Solubility of 2,4‐dichlorotoluene in water determined in fused silica capillary reactor by <i>in situ</i> Raman spectroscopy

Pan, Zhiyan; Ma, Yanpei; Chou, I‐Ming

doi:10.1002/aic.14163

Cited by 11 publications

(2 citation statements)

References 34 publications

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“…Then, the FSCR was loaded into the heating/cooling stage (INS0908051, INSTEC, USA); the sample temperature was increased at a rate of 5 °C/min from room temperature to 240 °C and at 0.1 °C/min above 240 °C, and intermittently kept constant for no less than 2 h during heating until 1,2‐dichlorobenzene was completely dissolved in HCW. The total dissolution process of 1,2‐dichlorobenzene in HCW in the FSCR was observed under a microscope and recorded with a digital camera (TK‐C9501, JVC, Japan), as described previously . To obtain an accurate set of the liquid–liquid equilibrium experimental data for 1,2‐dichlorobenzene in HCW, the heating experiments of the same sample in a FSCR were repeated three times to determine the mean value of the dissolution T with standard deviation.…”

Section: Methodsmentioning

confidence: 99%

“…The total dissolution process of 1,2dichlorobenzene in HCW in the FSCR was observed under a microscope and recorded with a digital camera (TK-C9501, JVC, Japan), as described previously. [12,41,42] To obtain an accurate set of the liquid-liquid equilibrium experimental data for 1,2dichlorobenzene in HCW, the heating experiments of the same sample in a FSCR were repeated three times to determine the mean value of the dissolution T with standard deviation.…”

Section: Experimental Apparatus and Methodsmentioning

confidence: 99%

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In situ Raman spectroscopy investigation of the solubility and dissolution mechanism of 1,2‐dichlorobenzene in hot compressed water in a fused silica capillary reactor

Bei

Chen

Wang

et al. 2017

J Raman Spectroscopy

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Hot compressed water (HCW), with its unique properties, is regarded as a promising solvent for industrial applications. A number of methods to measure the solubility of hydrophobic organic compounds (HOCs) in HCW have been reported. However, these methods were conducted in large‐scale stainless‐steel reactors, and few included an in situ study regarding the dissolution mechanism of HOCs in HCW during the solubility determination process. In this study, a fused silica capillary reactor in combination with Raman spectroscopy was applied to investigate phase changes, determine the solubility, and study the dissolution mechanism of 1,2‐dichlorobenzene in HCW. The total dissolution process of 1,2‐dichlorobenzene in HCW was observed under a microscope, and the images were recorded continuously using a digital camera. Raman spectroscopy was used to confirm the homogeneity of the 1,2‐dichlorobenzene solution during dissolution. The solubility of 1,2‐dichlorobenzene increased from 35.9 to 85.7 mg g−1 in water with increasing temperature from 256.7 to 294.1 °C. Furthermore, the dissolution mechanism of 1,2‐dichlorobenzene in HCW is proposed based on the Raman spectra of 1,2‐dichlorobenzene and water during the dissolution process in the fused silica capillary reactor. The breakage of the fully hydrogen‐bonded (tetrahedral) configuration and the consequent change in the static dielectric constant of water are deemed to be compelling reasons for the high solubility of 1,2‐dichlorobenzene in HCW. Our experimental method exhibits great potential for determining the solubility of HOCs in HCW and for investigating their dissolution behavior and dissolution mechanism at elevated pressure and temperature conditions. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Apparatus and Methodsmentioning

confidence: 99%