Supercritical Reaction Calorimetry: Versatile Tool for Measuring Heat Transfer Properties and Monitoring Chemical Reactions in Supercritical Fluids
The heat flow reaction calorimetry technique was developed for reactions with supercrit. fluids and was applied to monitor the free-radical dispersion polymn. of Me methacrylate in supercrit. carbon dioxide (scCO2). The main math. equation for the calorimetric calcns. was modified to take into account the particularities linked to the supercrit. nature of the solvent. As a result, important heat transfer variables, such as the overall heat transfer coeff., can be measured at the actual reaction conditions. This information is later used to calc. the heat released by the reaction and thus monitor its evolution. The robustness and accuracy of the technique allowed also investigating the effects of several reaction parameters. Finally, the obtained data were used to illustrate the importance of pressure as far as the safety of the reaction is concerned.
Keywords: Polymerization (monitoring of free-radical dispersion polymn. of Me methacrylate in supercrit. carbon dioxide) ; Calorimetry ; Heat transfer ; Reaction ; Safety ; Supercritical fluids (supercrit. reaction calorimetry for measuring heat transfer properties and monitoring chem. reactions in supercrit. fluids) ; calorimetry heat transfer reaction supercrit fluid ; polymn Me methacrylate supercrit carbon dioxide calorimetry ; Supercritical ; calorimetrie ; fluids
CAN 148:451878, 48-5, Unit Operations and Processes, Institute of Chemical Sciences and Engineering, Group of Chemical and Physical Safety,Ecole Polytechnique Federale de Lausanne,Lausanne,Switz., Journal, 0888-5885, written in English., 80-62-6 (Methyl methacrylate); 124-38-9 (Carbon dioxide) Role: PEP (Physical, engineering or chemical process), PROC (Process) (monitoring of free-radical dispersion polymn. of Me methacrylate in supercrit. carbon dioxide)
Record created on 2009-02-09, modified on 2016-08-08