AWWA ACE94181

Pore Structure characterization provides important information for predicting the adsorption behavior of both virgin and regenerated activated carbons. When other factors such as surface functional groups or regeneration procedures are equal, the capacity for adsorbing a compound correlated well with the volume of pores that were appropriately sized to contain the compound. By employing nitrogen adsorption isotherms, one can monitor the progression of a carbon's pore development during activation or regeneration. Other adsorptives, such as argon or carbon dioxide, could also be used for this purpose. A common pore model for interpreting nitrogen adsorption isotherms has been the Barrett, Joyner, and Halenda (BJH) model. The author explored the usefulness of both this model and the Density Functional Theory model, which has been developed within the past two years by Oliver and Conklin. The suitability of regeneration has commonly been monitored by the iodine number test, which is rapid, convenient, and common. The iodine number correlated well with the adsorption of small organic compounds that were roughly the same size as iodine, but it did not correlate well with the adsorption of larger organic compounds.

Product Details

Published:

01/01/1994

ISBN(s):

0898677750

Number of Pages:

21

File Size:

1 file , 680 KB