P-V-T measurements, dew-point pressure predictions, and collinearity studies /
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1988.
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| Online Access: | Link to OAKTrust copy |
| Abstract: | The Burnett-lsochoric method is used to obtain precise experimental vapor-phase P-ρ-T data for mixtures of 10, 25, and 50 mole per cent water in methane and for pure water (steam) at temperatures ranging from 373.15 to 498.15 K and pressures just below the dew point pressure for each temperature. Also measured are lower dew-point pressures for each mixture of water/methane. A unique analysis procedure is used to account for adsorption effects which can occur in Burnett-lsochoric measurements. The measured Burnett-lsochoric data are analyzed to obtain pure second and third virial coefficients for Steam, and mixture second and third virial coefficients for the water/m ethane mixtures. These mixture virial coefficients are then used to extract interaction second and third virial coefficients. The interaction virial coefficients are compared with existing data where possible and values predicted by the generalized correlations of Tsonopoulos (1974) and Orbey and Vera (1983). This dissertation also details the development of a method to predict dew-point pressures and demonstrates its application using wet natural gas mixtures. The method involves the virial equation of state and demonstrates the effectiveness of a truncated third virial equation of state in predicting saturation pressures. Additionally, this method provides a fundamental understanding of why the gas dew-point pressures of wet sour gases are higher than those of the corresponding wet sweet gases. Finally, the Redlich-Kwong equation of state with the recently proposed density dependent mixing rules is used to predict the cricondentherm (CT) of six hypothetical binary mixtures. The slope of the isochore passing through the CT is calculated on both the two-phase and single-phase sides of the CT and compared. This check of the physical phenomena of isochoric collinearity at the CT is then compared with similar calculations from a Redlich-Kwong equation of state with normal quadratic mixing rules. The density dependent mixing rules are found to violate collinearity while the quadratic mixing rules do not. The effect of the density dependence in the mixing rules upon predicted quantities and the size of the retrograde region is also observed. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Chemical Engineering." |
| Physical Description: | x, 135 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references (leaves 126-132). |