Supercritical carbondioxide

Keywords Supercritical Water, Supercritical Carbondioxide, Hazardous Organics, Oxidation, Separation... 

SEE has been automated for serial extraction of samples. Fields of applications of SEE with supercritical carbondioxide and additional modifiers have been environmental (sewage sludge [64]) and forensic toxicology (drugs [65, 66]), as well as food and plant analysis [67]. On-line coupling to different analytical methods (IR, NMR, fluorescence detection, MS) has recently been reviewed [68], but most bioanalytical applications are based on the offline extraction with subsequent analysis by GC/MS or LC/MS. 

The third polymer hsted in Fig. 7.4 has a very different structure in comparison with the polyacetylenes. The Teflon AF2400 is a perfluorinated random copolymer composed of 13 mol% tetrafluoroethylene and 87 mol% 2,2-bis(tri-fluoromethyl)-4,5-difluoro-l,3-dioxole. Its extraordinarily high gas permeabiUty was first described by Nemser and Roman [287]. Composite membranes fabricated from this polymer are currently being tested on a pilot scale by Compact Membrane Systems, Wilmington. An attractive application seems to be the production of oxygen-enriched or oxygen-depleted air for mobile diesel engines [288] and the separation of supercritical carbondioxide [289]. 

Ciftci, O. N. and Temelli, F. (2013), Enzymatic conversion of com oil into biodiesel in a batch supercritical carbondioxide reactor and kinetic modeling. The journal of Supercritical Fluids. 75, 172-180. 

The methods of supercritical extraction and of supercritical oxidation in carbondioxide can favourably be integrated in one process if the extracted solute has to be disposed. 

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