Static mixers as heat exchangers in supercritical fluid extraction

P. C. Simões, B. Afonso, João B. Fernandes, J. P. B. Mota

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The performance of a static mixer as a heating device for supercritical CO2 flow was studied and compared with conventional tube-and-tube heat exchangers. The temperature increase experienced by the supercritical CO2 flow varied between 10 and 35 K. The heat fluxes obtained with the static mixer were one order of magnitude higher than the ones observed with a tube-in-tube heat exchanger for the same set of operating conditions. The heat transfer enhancement was caused by the cross-sectional mixing of the fluid and to a lesser extent by conduction across the metallic mixing elements. Heat transfer was also affected by temperature-induced variation of physical properties, especially in the pseudocritical region of the fluid, as well as by buoyancy effects. This is an abstract of a paper presented at the 2007 AIChE Annual Meeting (Salt Lake City, UT 11/4-9/2007).

Original languageEnglish
Title of host publication2007 AIChE Annual Meeting
Number of pages1
Publication statusPublished - 2007
Event2007 AIChE Annual Meeting - Salt Lake City, UT, United States
Duration: 4 Nov 20079 Nov 2007

Conference

Conference2007 AIChE Annual Meeting
CountryUnited States
CitySalt Lake City, UT
Period4/11/079/11/07

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