Brine rejection and hydrate formation upon freezing of NaCl aqueous solutions
نویسندگان
چکیده
منابع مشابه
Brine rejection from freezing salt solutions: a molecular dynamics study.
The atmospherically and technologically very important process of brine rejection from freezing salt solutions is investigated with atomic resolution using molecular dynamics simulations. The present calculations allow us to follow the motion of each water molecule and salt ion and to propose a microscopic mechanism of brine rejection, in which a fluctuation (reduction) of the ion density in th...
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Using differential scanning calorimetry, we show that the addition of solute(s) to emulsified water lowers the freezing temperature to <231 K, the homogeneous nucleation temperature of pure bulk water, or even completely suppresses freezing. In the latter case, freezing upon warming occurs above T(X) ≈ 150 K and leads to a phase separation into pure ice and a freeze-concentrated solution (FCS) ...
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The freezing of aqueous solutions and reciprocal distribution of ice and a freeze-concentrated solution (FCS) are poorly understood in spite of their importance in fields ranging from biotechnology and life sciences to geophysics and climate change. Using an optical cryo-microscope and differential scanning calorimetry, we demonstrate that upon cooling of citric acid and sucrose solutions a fas...
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The understanding of aqueous solution properties is recognized as being important in many areas of physical chemistry and molecular biophysics. Computer simulation has become an important tool in understanding the structure and dynamics of aqueous electrolyte solutions at the atomic or molecular level. Many works of molecular dynamics (MD) simulations have been carried out to investigate hydrat...
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In this work the effect of electrolytes on hydrate formation was investigated. To do so, a new model was used in predicting the hydrate formation conditions in presence of both single and mixed electrolyte solutions. The new model is based on the van der Waals - Platteeuw hydrate equation of state. In order to evaluate the values for the activity of water in electrolyte solutions t...
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ژورنال
عنوان ژورنال: Physical Chemistry Chemical Physics
سال: 2020
ISSN: 1463-9076,1463-9084
DOI: 10.1039/c9cp05436g