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Modeling of copolymer solubility in supercritical CO2 for the development of environmental-friendly cleaning processes

Subject Area Technical Thermodynamics
Term from 2007 to 2011
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 46445133
 
CO2 is an environment-friendly solvent that can be used as a substitute for classical solvents (aqueous or organic). However, the design of a new cleaning process using supercritical CO2 may require the addition of surfactants. The aim of these additives is to increase the solvent power of CO2 which is a non-polar molecule and thus a poor solvent for any polar contamination that is generally encountered in industrial facilities, such as metals, metal oxides or organo-metallic compounds. Surfactants studied in this work are fluorinated siloxane polymers and hydrocarbonated copolymers. Whereas fluorinated molecules exhibit a better compatibility with supercritical CO2, purely hydrocarbonated molecules show a perfect compatibility with existing ultimate waste-treatment facilities. The final goal is to establish a reliable methodology for the process design in terms of surfactants properties and CCb-efficiency. The project will be carried out in cooperation with two research groups from France. The first group will perform experimental solubility measurements of surfactants in supercritical CO2 - These data will be modeled in Dortmund. The second group will use the results of the first two groups for the development of an industrial cleaning process.
DFG Programme Research Grants
International Connection France
Participating Persons Bruno Fournel; Patrick Lacroix-Desmazes
 
 

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