Adsorption equilibria of chlorinated organic solvents onto activated carbon
- Adsorption equilibria of chlorinated organic solvents onto activated carbon
- 윤정호; 최대기; 김성현
- Issue Date
- Industrial & engineering chemistry research
- VOL 37, NO 4, 1422-1427
- Adsorption equilibria of dichloromethane, 1,1,1-trichloroethane, and trichloroethylene on
activated carbon were obtained by a static volumetric technique. Isotherms were measured for
the pure vapors in the temperature range from 283 to 363 K and pressures up to 60 kPa for
dichloromethane, 16 kPa for 1,1,1-trichloroethane, and 7 kPa for trichloroethylene, respectively.
The Toth and Dubinin-Radushkevich equations were used to correlate experimental isotherms.
Thermodynamic properties such as the isosteric heat of adsorption and the Henry’s constant
were calculated. It was found that the values of isosteric heat of adsorption were varied with
surface loading. Also, the Henry’s constant showed that the order of adsorption affinity is 1,1,1-
trichloroethane, trichloroethylene, and dichloromethane. By employing the Dubinin-Radushkevich
equation, the limiting volume of the adsorbed space, which equals micropore volume,
was determined, and its value was found to be approximately independent of adsorbates.
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