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Prediction Of The Physical Properties Of Pure Gases And Liquids, James L. Filson

Theses

A computer programmed system for the estimation of physical properties of pure compounds from minimum data input on compound type and structure was developed for both gas and liquid phase conditions.

The properties of the gas phase which can be obtained include:

• gas volume
• compressibility
• normal boiling point
• volume at the normal boiling point
• critical temperature, pressure, volume compressibility
• vapor pressure
• Riedel factor
• acentric factor
• ideal heat capacity
• heat capacity at constant pressure
• heat capacity at constant volume
• dipole moment
• intermolecular distance
• hard sphere volume
• viscosity at low pressure
• viscosity at elevated pressure
• thermal conductivity at low pressure
• thermal conductivity …

A Modified Redlich-Kwong Equation For Nonpolar And Slightly Polar Gases, David G. Skamenca

Theses

The PVT prediction capability of the Redlich-Kwong equation is substantially improved through the use of a generalized correlation based on the acentric factor. No experimental data is required to obtain the improved constants. Only the acentric factor and the critical properties of the pure gas are needed. The correlation of improved constants is limited to non-polar and slightly polar pure gases and mixtures in the supercritical temperature range.

The correlation applies to a reduced temperature range 1.00 le; T_R le; 1.60 and a reduced pressure range of 0.030 le; P_R le; 3.00. The correlation reduces deviations by as …

Correlation And Prediction Of Diffussion Coefficients In Binary Gas Systems, Raymond Gerald Bailey

Theses

A correlation was developed for estimating binary gas diffusion coefficients by the reference substance method, in this case using the viscosity of air and subsequently its corresponding temperature. The derivation was made by the linear least square analysis of 65 different binary systems comprising 161 separate data points at temperatures ranging from 193°K. to 1200°K. At any given temperature only the critical molal volume and the molecular weights of the two gases of interest are required to calculate the diffusion coefficient. The correlation based on the viscosity of air had an average error of 7.67%. The correlation using temperature had …

Critical Interaction Constants For Binary Gas Mixtures For Use In The Redlich-Kwong Equation Of State, Warren J. Biss

Theses

In this work, critical interaction constants were used to evaluate the interaction coefficients of the Redlich - Kwong constants for bin-ary gas mixtures. From these constants, the pressure - volume - temperature behavior of the mixtures was calculated using the Redlich - Kwong equation.

The critical interaction constants, T₁₂ and P₁₂ , were evaluated for binary mixtures by solving, simultaneously, two second degree equations relating terminal slopes for critical pressure loci and the mole fractions of the components present. The feasibility of this method was tested by calculating P-V-T data for binary mixtures and comparing this with values …

Gas Phase Fugacity Coefficients, Harvey Joel Klee

Theses

A method is presented for calculation of fugacity coefficients in gas mixtures. This work is based on a recent paper by Leland, Gamson, and Chappelear, wherein they presented a new method for evaluation of ideal K values. The information required for the method presented here includes pure component physical properties, and generalized tables or equations for compressibility factors, fugacity coefficients, and real gas enthalpy departure terms. Pseudo-critical temperatures and pressures for the mixture are calculated using the expressions presented by Leland and Mueller.

Five different binary systems consisting of paraffin hydro-carbon and CO₂ mixtures containing 318 separate points were …

Activity Coefficients Of Gases In Binary Mixtures, John Gressler Engleman

Theses

The theory and usefulness of vapor phase activity coefficients have been developed. The equations, charts and calculation procedures to be used for the three methods are included with a set of sample calculations in their most convenient form.

Activity coefficients for 236 experimental points have been calculated by the three methods for both components of tour binary gaseous systems. These systems are Argon - Ethylene (36 points), Hydrogen - Nitrogen (32 points), Methane - Ethane (112 points) and Methane - n Butane (56 points). Wide ranges of pressure, temperature and mol fraction are included.

The % deviations of calculated from …

A Generalized Correlation For The Effect Of Pressure On The Isobaric Heat Capacity Of Gases, Alvin Harvey Weiss

Theses

A generalized correlation is submitted for the deviation of the isobaric heat capacity of hydrocarbons from the ideal state. The range of conditions included is from reduced pressure = 0.2 - 15 and reduced temperature = 1.0 - 5.5. The curves presented have been based on data calculated from the Benedict - Webb - Rubin Equation of State, which is believed to be the most accurate method presently available for caleulating the heat capacity deviation.

The results indicate that the order of magnitude of the correction ts quite large, especially in the critical region. The average absolute error of this …