A Modified Golden Gate Attenuated Total Reflection (ATR) Cell for Monitoring Phase Transitions in Multicomponent Fluids at High Temperatures

作者：Novitskiy Alexander A; Ke Jie; Comak Gurbuz; Poliakoff Martyn^*; George Michael W

来源：Applied Spectroscopy, 2011, 65(8): 885-891.

DOI：10.1366/10-06070

• Supercritical fluids
• Phase behavior
• Vapor-liquid transition
• Attenuated total reflection
• ATR
• Fourier transform infrared spectroscopy
• FT-IR spectroscopy

A new continuous flow method using attenuated total reflection infrared (ATR-IR) spectroscopy has been developed for monitoring phase transitions in multicomponent fluids at high pressures and temperatures. Our approach uses Fourier transform infrared (FT-IR) and a modified Golden Gate attenuated total reflection (ATR) cell and exploits the fact that the absorbance of a vapor is much lower than that of the corresponding liquid to monitor the phase transition between vapor and liquid. We demonstrate that this method can provide quantitative measurements on both the dew point and the bubble point. We have validated our approach using three single-component systems (EtOH, MeOH, and H(2)O) and a binary system of EtOH + H(2)O, monitoring phase transitions at temperature up to 300 degrees C and pressure up to 10 MPa.

• 出版日期2011-8