Sorption of gases and vapours

J. W. Me Bain, The Sorption of Gases and Vapours by Solids , Rutledge and Sons, London, 1932, Chap. 5. 

The Langmuir equation was shown to be in perfect conformity with experiments dealing with the adsorption of permanent gases at very low pressures on the surface of mica lamellae cooled to the temperature of liquid air. The same formulation appears to apply, however, more or less well to a great many of other more common instances of sorption of gases and vapours by an amorphous sorbent at less extremely low pressures and at ordinary temperatures. ... 

Chem. Soe.f 1907, xd, 1683 Phil. Mag., 1909, xdii, 916 Z. phyt. Chem., 1909, Ixviii, 471 The Sorption of Gases and Vapours by Sotids, 1932. John William McBain (Chatham, New Bninswick, 22 Mai i882-Stanford, California, 12 March 1953), professor in Bristol, then Stuiford deal. Obit. Not. F.R.S., 1953, viii, 529. 

H.B.Hopfenberg and V.Stannet, The Diffusion and Sorption of Gases and Vapours in Glassy Polymers, in R.N.Haward (Ed.), The Physics of Glassy Polymers, Applied Science Publ., London, 1973, p. 504. 

Figure 2.40 Blocking of hydrogen in hydrogen/sulfur dioxide gas mixture permeation experiments with finely microporous membranes [63] as a function of the amount of sulfur dioxide adsorbed by the membrane. As sulfur dioxide sorption increases the hydrogen permeability is reduced until at about 140 cm3 (SO2) (STP) /g, the membrane is completely blocked and only sulfur dioxide permeates. Data obtained at several temperatures fall on the same master curve ( , 0°C A. —10 °C , — 20.7 °C A, —33.6°C). Reprinted from R. Ash, R.M. Barrer and C.G. Pope, Flow of Adsorbable Gases and Vapours in Microporous Medium, Proc. R. Soc. London, Ser. A, 271, 19 (1963) with permission from The Royal Society...

As also observed by Morisato et al. (10) and by Doghieri and Sarti (75), the solubility isotherms of n-pentane in PTMSP have the usual downward curvature, which is typical of the sorption of most gases and vapours in glassy polymers. 

The nature of the movement of water, organic vapours or gases depends primarily upon the manner in which the diffusing substance is held inside the solid, and on the nature of the channels. The sorption may be ... 

Sorption by zeolites offers a powerful means for the development of methods for super purification (super desulphurization with simultaneous drying) of gases with low-level H2S content (lean gases) and which, at the same time, may have high water (H2O) concentration, up to saturation of the gas by H2O vapour. This principle, if it uses hydrophilic zeolites, is characteristic of reversibility of the sorption process, high separation performance and long lifetime of the sorbent itself. At the same time resulting waste products may not represent environmental... 

A significant difference between the sorption of organic vapours and that of permanent gases in polymer membranes is that vapour sorption leads to much larger concentrations of permeant in the membrane. Errors will arise if the resulting increase in membrane thickness is not taken into account when calculating the diffusion coefficient. ... 

The transport of liquids, vapours, and gases though polymer blends and IPN s is of fundamental importance to a polymer scientist. The driving force behind the transport process is the concentration difference between the two polymer phases or the chemical potential of the penetrant in the phases separated by the membrane. The transport process involves the sorption, diffusion, and permeation of the penetrant into the polymer system. 

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