| Popis: |
Adsorption measurements have been carried out for nitrogen on the commercial carbon blacks Spheron 6 and Vulcan. The adsorption on Spheron 6 is step-wise in the pressure range 0 to 45 mm. (fraction of surface covered approximately 10−5), and on Vulcan to at least 0.16 mm. Calorimetric measurements of differential heats of adsorption on Spheron 6 have shown that they vary with the amount of surface covered being greatest at low coverages and decreasing toward the heats of liquefaction as a limit. 1,2 This indicates that the surface of such materials contains various types of adsorption sites, having different heats of adsorption, and suggests that sufficiently refined measurements would show a step-wise adsorption isotherm. This paper reports the results of experimental studies of the adsorption of nitrogen on the carbon blacks Spheron 6 and Vulcan in the pressure range 0.00 to 75 mm., and at 0° and 100° C. |
