HEATS OF ADSORPTION OF ARGON ON A SERIES OF CARBON BLACKS GRAPHITIZED AT SUCCESSIVELY HIGHER TEMPERATURES
AMHERST COLL MA
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Calorimetric heats of adsorption were measured for A at -195 deg C on C black Spheron 6 graphitized at 1000, 15000, 2000, and 2700 deg C. Experimental data are shown on isotherms and heat-coverage curves. The volumes adsorbed at given pressure up to PP sub o 0.4 decreased in the order of increasing graphitization but above PP sub o 0.5 the volume increased. Heat- coverage curves indicated that 1 in the region VVm 0 to 0.4 the differential heats decrease with the graphitization up to 2000 deg C but remain constant between 2000 and 2700 deg C, 2 in the region VVm 0.4 to 1.0 the arrest changes to a maximum which becomes higher with graphitization, and 3 the slope of the curve near Vm increases with increased graphitization beyond Vm a second degree of graphitzation appeared to occur between 1000 and 2000 deg C.
- Physical Chemistry