Adsorption of hydrogen sulfide at the aqueous solution interface

Abstract

Publication costs assisted by Atomic Energy of Canada LimitedThe surface tension of H2S-saturated water has been measured at pressures up to 3.0 MPa and at temperatures within the range 25-130 °C. Monolayer coverage of the surface of the aqueous solution by H2S occurred at about one-half the saturation pressure, P8, of liquid H2S at a given temperature. Multilayer condensation increased significantly as P8 was approached. Interfacial tensions between liquid H2S and aqueous H2S solutions were measured between 30 and 40 °C. These data were used to show that the spreading coefficients, S2, for liquid H2S on water were positive and that liquid H2S spread on the aqueous phase. The standard thermodynamic properties for the adsorption of H2S on water were calculated at the zero-coverage limit between 25 and 130 °C. The unusually high adsorption coefficient for H2S on water was found to be due to a large, positive entropy of adsorption.Publication costs assisted by the National Science Foundation Measurements of the three interfacial tensions, ß, ß , and , in the three-liquid-phase, quaternary system benzene-ethanol-water-ammonium sulfate, at 21 °C, are reported. It is found that Antonoff s rule, = ß + ,37, holds to within the precision of the measurements through the whole of the three-phase region, from one critical end point to the other. The theoretical implications of this result are discussed. It is found also that the variation of ß with , 7 through the three-phase region is in qualitative accord with that predicted by theory.

Control of foaming in hydrogen sulfide/water mixtures

“…The technique for measuring surface tension with the pendant drop apparatus was tested in the binary H2S/water system. As shown in Figure 5 , the results were in good agreement with GS physical properties from Neuburg et al (1977) which was based on published data of Herrick and Gaines (1973) and Strathdee and Given (1976).…”

“…For this study, the pendant drop technique was used to measure surface tension under pressurized H2S conditions. This technique, which had previously been used by (Strathdee and Given, 1976) with H2S, was relatively simple and minimized contamination of the freshly formed surfaces.…”

Surface tension of water and acid gases from Monte Carlo simulations

“…Some experimental values of water-CO 2 interfacial tension have been reported by several authors since 1957 and a complete literature survey has been proposed in 2002 by Hebach et al 2 The reported data indicate, however, a lack of values in the case of extreme pressure and temperature conditions. Concerning H 2 S-water systems, very few data are available in the literature, and they mostly correspond to a gaseous H 2 S phase, 3,4 i.e., at pressures much lower than the ones encountered in deep reservoirs. The design of reinjection projects of CO 2 or H 2 S in deep reservoirs is, thus, hampered by this lack of experimental data of interfacial tension, and the extensive measurement of these would be too costly because of the toxicity and corrosiveness of these gases, particularly H 2 S.…”

Adsorption of Atmospheric Gases at the Air−Water Interface. I. NH3

“…There are only a few studies in the literature of gas adsorption onto water surfaces. − Much of this has described the adsorption behavior of vapors of organic liquids onto water. Water acts as a substrate with a low surface energy compared to most solid surfaces but higher than most organic liquids.…”