Isotherms for the adsorption of ethane, propane, dimethyl ether and diethyl ether by activated charcoal were obtained at temperatures from 0° to 183° and at pressures varying from less than l mm. to about 1 atm. With the hydrocarbons equilibrium was attainable only after long periods of time. The isotherms for the hydrocarbons are in general almost rectilinear; those for the ethers have the usual form. At low temperatures the isotherms for the hydrocarbons show a peculiar type of break in the curve. The amount of vapor adsorbed decreases with an increase in the complexity of the adsorbed molecules. Semi-log isotherms, double-log isotherms, isobars and isosteres were calculated from the natural isotherms. The heat of adsorption was calculated from the slope of the isosteres.
Proceedings of the Iowa Academy of Science
© Copyright 1930 by the Iowa Academy of Science, Inc.
Pearce, J. N. and Peters, Paul E.
"The Adsorption of Certain Vapors by Activated Charcoal,"
Proceedings of the Iowa Academy of Science, 37(1), 223-223.
Available at: https://scholarworks.uni.edu/pias/vol37/iss1/37