(422e) Solubility of Surfactant Templates in Supercritical Carbon Dioxide Solutions
AIChE Annual Meeting
2005
2005 Annual Meeting
Engineering Sciences and Fundamentals
Thermodynamics Under High Pressure
Wednesday, November 2, 2005 - 4:55pm to 5:20pm
Templates are key to development of porous matrices with tailored pore size distribution and orientation. This presentation focuses on high surface area catalyst synthesis. A template that is soluble in supercritical carbon dioxide with or withoud an entrainer can be removed from the porous catalyst once the pore structure is formed. Therefore, solubilities non-ionic surfactants, Triton X-114 and Tergitol 15-S-9, are presented here. The solubility of each compound is determined using a variable volume, visual cell cloud point phase behavior set-up.
Supercritical carbon dioxide plus entrainer (alcohols) is used as the solvent. The results are modeled using PRSV and extended to other experimental condition.
The experimental mixtures range from 93.2 mol% to 97.6 mol% carbon dioxide with Triton X-114 compositions ranging from 1.93 e-4 mol% to 4.56 e-4 mol%. Observed cloud point pressures range from 95.6 bar to 173.1 bar at temperatures ranging from 35oC to 60oC.
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