Co2-H2o Fugacity Modeling Using Neural Network

Duan and Sun (2003) have designed a theoretical model for carbon dioxide (CO,) solubility in
pure water. This model is valid for solutions !rom 273 to 573K and from 0 to 2000 bar, while in
the other hand, all the parameters presented in the model can be directly calculated without any
iteration, except fugacity coefficient of C02 ( ~c02) which is a function of temperature (T) and
pressure (P). In order to calculate the ~c02, 15 coefficients must be fitted into the equation. Since
the P-T diagram of C02 is divided into 6 regions, different sets of these coefficients need to be
applied for different regions. Hence, there is a need to design a single model to calculate ~c02 for
the whole regions ofP-T diagram which will be done in this project.