The Adsorption of Butane on Glass Spheres

The Adsorption of Nitrogen, Argon, and Oxygen on Potassium Chloride at 78–90°K.

“…The Harkins-Jura plots for argon and oxygen are curves convex to the axes (figure 4). Further experiments on other systems would be required to determine whether this shape of Harkins-Jura plot can be correlated with a low value of c. Davis and DeWitt (5) found such curves for butane on glass where c had values from 5 to 11, whereas Emmett and Cines (11) found straight lines for nitrogen on carbon blacks where c had values of 127 and 665. Hill (19) has shown that, on the basis of the B.E.T.…”

Adsorption Studies. Physical Adsorption of Nitrogen, Toluene, Benzene, Ethyl Iodide, Hydrogen Sulfide, Water Vapor, Carbon Disulfide, and Pentane on Various Porous and Non-Porous Solids.

“…method from isotherms for various gases to areas calculated from the nitrogen adsorption isotherms ) having C-values between 3 and 8 were linear in the p/p0 range 0.4-0.8 when itted according to equation 2. In table 2 and table 6 all h-values for the pois glasses are designated as being uncertain for those adsorbates for which the values are 10 or less. This uncertainty arises from the distortion of the isotherms for various gases on porous glass in the relative pressure range 0.4-1.0 that results from the pore distribution.…”

“…Ul bi ^(Ei-EOlKT CLibi E\ being the average heat of adsorption in the first layer of adsorbed gas, EL the heat of liquefaction of the adsorbate, and ^/ a group of kinetic constants which has usually been assumed to have a value of approximately unity but actually (5,6) may deviate considerably from unity.…”

Surface Area Changes of a Vermiculite by Acid and Thermal Treatment

“…Table 6 shows the surface areas that have been calculated from Fig. 2, assuming that the cross-sectional area of the adsorbed n-butane molecule at 0~ is 32 ~_2 (Davis and DeWitt, 1948). 1 In a sample of vermiculite treated with HC1 5 N the total amount of gee3 removed was 100 percent, which corresponds to total destruction of the silicate lattice.…”