Activated carbon working capacity

The results of the adsorption experiments are presented in table 2. The equilibrium solubilities at the same conditions were determined and reported in a previous work [10]. The density values used were those of pure C02 [12] because nimesulide is only a trace component (max. solubility 0.0446 g/1 at 22 MPa). As it can be seen, the sorbate capacity of activated carbon decreases with increasing pressure and density of C02, regarding the values at similar concentrations as well as the total adsorption capacity at saturation concentrations. The higher solvent power of C02 at increasing pressure/density could be an explanation for the adsorption equilibrium shift in direction to lower coverage. 

Working capacity of activated carbon 28 lb TCE per 100 lb carbon Inlet concentration of TCE 2000 ppm (by volume)... 

In this work we developed a methodology to produce activated carbons of high adsorption capacity and with controlled pore size, based on the KOH catalysed gasification with CO2 of a coconut shell char. To study the effect of potassium in the activation step two series of activated carbons were prepared, with (CK1173) and without KOH (DC1173), The results obtained show that the size of the micropores is much smaller in the series CKl 173. 

The dynamic adsorption capacity of activated carbon containing monoliths has been shown to be equivalent to the micropore volume. However, this condition can only be met when the external area is above c. 100 m g" and the threshold diameter wide. In systems with no micropore volume or poor internal diffusion due to a low external surface area and narrow threshold diameter the breakthrough point is reached when c. 9% of the external area is covered. Future work will concentrate on using higher linear velocities and adsorption temperatures md different monolith geometries (wall thickness and channel width) in order to study the internal diffusion limitations of these types of adsorption units. 

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