Aspen Tutorial #4: Thermodynamic Methods

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Aspen Tutorial #4: Thermodynamic Methods

Aspen Tutorial #4 33 Figure 1: Aspen Plus Help You can use the right arrow button to page through the Help window’s information on the available thermodynamic methods.

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Aspen Tutorial #4: Thermodynamic Methods

RK-SOAVE (also SRK) Redlich-Kwong-Soave The next group of available property methods is the Activity Coefficient group. This group uses various relationships to calculate the liquid phase activity coefficient and then calculate the vapor fugacity using a second relationship. Some of the most common methods for this group are listed in Table 2.

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A Review of the Equations of State and their Applicability ...

The Redlich Kwong is a cubic equation of state based on the van der Waals equation [5]. It can be applied to mixtures by using mixing rules to the equation of state parameters. It improved the Van der Waals equation with a better description of the attractive term. Redlich and Kwong

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A Property Methods and Calculations

Redlich-Kwong2 (SRK) equations of state. In addition, HYSYS offers several methods which are modifications of these property packages, including PRSV, Zudkevitch Joffee (ZJ) and Kabadi Danner (KD). Lee Kesler Plocker3 (LKP) is an adaptation of the Lee Kesler equation for

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Ecuaciones de Estado - Universidad de Santiago de Chile

4. Redlich-Kwong La ecuación de Redlich-Kwong por Redlich y Kwong (1949) es una modificación de la ecuación de van-der-Waals. Similar a la de van-der-Waals, esta ecuación sólo debe ser usada para determinar las capacidades y limitaciones de una ecuación de estado simple ya que existen mejores ecuaciones de estado.

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Property Package Descriptions

The Sour SRK model combines the Soave Redlich Kwong and Wilson's API-Sour Model and can be be applied to sour water strippers, hydrotreater loops, crude columns, or any process containing hydrocarbons, acid gases, and H2O. This option uses Wilson's model to account for the ionization of the H2S, CO2, and NH3 in the aqueous water phase.

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Calculation of Gas Density and Viscosity

the Redlich Kwong equation will be used for calculation of the compressibility factor of a gas. The Sutherland formula canbe used to calculate the viscosity of a gas at a specified temperature if the Sutherland constant isavailable for the gas. It will be discussed and used in example calculations. Another method for

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(J K - Colby College

Figure 7.5.3: Van der Waals isotherms for CO 2.T c = 30.99 °C. Table 7.5.3: Redlich-Kwong coefficients6 Molecule A (bar L 2 mol-2) A (atm L 2 mol-2) B (L mol-1) Helium 0.07991 0.07886 0.01645 Hydrogen 1.4333 1.4145 0.01848

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Thermodynamic Models & Physical Properties

EOS (and its variations) and the Soave-Redlich-Kwong EOS (and its variations), which belong to the cubic EOS. Other forms of EOS include those derived from statistical thermodynamics such as the Sanchez-Lacombe and SAFT. Another form of the EOS models is the steam tables (provided as a Base model in Aspen Plus).

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