Generalized Equation of State for Gases

Sugie, Hidezumi; Lu, Benjamin C.‐Y.

doi:10.1021/i160035a020

Cited by 14 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This table also includes deviations for several other equations: The generalized BWR of Edmister et al (1968) ; the BWR with the original coefficients (Benedict et al, 1940); Sugie andLu (1970, 1971); Barner and Adler (1970); and BWR44 which will be discussed later. Grand average deviation for BWR24 is 0.48% in the calculated pressure.…”

Section: Discussionmentioning

confidence: 99%

An improved generalized equation of state

Yamada

1973

AIChE Journal

View full text Add to dashboard Cite

Two forms of a generalized Benedict-Webb-Rubin Equation, BWR24 and BWR44, are proposed for dense gases which represent an improvement by a factor of about three in calculated pressures compared to reduced forms of this relationship in the literature. The method is also tested for accuracy in predicting enthalpy departures for pure components and mixtures. The proposed methods are marginally better than the best of other methods tested. Major advantages for the proposed equations are their relative simplicity, low computer storage requirements, and generality. No mixture interaction constants are required other than those already available in the literature.

show abstract

Section: Discussionmentioning

confidence: 99%

An improved generalized equation of state

Yamada

1973

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…The group standard fractional deviation, up, is calculated using the following equation: Lee-Kesler (1975) 3-parameter corresponding states correlation 2 Lee-Erbar-Edmister (1973) eq. of state 3 Sugie-Lu (1970, 1971) eq. of state 4 Soave (1972) modification of the Redlich-Kwong eq.…”

Section: Sources Of Heat Capacity Databasementioning

confidence: 99%

Comparison of generalized equations of state to predict gas‐phase heat capacity

Garipis

Stamatoudis

1992

AIChE Journal

View full text Add to dashboard Cite

Generalized equation of state for vapors and liquids

Sugie

1971

AIChE Journal

View full text Add to dashboard Cite

The Redlich-Kwong equation of state ( 2 3 ) is generally recognized as one of the best generalized two-parameter equations. Many attempts ( 1 , 8, 23, 24) have been made in the literature to improve its accuracy. In general, the acentric factor of Pitzer w has been used as a third parameter, in addition to the critical temperature and pressure of the original equation. In an earlier article ( 2 7 ) , a generalized pressure-explicit equation of state has been proposed for nonpolar gases in the T, & 1.0 region. In the development, the Redlich-Kwong equation of state was modified by means of a deviation function approach and Pitzer's tables ( 2 0 ) were used as a guide. The purpose of this investigation is to develop a suitable equation for the vapor and liquid regions using the same approach. It is expected that the resulting equation is applicable in the 0.56 < T, 1.0 region of Pitzer's tables, and is suitable for predicting the vapor and the liquid compressibility factors, enthalpy departures in the vapor phase, and vaporphase fugacities of nonpolar pure substances and mixtures.In addition, it satisfies 2, and the usual first two pressurevolume derivatives at the critical point. DEVELOPMENT OF PROPOSED EQUATIONFollowing the approach developed in the previous article ( 2 7 ) , the critical isotherm of the original RedlichKwong equation of state was first linearly transformed to pass through the true critical point by the introduction of a constant c in the original equation. Hence The expression for the deviation function AP was chosen as follows:determination of the coefficients of the deviation f unction. ( 5 )Furthermore, three conditions were set at the critical point as follows:Following i..e suggestions of Redlich a m Kwong ( 2 2 ) , Beattie and Bridgeman ( 3 ) , and Martin and Hou ( 1 3 ) , the following expressions were considered in this investigation for choosing the temperature function f j ( T) :f j (T) = dj T + ej f j ( T ) = dj + ej T + gj T -2 f j ( 2') = dj + ej T + gj e-5.475 TI where dj, ej, and gj are constants for pure substances. For

show abstract

Generalized Equation of State for Gases

Cited by 14 publications

References 17 publications

An improved generalized equation of state

An improved generalized equation of state

Comparison of generalized equations of state to predict gas‐phase heat capacity

Generalized equation of state for vapors and liquids

Contact Info

Product

Resources

About