Simulation of Adsorption Filters for Air Quality Control

The cosorption of water vapor and carbon dioxide on BPL activated carbon, silica gel (Grade 40), and 13X molecular sieve were investigated in this study. The explicit analytic equilibrium sorption characteristic equations for cosorption of water vapor and carbon dioxide were obtained from the correlation of experimental data of Hines and Ghosh. The cosorption heats of adsorption were calculated from these equilibrium sorption characteristic equations by applying the method of Sircar. A gas-side-controlled adsorption model, with finite transfer coefficients, for the binary mixture of water vapor and carbon dioxide was derived. In a previous work, the single-blow situation was analyzed illustrating the importance of considering both species simultaneously. This previous work also illustrated that the time scale for CO2 adsorption is much shorter that H2O adsorption. In the present work the model was extended and applied to rotary counterflow regenerative desiccant dehumidifiers, and removal efficiencies wer...

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