Search results
Results from the WOW.Com Content Network
It was presented jointly in Portland, Oregon at the Symposium on Thermodynamics and Molecular Structure of Solutions in 1948, as part of the 14th Meeting of the American Chemical Society. [11] The success of the Redlich–Kwong equation in modeling many real gases accurately demonstrate that a cubic, two-parameter equation of state can give ...
In 1972 G. Soave [4] replaced the term of the Redlich–Kwong equation with a function α(T,ω) involving the temperature and the acentric factor (the resulting equation is also known as the Soave–Redlich–Kwong equation of state; SRK EOS).
Critical isotherm for Redlich-Kwong model in comparison to van-der-Waals model and ideal gas (with V 0 =RT c /p c) The Redlich–Kwong equation is another two-parameter equation that is used to model real gases. It is almost always more accurate than the van der Waals equation, and often more accurate than some equations with more than two ...
PSRK is a group-contribution equation of state. This is a class of prediction methods that combines equations of state (mostly cubic) with activity coefficient models based on group contributions, such as UNIFAC. The activity coefficient model is used to adapt the equation-of-state parameters for mixtures by a so-called mixing rule.
His new formula revolutionized the study of equations of state, and was the starting point of cubic equations of state, which most famously continued via the Redlich–Kwong equation of state [7] and the Soave modification of Redlich-Kwong. [8] The van der Waals equation of state can be written as
The most famous functional forms of this category are Redlich-Kwong, [3] Soave-Redlich-Kwong [4] and Peng-Robinson. [5] Although their initial form is empirically suggested, they are categorised as semi-empirical models as their parameters can be adjusted to fit the real experimental measurement data of the target system.
I'm expanding this article for a class. I was going to give a little bit more background to the equation itself, citing Redlich and Kwong's 1949 paper. I'll go into a little bit of their derivation of it. I'm then going to talk about some of the modifications that have been made to the equation over the years.
Almost all subsequent equations of state are derived from the van der Waals equation, like those from Dieterici, [7] Berthelot, [8] Redlich-Kwong, [9] and Peng-Robinson [10] suffer from the singularity introduced by 1/(v - b). Other equations of state, started by Beattie and Bridgeman, [11] are more closely related to virial equations, and show ...