Fang-Yuan Jou

Vaporliquid equilibria for acid gases and lower alkanes in triethylene glycol

Abstract The solubility of carbon dioxide, hydrogen sulfide, methane, ethane and propane in triethylene glycol has been determined at temperatures in the range 25° to 125°C at pressures up to 20 MPa. The experimental results were correlated by a form of the Peng-Robinson equation of state, and interaction parameters have been obtained for these systems. The parameters in the Krichevsky-Ilinskaya equation were obtained from the interaction parameters of the Peng-Robinson equation.

Solubility of H2S, CO2, CH4 and C2H6 in sulfolane at elevated pressures

Abstract The solubility of hydrogen sulfide, carbon dioxide, methane, and ethane in sulfolane [C.A. Registry No. 126-33-0] has been determined at temperatures in the range 25° to 130°C at pressures up to 7.6 MPa. The experimental results were correlated by the Peng-Robinson equation of state, and interaction parameters have been obtained for these systems. The parameters in the Krichevsky-Ilinskaya equation were obtained from the interaction parameters of the Peng-Robinson equation.

Fluid phase equilibria in the system n-butane + water

Although the phase equilibria in the system n-butane + water have been studied frequently, a review of the experimental results has revealed serious disagreement among the various investigators. In this work, the data from the literature are supplemented with some new solubility data. These data are then used construct a model, based on Henrys law, for the phase equilibria.

Phase equilibria in the system n-butane-water-methyldiethanolamine

Abstract Aqueous solutions of alkanolamines are often used to remove the acid gases (CO 2 and H 2 S) from hydrocarbon streams. The application of the absorption process to liquid hydrocarbons is not as well developed as its use for gaseous hydrocarbon streams. As well, experimental data for systems of amine solutions and liquefied petroleum gases are scarce. New data have been obtained for the equilibria in the system n -butane-water-methyldiethanolamine (MDEA). A knowledge of the phase behavior in this system is needed to model the equilibria encountered in the quaternary and quinary systems of industrial importance. In this work vapor-liquid, liquid-liquid and vapor-liquid-liquid equilibria have been measured at temperatures between 25° and 150°C at pressures up to 20 MPa for a 3 M solution of MDEA.

Azeotropy and critical behavior in the system propane-hydrogen sulfide

There is a large discrepancy in the values reported in the literature for the azeotrope in the system propane-hydrogen sulfide. Previous investigations did not measure the azeotrope directly, but inferred it from other equilibrium measurements. In this work the azeotrope was measured directly. Correlations based on the new data were developed. In addition the binary critical locus was determined. The new values for the critical locus are in good agreement with the values reported in the literature. A comparison was made with several simple correlations for binary critical loci. The results of these comparisons showed that while good correlations exist for the critical temperature, the correlations for the critical pressure are not as good.

Effect of CO2 and H2S on the solubility of methanethiol in an aqueous methyldiethanolamine solution

Abstract This investigation was carried out to determine the solubility of methanethiol in a methyldiethanolamine (MDEA) solution. Measurements were made in the absence of acid gases, H 2 S and CO 2, with individual acid gases present, and with mixtures of acid gases present. Initially, measurements of the solubility of methanethiol in water were made at temperatures between 25 and 100°C to confirm the sampling and analytical techniques. Experiments with an aqueous solution of 50 mass% methyldiethanolamine were carried out at 40 and 70°C. The total pressure for most of the experiments was 6890 kPa, which was maintained by methane. Partial pressures of methanethiol ranged from 0.4 to 557 kPa.

The distribution of hydrogen sulfide between an aqueous amine solution and liquid propane

Abstract In this work, new data are presented for the equilibrium in the system hydrogen sulfide-propane-water-methyldiethanolamine (MDEA). The concentration of the MDEA in the aqueous phase was 3 M. Data for the equilibrium between an aqueous liquid, a non-aqueous liquid and a vapor were obtained for five temperatures between 0° and 100°C and for pressures up to 8.8 MPa.

Effect of H2 S on the Solubility of Ethane in Alkanolamine Solutions

Abstract The solubility of ethane has been measured in 3 M solutions of alkanolamines at 75 °C. The solutions also contained various loadings of H2S. Partial pressures of ethane varied up to 6880 kPa. The effect of the hydrogen sulfide on the solubility of ethane is highly non-linear.