ADSORPTION EQUILIBRIUM AND KINETICS FOR MULTIPLE TRACE IMPURITIES IN VARIOUS GAS STREAMS ON ACTIVATED CARBON

Equilibrium and kinetic adsorption data for seven trace impurities (propylene, Freon-12 (CF2Cl2), n-butane, methylene chloride, acetone, n-hexane, toluene, and Freon-22 (CHFCl2)) from various carrier gases (helium, nitrogen, methane, carbon dioxide, and a mixture of methane and carbon dioxide) are provided. Activated carbon at several temperatures and pressures is used as the adsorbent. Two empirical characteristic curves, one relating equilibrium isotherms of trace impurities with their physical properties and the other relating mass-transfer coefficients with equilibrium properties, are generated. These can be used to predict equilibrium capacities and mass-transfer zone lengths for multiple trace impurities from a carrier gas and design a thermal swing adsorption clean-up system.