Prediction of adsorption equilibrium using a modified D-R equation: organic-water vapor mixtures on BPL carbon

Methods to describe and predict adsorption equilibrium using the D-R equation are presented in this paper. We focus on adsorption of organic-water vapor binary mixtures on BPL activated carbon. By adjusting the partial pressure of the organic component in the binary mixture, the effects of the presence of water vapor on adsorption of the organic component are quantitatively expressed using one term in a modified form of the D-R equation. The developed models have broad application ranges that are not limited by organic type and the loadings of the organic and water vapor. They can be used for coadsorption of water-immiscible or water-miscible organic compounds with water vapor on BPL activated carbon in the cases of small or large organic loading with low or near-saturation relative humidity. Compared with other methods for the adsorption of organic-water vapor binary mixtures, our models are simple and do not require iteration.