Application of Computational Mass Transfer (II) Chemical Absorption Process

Abstract

In this chapter, the two CMT models, i.e., \(\overline{{c^{{{\prime }2}} }} \text{ - }\varepsilon_{{c^{{\prime }} }}\) model and Reynolds mass flux model (in standard, hybrid, and algebraic forms) are used for simulating the chemical absorption of CO2 in packed column by using MEA, AMP, and NaOH separately and their simulated results are closely checked with the experimental data. It is noted that the radial distribution of \(D_{t}\) is similar to \(\alpha_{t}\) but quite different from \(\mu_{t}\). It means that the conventional assumption on the analogy between the momentum transfer and the mass transfer in turbulent fluids is unjustified and thus the use of CMT method for simulation is necessary. In the analysis of the simulation results, some transport phenomena are interpreted in terms of the co-action or counter-action of the turbulent mass flux diffusion.