ASPEN PLUS 里面的PSRK方程的混合规则是什么样的？

727034953 · 发表于 1970-1-1 08:00:00

PSRK方程是不是就是SRK方程增加了混合规则？且不管是什么样的而混合规则，只要是SRK方程结合了混合规则得到的都叫PSRK方程啊？ASPEN PLUS 里面的PSRK方程的混合规则是什么样的？

taobinglin · 发表于 1970-1-1 08:00:00

看看热力学吧。

727034953 · 发表于 1970-1-1 08:00:00

taobinglin 发表于 2013-6-18 23:47
看看热力学吧。

看了，我是看过之后没找到答案才提问的，但热力学并不介绍PSRK方程啊，倒是有SRK方程，我知道PSRK的基础是SRK，但怎么由SRK变成PSRK的具体过程我不知道。能指点一下不？

lihuifeng1988 · 发表于 1970-1-1 08:00:00

你可以在帮助文件里面找到这方面的知识，aspen的帮助文件很强大的

tdl522 · 发表于 1970-1-1 08:00:00

PSRK
The PSRK property method is based on the Predictive Soave-Redlich-Kwong
equation-of-state model, which is an extension of the Redlich-Kwong-Soave
equation of state.
Besides the acentric factor, you can use up to three polar parameters to fit
more accurately the vapor pressure of polar compounds. The Holderbaum-
Gmehling mixing rules or PSRK method predict the binary interactions at any
pressure. Using UNIFAC the PSRK method is predictive for any interaction
that can be predicted by UNIFAC at low pressure. The UNIFAC interaction
parameter table has been extended for gases, for the PSRK method.
The minimum parameter requirements of the PSRK property method are
given in the tables labeled Parameters Required for the PSRK Property Method
(see below) and Parameters Required for Flexible and Predictive Models. For
details about the optional parameters, and about calculation of pure
component and mixture properties, see Physical Property Models.
Mixture Types
You can use the PSRK property method for mixtures of non-polar and polar
compounds, in combination with light gases.
Range
You can use the PSRK property method up to high temperatures and
pressures. You can expect accurate predictions at any conditions provided
UNIFAC interaction parameters are available. Results are least accurate close
to the critical point.

tdl522 · 发表于 1970-1-1 08:00:00

Predictive SRK (PSRK)
This model uses the Redlich-Kwong-Soave equation-of-state for pure
compounds. The mixing rules are the predictive Holderbaum rules, or PSRK
method. Several alpha functions can be used in the PSRK equation-of-state
model for a more accurate description of the pure component behavior. The
pure component behavior and parameter requirements are described in
Standard Redlich-Kwong-Soave and in Soave Alpha Functions.
Note: You can choose any of the available alpha functions, but you cannot
define multiple property methods based on this model using different alpha
functions within the same run.
The PSRK method is an example of modified Huron-Vidal mixing rules. A brief
introduction is provided in Huron-Vidal Mixing Rules. For more details, see
Predictive Soave-Redlich-Kwong-Gmehling Mixing Rules.

doding · 发表于 1970-1-1 08:00:00

PSRK : SRK方程 + MHV2混合规则 + UNIFAC

ASPEN PLUS 里面的PSRK方程的混合规则是什么样的？

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