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Generalized compressibility charts

Some of the equations of state discussed above are applicable to liquids as well as gases. For example, the Benedict-Webb-Rubin equation of state provides reasonable estimates for most hydrocarbons. The generalized compressibility charts that will be discussed in the next section are based on an extension of this equation of state and can be used for both gas and liquid phases. Alternatively, correlations have been developed explicitly for the liquid phase. For example, the liquid volume at saturation is given by the Rackett equation  [Pg.246]

EXAMPLE 4.11 Temperature Correction for Molar Volume of Solid Cu Determine the molar volume of copper at 500°C from the data in Table 4.4. SOLUTION We can rewrite Equation (4.32) as foUows Separation of variables leads to  [Pg.246]

The principle of corresponding states invokes a unique generalized relation between the compressibility factor and reduced temperature and pressure for a given class of molecules. It is sometimes convenient to have graphs or tables that quantify this relationship. In this section, we present charts and tabular data for the compressibility [Pg.246]

The first term on the right hand side of Equation (4.35), accounts for simple molecules, while the second term, is a correction factor for the nonsphericity of a species. Both and depend only on Tr and P.  [Pg.247]

The generalized compressibility factor using the Lee-Kesler equation is an option in the equation of state menu of the Thermo Solver software that comes with the text. [Pg.247]


The generalized compressibility charts may be used with values obtained in the use of Equations 2.7 and 2.8 to determine the compressibility of a wide range of gases. The charts were derived from experimental data and are a good source of information for use in compressor calculations [1]. [Pg.17]

Step 7. From the general compressibility charts in the Appendix, Z = Q5. [Pg.23]

Figure B-24. Generalized compressibility chart. (Excerpted by special permission from Chemical Engineering, July 1959, copyright 1954, by McGraw-Hill, Inc., New York, NY.)... Figure B-24. Generalized compressibility chart. (Excerpted by special permission from Chemical Engineering, July 1959, copyright 1954, by McGraw-Hill, Inc., New York, NY.)...
Generalized compressibility charts. 17, 517-20 Goodman diagram, 251 Guide vanes, 148... [Pg.546]

From the generalized compressibility chart (figure 2.3) the z is about 0.40. [Pg.46]

This calculation is very close to the critical temperature of the mixture (TR = 1.10). Simple methods (and some complex methods as well) are not very accurate for predicting densities in this region. From the generalized compressibility chart it can be seen that z changes rapidly with small changes in the reduced temperature. [Pg.47]

Calculate the injection pressure for a 50-50 mixture of hydrogen sulfide and carbon dioxide. The reservoir is at a pressure of 2000 kPa, is at a depth of 750 m, and is isothermal at 20°C. Assume the acid gas will remain gaseous throughout the injection. Further assume (a) the gas is an ideal gas and (b) the gas is a real gas with properties described by the generalized compressibility chart. Take the properties of hydrogen sulfide and carbon dioxide from table 2.1. [Pg.218]

From the generalized compressibility chart this gives z = 0.84. From equation (9.10) ... [Pg.219]

Look up the value of z on a generalized compressibility chart, which plots z versus Pr for specified values of T. ... [Pg.207]

Figure 5.4-1 shows a generalized compressibility chart for those fluids having a critical compressibility factor of 0.27. Conditions for both gases and liquids are illustrated, although in our discussions here we only consider estimation of z for gases. Note the increasing deviations from ideal gas behavior as pressures approach Pc O-e-, when Pr 1). [Pg.207]

The procedure for using the generalized compressibility chart for PVT calculations is as follows ... [Pg.208]

Figure 5.4-2 Generalized compressibility chart, low pressures. (From D. iM. Himmelblau. Basic Principles and Calculations in Chemical Engineering, 3rd Edition, copyright 1974, p. 175. Reprinted by permission of Prentice Hall, Inc., Englewood Qiffs, NX)... Figure 5.4-2 Generalized compressibility chart, low pressures. (From D. iM. Himmelblau. Basic Principles and Calculations in Chemical Engineering, 3rd Edition, copyright 1974, p. 175. Reprinted by permission of Prentice Hall, Inc., Englewood Qiffs, NX)...
The compressibility-factor equation of state used in conjunction with the generalized compressibility chart is not generally as accurate as a multiple-constant equation of state for PVT calculations under highly nonideal conditions. Furthermore, it lacks precision and cannot readily be adapted to computer calculations. Its advantages include relative computational simplicity and (as will be shown) adaptability to multicomponent gas mixtures. [Pg.209]

Answers, p. 658) the ideal gas equation of state How would you use the generalized compressibility chart... [Pg.210]

What is the law of corresponding states, and how does it provide a basis for the generalized compressibility chart ... [Pg.210]

The basis of the generalized compressibility charts is the law of corresponding states, an empirical rule stating that the compressibility factor of a species at a given temperature and pressure depends primarily on the reduced temperature and reduced pressure, T, - T Tc and Pr = P Pc- Once you have determined these quantities, you may use the charts to determine z and then substitute the value in the compressibility-factor equation of state and solve for whichever variable is unknown. [Pg.213]

When doing PVT calculations in parts (b) and (c). use the generalized compressibility chart if possible for the fully charged tank and assume that the tank contains pure nitrogen. [Pg.233]

Both Vri and are easy to calculate since Tc and pc are presumed known. The development of the generalized compressibility chart is of considerable practical as well as pedagogical value because it enables engineering calculations to be made with considerable ease and also permits the development of thermodynamic functions for gases for which no experimental data are available. All you need to know to use... [Pg.272]

In instances where the temperature or pressure of a gas mixture is unknown, it is convenient, to avoid a trial-and-error solution using the generalized compressibility charts, to compute a pseudocritical ideal volume and a pseudoreduced ideal volume as illustrated below. Suppose we have given that the molal volume of the gas mixture in the preceding problem was 326 cm at 90.0 atm. What was the temperature ... [Pg.287]

A 100-ft tank contains 95.1 lb moles of a nonideal gas at 1250 atm and 440 F. The critical pressure is known to be 50 atm. What is the critical temperature Use a generalized compressibility chart to obtain your answer. [Pg.345]

If the pressure is high, corrections for departure from ideal gas behavior must be taken into account equations of state or generalized compressibility charts are usually sufQcient. [Pg.982]

Comments To assess the validity of the truncated virial we check with a generalized compressibility chart. The reduced coordinates of water at this state are... [Pg.294]

Fugacity coefficients define the deviation from non-ideal to ideal gas behavior and can be determined from generalized compressibility charts or from suitable equations of state [e.g., Soave-Redlich-Kwong, Eq. (6.11.61) for details see Soave (1972)] ... [Pg.687]

Figure 3.3 Generalized compressibility chart. (Reproduced from E. F. Obert, Concepts of Thermodynamics, McGraw-Hill, New York, 1960.)... Figure 3.3 Generalized compressibility chart. (Reproduced from E. F. Obert, Concepts of Thermodynamics, McGraw-Hill, New York, 1960.)...

See other pages where Generalized compressibility charts is mentioned: [Pg.17]    [Pg.64]    [Pg.64]    [Pg.46]    [Pg.189]    [Pg.209]    [Pg.211]    [Pg.213]    [Pg.233]    [Pg.234]    [Pg.234]    [Pg.271]    [Pg.272]    [Pg.161]    [Pg.186]    [Pg.186]    [Pg.231]    [Pg.17]    [Pg.285]    [Pg.66]    [Pg.67]    [Pg.68]    [Pg.68]    [Pg.68]   
See also in sourсe #XX -- [ Pg.246 , Pg.247 , Pg.248 ]




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