Twu-Sim-Tassone equation of state: Difference between revisions

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Twu, Sim and Tassone presented a cubic equation of state for accurate representation of hydrocarbon that has become known as the '''Twu-Sim-Tassone''' or '''TST equation of state'''<ref>Twu, C.H., et al, "A Versatile Liquid Activity Model for SRK, PR and A New Cubic Equation of State TST." ''Fluid Phase Equilibria'', 194-197, pp. 385-399, (2002)</ref>.  With a critical compressibility factor <math>Z_c</math> of 0.2962, it better represents many the compressibility of than the [[Redlich-Kwong equation of state]], including the Soave modified version, and the [[Peng and Robinson equation of state]] and has been shown to better represent long chain hydrocarbons<ref>Twu, C.H., Sim, W.D., Tassone, V. "Getting a Handle on Advanced Cubic Equation of State." ''Measurement & Control'', pp. 58-65, (2002).</ref>.
Twu, Sim and Tassone presented a cubic equation of state for accurate representation of hydrocarbon that has become known as the '''Twu-Sim-Tassone''' or '''TST equation of state'''<ref>Twu, C.H., et al, "A Versatile Liquid Activity Model for SRK, PR and A New Cubic Equation of State TST." ''Fluid Phase Equilibria'', 194-197, pp. 385-399, (2002)</ref>.  With a critical compressibility factor <math>Z_c</math> of 0.2962, it better represents many the compressibility of than the [[Redlich-Kwong equation of state]], including the Soave modified version, and the [[Peng and Robinson equation of state]].  This allows it to better represent long chain hydrocarbons<ref>Twu, C.H., Sim, W.D., Tassone, V. "Getting a Handle on Advanced Cubic Equation of State." ''Measurement & Control'', pp. 58-65, (2002).</ref>.


The equation follows the general cubic form resulting in the equation:
The equation follows the general cubic form resulting in the equation:

Revision as of 00:38, 5 November 2011

Twu, Sim and Tassone presented a cubic equation of state for accurate representation of hydrocarbon that has become known as the Twu-Sim-Tassone or TST equation of state[1]. With a critical compressibility factor Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle Z_{c}} of 0.2962, it better represents many the compressibility of than the Redlich-Kwong equation of state, including the Soave modified version, and the Peng and Robinson equation of state. This allows it to better represent long chain hydrocarbons[2].

The equation follows the general cubic form resulting in the equation:

Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle p={\frac {RT}{V_{m}-b}}-{\frac {a}{(V_{m}-0.5b)(V_{m}+3b)}}}

Where Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle V_{m}} is the molar volume, and and are the attractive and repulsive parameters akin to those of the Van der Waals equation of state.

References

  1. ↑ Twu, C.H., et al, "A Versatile Liquid Activity Model for SRK, PR and A New Cubic Equation of State TST." Fluid Phase Equilibria, 194-197, pp. 385-399, (2002)
  2. ↑ Twu, C.H., Sim, W.D., Tassone, V. "Getting a Handle on Advanced Cubic Equation of State." Measurement & Control, pp. 58-65, (2002).
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