of Terpenes

Pedro C. Simões, Henrique A. Matos, Paulo J. Carmelo, Edmundo Gomes de Azevedo, Manuel Nunes da Ponte

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Mass transfer in a countercurrent column, filled with structured gauze packing, was measured for the separation of a mixture of terpenes (d-limonene/1,8-cineole) by supercritical carbon dioxide, at 313 and 318 K and pressures up to 9 MPa. The extraction efficiency was determined in terms of the overall mass transfer coefficient, KLa. Operating lines for this process had an appreciable curvature due to a high miscibility of the two contacting phases. The real slope of these lines had to be estimated. Available mass transfer models for packed columns predicted efficiencies diverging to a great extent from the experimental results.

Original languageEnglish
Pages (from-to)613-618
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume34
Issue number2
DOIs
Publication statusPublished - 1 Feb 1995

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