Experimental spectroscopic high-temperature high-pressure techniques for studying liquid and supercritical fluids

Gorbaty, Yuri E.; Бондаренко, Г. В.; Venardou, Eleni; Barlow, Stephen; García‐Verdugo, Eduardo; Poliakoff, Martyn

doi:10.1016/j.vibspec.2003.12.002

Cited by 13 publications

(12 citation statements)

References 26 publications

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“…Infrared (IR) spectroscopy has been an important analytical technique for studying the properties and various applications of SCFs, such as hydrogen bonding, 21,22 chemical reactions, 23,24 high-pressure phase equilibrium, etc. In particular, Schneider and his co-workers developed a high-pressure IR cell for measuring the vapor-liquid equilibrium of CO 2 mixtures at temperature up to 150 8C and pressure to up 200 MPa.…”

Section: Introductionmentioning

confidence: 99%

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

Novitskiy¹,

Ke²,

Çomak³

et al. 2011

Appl Spectrosc

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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 °C and pressure up to 10 MPa.

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Section: Introductionmentioning

confidence: 99%

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

Novitskiy¹,

Ke²,

Çomak³

et al. 2011

Appl Spectrosc

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“…[4][5][6] However, due to the high pressure related to the use of CO 2 under supercritical conditions, picking representative samples out the reactor is not simple, so that monitoring the reaction or polymerization kinetics is extremely difficult, laborious and time consuming. [15,16] For instance, Ben-amotz et al used a specifically designed cell for collecting the scattered light at 1808 of the incident laser beam whereas other groups directly introduced optical fibres in the cell for laser irradiation and collection of the scattered light 17 . Spectroscopic methods such as UV, infrared and Raman spectroscopy are ideal analytical tools for answering this demand.…”

mentioning

confidence: 99%

“…Examples of optical cells designed for performing Raman spectroscopy are discussed in Kazarian's and Poliakoff's reviews. [15,16] For instance, Ben-amotz et al used a specifically designed cell for collecting the scattered light at 1808 of the incident laser beam whereas other groups directly introduced optical fibres in the cell for laser irradiation and collection of the scattered light 17 . Saitow et al reported on the use of a home-made optical view cell for recording Raman spectra of cis-and trans-C 2 H 2 Cl 2 in supercritical fluids.…”

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confidence: 99%

Online Monitoring of Heterogeneous Polymerizations in Supercritical Carbon Dioxide by Raman Spectroscopy

et al. 2012

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“…, 1996;Gorbaty and Bondarenko, 1999;Tassaing et al, 2002;Gorbaty et al, 2004;Zhang and Hu, 2004) ( , 1997;Ikushima et al, 1998;Kawamoto et al, 2004;Okada et al, 2005) (2003) (2000) (2002) Meer et al, (2005) nm OH 9 3 5 6 (Koga et al, 1998) OH (Frantz, 1998;Masuda et al, 2003;Nickolov et al, 2003;Li et al, 2004;Nickolov and Miller, 2005) (HDF Hydrothermally Derived Fracturing) HDF (Hirano et al, 2002) (Hirano et al, 2003) 900 C 2 5 GPa (2000) …”

mentioning

confidence: 99%

“…(BX51, ( 2000;Tassaing et al, 2002;Masuda et al, 2003;Nickolov, 2003;Gorbaty, 2004) (100 C 400 C) Figure 5 100 C 400 C (Thompson, 1965…”

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confidence: 99%

IR and Raman spectroscopic measurements of water at high temperatures and pressures

Abe¹,

Hirano²,

Tsuchiya³

2006

Japanese Magazine of Mineralogical and Petrological Sciences

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High temperature pressure cell for micro IR and Raman spectroscopy have been developed to investigate molecular structure of water under sub and supercritical conditions. The maximum temperature and pressure of the cell were 400 C and 50 MPa, and artificial yellow diamond was installed as a transparent window of the cell. In case of micro IR spectroscopic measurement, incident beam was illuminated to the high temperature pressure cell using the Cassegrainian mirror, and reflected light was analyzed by FTIR system. In case of micro Raman spectroscopic measurement, an incident laser beam (Nd:YAG laser: 532 nm) was irradiated into the cell through standard optical lens. As a result of infrared spectroscopic measurements of water, the broad peak around 3360 cm 1 of infrared spectra, attributed to OH stretching vibration mode of water molecular, was observed at room temperature and pressure. The peak position shifted to higher wavenumber with increasing temperature and shifted to lower wavenumber with increasing pressure. Continuous shift of the OH stretching vibration mode of water molecule was detected by using newly designed high temperature pressure cell. The peak position and behavior of peak shift of interfacial water were affected by substrate. In case of interfacial water on artificial quartz, the peak position shifted to higher wavenumber with increasing temperature, however no obvious change was observed with as a function of pressure.It was possible to measure IR and Raman spectra under supercritical condition by using high temperature pressure cell, and characteristics of molecular structure of interfacial water revealed by IR spectra was changed by environmental conditions such as temperature, pressure and substrate.

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Experimental spectroscopic high-temperature high-pressure techniques for studying liquid and supercritical fluids

Cited by 13 publications

References 26 publications

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

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

Online Monitoring of Heterogeneous Polymerizations in Supercritical Carbon Dioxide by Raman Spectroscopy

IR and Raman spectroscopic measurements of water at high temperatures and pressures

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