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Solubility of Air in Crude Oil 1
- Thread starter ChEGATOR
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Air solubility in hydrocarbons is frequently expressed by the Ostwald coefficient, which for air at 273 K is 0.095. This coefficient gives the volume of gas per volume of liquid solvent.
I assume that this is not a constant for every crude, but may give you a "grosso modo" idea of the true value.
Correction formulas for other temperatures can be found, for example, in Stachowiak and Batchelor's Engineering Tribology Tribology Series, 24 (Elsevier).
I assume that this is not a constant for every crude, but may give you a "grosso modo" idea of the true value.
Correction formulas for other temperatures can be found, for example, in Stachowiak and Batchelor's Engineering Tribology Tribology Series, 24 (Elsevier).
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There is no formula here, except for the conversion of the Ostwald coefficient at 273 K, C[sub]0[/sub], to C[sub]T[/sub] at temperature T.
Pressure doesn't play a role since gas solubility is generally proportional to gas pressure, and assuming the ideal gas law applies, pressure effects cancel out. Meaning that 95 L of air per 1000 L of hydrocarbon at 1 atm should be the same at 2 or 3 atm, all measured at 0[sup]o[/sup]C.
According to the reference given above the Ostwald coefficient is evaluated according to ASTM D2779-92(2007). Don't be surprised to find that solubility of air in hydrocarbons may actually increase with temperature to a certain degree.
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