Automated in Situ Measurement of Gas Solubility in Liquids with a Simple Tube-in-Tube Reactor

作者：Zhang Jisong; Teixeira Andrew R; Zhang Haomiao; Jensen Klavs F

来源：Analytical Chemistry, 2017, 89(16): 8524-8530.

DOI：10.1021/acs.analchem.7b02264

Data on the solubilities of gases in liquids are foundational for assessing a variety of multiphase separations and gas liquid reactions. Taking advantage of the tube-in-tube reactor design built with semipermeable Teflon AF-2400 tubes, liquids can be rapidly saturated without direct contacting of gas and liquid. The gas solubility can be determined by performing steady-state flux balances of both the gas and liquid flowing into the reactor system. Using this type of reactor, a fully automated strategy has been developed for the rapid in situ measurement of gas solubilities in liquids. The developed strategy enables precise gas solubility measurements within 2-5 min compared with 4-5 h using conventional methods. This technique can be extended to the discrete multipoint steady-state and continuous ramped-multipoint data acquisition methods. The accuracy of this method has been validated against several gas liquid systems, showing less than 2% deviation from known values. Finally, this strategy has been extended to measure the temperature dependence of gas solubilities in situ and to estimate the local enthalpy of dissolution across a defined temperature range.

• 出版日期2017-8-15
• 单位MIT