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Reaktoro
v2.11.0
A unified framework for modeling chemically reactive systems
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Drummond (1981) activity model
The activity model of Drummond (1981) for a dissolved gas.
In the activity model of Drummond (1981), the activity coefficient of a dissolved gas (e.g., CO2(aq), O2(aq), H2S(aq)) is computed using:
\[\ln\gamma_{i}=\left(a_{1}+a_{2}T+\frac{a_{3}}{T}\right)-(a_{4}+a_{5}T)\frac{I}{I+1},\]
where I is the ionic strength of the aqueous solution (in molal) and T is temperature (in K).
References:
- Drummond, S. E. (1981). Boiling and mixing of hydrothermal fluids: chemical effects on mineral precipitation. Pennsylvania State University.*
