Abstract
AbstractA novel approach using a semipermeable Teflon AF‐2400 tube‐in‐tube membrane contactor was developed for the measurement of gas solubility in organic solvents. This membrane ensures gas saturation of liquids in continuous flow at a specific pressure and temperature. After liquid decompression, the amount of gas outgassed was measured with a bubble meter and used for solubility calculation. The proposed method was applied to the measurement of oxygen solubility in toluene and benzyl alcohol. Validation experiments were initially performed by comparing the obtained oxygen solubility in toluene with literature data. With higher temperature, the solubility of oxygen in benzyl alcohol was found to increase, indicating that the oxygen‐dissolving process is endothermic. Finally, an empirical correlation of Henry's law constant as a function of temperature was determined.
Highlights
Gas solubility data in organic solvents have a high importance in chemical industry for the design of various unit operations, e.g., separators and reactors, and the solubility of oxygen is probably one of the most essential [1]
Where T is the experiment temperature, V~ O2 is the molar volume of oxygen at STP (22400 mL mol–1); rL is the density of liquid (g mL–1); ML is molar mass of liquid (g mol–1), PO2 is the oxygen pressure, Patm is the atmospheric pressure (1 bar), H is Henry’s law constant at experiment temperature T, H298K is Henry’s law constant at 298 K
The method was validated by measuring oxygen solubility in toluene
Summary
Gas solubility data in organic solvents have a high importance in chemical industry for the design of various unit operations, e.g., separators and reactors, and the solubility of oxygen is probably one of the most essential [1]. The solubility of oxygen in liquid can be experimentally measured with analytical or synthetic methods [2, 3]. Fischer and Wilken [6] determined oxygen solubility in organic solvents by means of a static synthetic method, where the amount of pure components was precisely known and the changes of temperature and pressure during experiments were monitored. Oxidation of alcohols is one of the most fundamental organic transformations and has great importance in chemical synthesis [7,8,9] This type of reactions involves stoichiometric inorganic oxidants (chromium(VI) or permanganate), leading to serious environmental problems [10]. The Teflon AF-2400 tube-in-tube membrane contactor was employed as a novel apparatus for the measurement of gas solubility in liquids, as exemplified by the case of oxygen in toluene and benzyl alcohol
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
