Vapour Antoine equation

The jacket steam pressure, Pj, is itself a function of the jacket steam temperature, Tj, as listed in steam tables or as correlated by the Antoine equation for vapour pressure, where... 

As boiling proceeds, the loss of the lightest organic vapours will cause the boiling point to increase with time. The vapour pressures Pj and P of the pure components can be calculated using the Antoine equation... 

The vapour pressures of the pure liquids can be calculated from the Antoine equation (see Chapter 8) ... 

The equation presented here, due to Haggenmacher (1946), is derived from the Antoine vapour pressure equation (see Section 8.11). 

At 200°C, the vapour pressure must first be estimated, from the Antoine equation ... 

Several equations have been developed to express vapour pressure as a function of temperature. One of the most commonly used is the three-term Antoine equation, Antoine (1888) ... 

The saturation vapour pressures are calculated as a function of temperature using the Antoine equation, equation 11.6, and the constants given in Example 11.3, and then, from Raoult s Law, Equation 11.1, the actual vapour pressures are given by ... 

The Antoine equation (16a) is normally used for a vapour-liquid mixture, whereas eq. (16b) is normally... 

Of course, the vapour pressure is very temperature dependent, and reaches P° = 101.325 kPa at the normal boiling point, Tb. The isochoric thermal pressure coefficient, dp/dT)v = otp/KT, can be obtained from the two quantities on the right hand side listed in Table 3.1. Except at T it does not equal the coefficient along the saturation line, (dp/dT)a, which is the normal vapour pressure curve. The latter temperature dependence is often described by means of the Antoine equation ... 

Mujtaba and Macchietto (1988) and Mujtaba (1989) used two typical binary mixtures and a variety of separation specifications to demonstrate how optimal recycle policies can be obtained and to assess the validity of the degree of difficulty measure. The mixtures were 1) Benzene-Toluene 2) Butane-Pentane. For simplicity ideal equilibrium and Antoine s vapour pressure equations were used. The light component was always the first one. 

From the published literature [89,744,860,1514,1591] assembled by Stull [1971], the vapour pressure data of phosgene have been processed [1541] in the form of the Antoine equation. Equation (6.3) ... 

The parameter is a general function of the acentric factor ca, while k is a parameter to be found by regression. The evaluation of accuracy showed an error in correlating the vapour pressure under 1%, typically between 0.2 and 0.3%. The accuracy of PRSV is by an order of magnitude better as PR EOS and the same as Antoine equation. SRK2 and PRSV are of comparable accuracy. 

The plots indicate that the non-ideality is significant at higher concentrations. Consequently, liquid activity coefficients should be used. Because NHj is subcritical, there is a choice between symmetric and asymmetric conventions. In the first case, Antoine equation is necessary for both components. In the second case, Henry constant for ammonia-water pair is required, but this may be obtained from the slope of the experimental curves plotted in Fig. 6.14. Vapour pressures and Henry constants are ... 

There is one very widely used equation for estimating the vapour pressure of organic liquids, the Antoine equation... 

Vapour pressure equation constants (Logio, mmHg) Antoine equation A... 

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