Raman Spectroscopic Study of the Effect of Aqueous Salt Solutions on the Inhibition of Carbon Dioxide Gas Hydrates

Journal article


Publication Details

Author(s): Holzammer C, Braeuer AS
Journal: Journal of Physical Chemistry B
Publication year: 2019
Volume: 123
Journal issue: 10
Pages range: 2354-2361
ISSN: 1520-6106
eISSN: 1520-5207


Abstract

We present an experimental Raman study on the thermodynamic inhibition effect of different salts (NaCl, KCl, MgCl2, and CaCl2 from 2.5 to 11 wt %) on the formation of carbon dioxide gas hydrates. We performed the experiments in a high-pressure vessel with two phases: a water-rich phase and a CO2 -rich phase. We investigated the changes the inhibitors induce in the water-rich phase before the onset of hydrate formation. This includes a study of the change in molar reaction enthalpy between strongly and weakly hydrogen-bonded water and the decrease in solubility of carbon dioxide in water. Additionally, the growth mechanisms of carbon dioxide hydrates were investigated by determining the amount of solid hydrates formed and the reaction constant. The results show that the molar reaction enthalpy, the solubility of CO2 , and the amount of solid hydrates formed can be correlated with the effective mole fraction, whereas the reaction constant is not affected by the addition of salts. The decrease of the molar reaction enthalpy can be directly correlated with the equilibrium temperature of the gas hydrates.


FAU Authors / FAU Editors

Holzammer, Christine
Erlangen Graduate School in Advanced Optical Technologies


External institutions
Technische Universität Bergakademie Freiberg


How to cite

APA:
Holzammer, C., & Braeuer, A.S. (2019). Raman Spectroscopic Study of the Effect of Aqueous Salt Solutions on the Inhibition of Carbon Dioxide Gas Hydrates. Journal of Physical Chemistry B, 123(10), 2354-2361. https://dx.doi.org/10.1021/acs.jpcb.8b11040

MLA:
Holzammer, Christine, and Andreas S. Braeuer. "Raman Spectroscopic Study of the Effect of Aqueous Salt Solutions on the Inhibition of Carbon Dioxide Gas Hydrates." Journal of Physical Chemistry B 123.10 (2019): 2354-2361.

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Last updated on 2019-02-04 at 15:23