Adsorption of Dichlorodifluoromethane, Chlorodifluoromethane, Chloropentafluoroethane, 1,1-Difluoroethane, and 1,1,1,2-Tetrafluoroethane on Silica Gel

Adsorption of methane, ethane, and ethylene on zeolite

“…The prime source of error is in the pressure measurement, and this results in a maximum relative error in the adsorbed mass of ±5% with a typical value of 3%. Such experimental errors are common for the volumetric method in which the adsorbed mass is not directly measured (Frére et al, 1994).…”

“…This equilibrium adsorption is attained when the pressure is constant The knowledge of the gaseous volume, the temperature, and the pressure before and after each adsorption step gives the moles of gas before and after adsorption and finally, by difference, the adsorbed moles. The calculation of the moles in the gas phase was made using the modified Redlich-Kwong equation of state (Frére et al, 1994;Jadot, 1981;Prausnitz et al, 1986).…”

Adsorption of Light Hydrocarbons and Carbon Dioxide on Silica Gel

“…The prime source of error is in the pressure measurement, and this results in a maximum relative error in the moles adsorbed of (5% with a typical value of 3%. Such experimental errors are common for the volumetric method in which the moles adsorbed are not directly measured (Fre `re et al, 1994).…”

A Complete Set of Experimental Devices for the Determination of the Gas Separation Capacity of Adsorbents

“…principle of this method is based on successive expansions of the gas from a pressure cell to an adsorption cell. Knowing the volumes of the cells, the adsorbed mass can be calculated using an equation of state which provides the molar volume of the adsorbate as a function of temperature and pressure in the system before and after adsorption (Frère et al, 1994). The wholly automated apparatus enables the measurement of pure gas isotherms from 278 to 333 K at pressures up to 4000 kPa.…”