Coadsorption of n-alkyl alcohols and hydrogen sulfide at the aqueous solution interface

Abstract

Publication costs assisted by Atomic Energy of Canada LimitedAdsorption of H2S at the gas-liquid interface of aqueous solutions of three normal alcohols was found to decrease with increased surface coverage of the n-alkyl alcohols. The free energy of adsorption of H2S calculated at its zero-coverage limit increased with the carbon number at a fixed surface excess of the n-alkyl alcohol in the sequence n-propyl < n-butyl < n-pentyl. Similarly, adsorption of these normal alcohols at the aqueous interface was reduced by high pressure of H2S, that is, the free energy of adsorption of each n-alkyl alcohol at zero coverage increased with the surface excess of H2S. Since adsorption of neither H2S nor n-alkyl alcohols is enhanced in these three-component systems, repulsive interactions between adsorbates must be dominant. A model based on kinetic theory is employed to explain these observations.

The Variation of Surface Tension and Contact Angle under Applied Pressure of Dissolved Gases, and the Effects of These Changes on the Rate of Bubble Nucleation

“…4, when a capillarograph was constructed, following the path A to J it was pressure. In one case (19), similarly rapid results (with no aging effects after 15 s) have been obtained using a pendent arranged that the rod was completely dry at A, before the experiment started. It is clearly noticeable that the weight drop method.…”