Abstract
An apparatus is described for measuring adsorption of binary gas mixtures by particulate solids. Adsorption equilibrium is established by passing a gas mixture of known composition through the adsorption chamber in a thermostat at a controlled pressure (quasi–static method). The gas contained in the adsorption chamber is then transferred to a gas chromatograph by a carrier gas, and the amount of both adsorbates is determined by integration of their elution profiles. The adsorption of binary gas mixtures of propene + propane by graphitized carbon black over the pressure range 10–1000 mbar has been studied at three temperatures (283–313 K) by this method. The consistency of the results was tested by gravimetric measurements of the total adsorbed mass. A weak preferential adsorption of propane from the gas mixture is found, the separation factor α varying between 1·0 and 1·25, depending on pressure, temperature and gas phase composition.
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