Device‐scale CFD modeling of gas‐liquid multiphase flow and amine absorption for CO₂capture

Abstract

In this paper we aim to develop a validated device‐scale CFD model that can predict quantitatively both hydrodynamics and CO2 capture efficiency for an amine‐based solvent absorber column with random Pall ring packing. A Eulerian porous‐media approach and a two‐fluid model were employed, in which the momentum and mass transfer equations were closed by literature‐based empirical closure models. We proposed a hierarchical approach for calibrating the parameters in the closure models to make them accurate for the packed column. Specifically, a parameter for momentum transfer in the closure was first calibrated based on data from a single experiment. With this calibrated parameter, a parameter in the closure for mass transfer was next calibrated under a single operating condition. Last, the closure of the wetting area was calibrated for each gas velocity at three different liquid flow rates. For each calibration, cross validations were pursued using the experimental data under operating conditions different from those used for calibrations. This hierarchical approach can be generally applied to develop validated device‐scale CFD models for different absorption columns. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.

Computational Fluid Dynamics Based Modeling of Gas Absorption Process: A State-of-the-Art Review

“…Simplification of the real structure, such as simplifying the packing structure to porous medium, can speed up the simulation process. 60,166,449 A lowdimensional modeling method, such as a one-dimensional modeling of the gas absorption in a packed bed, has also been widely applied. 30,33 One-dimensional modeling has also been applied on the gas absorption in a spray tower.…”

“…Simplification of the real structure, such as simplifying the packing structure to porous medium, can speed up the simulation process. ,, A low-dimensional modeling method, such as a one-dimensional modeling of the gas absorption in a packed bed, has also been widely applied. , One-dimensional modeling has also been applied on the gas absorption in a spray tower . In combining the droplet hydrodynamics and modified thermodynamics and chemical reactions, the removal efficiency of SO 2 in a spray tower was easily calculated .…”

A Review on Computational Fluid Dynamics Simulations of Industrial Amine Absorber Columns for CO2 Capture

“…The absorption columns have a packing bed to create a suitable contact surface between the gas containing CO 2 and the liquid. The amount of CO 2 absorption and mass transfer depends on the distribution of liquid flow on the packings 13–15. Structured packings are widely used in absorption, distillation, scrubbing and extraction columns, and these offer a highly effective area per unit volume 16–18.…”

“…Pan et al. 15 developed a validated device‐scale CFD model that could predict quantitatively both hydrodynamic and CO 2 capture efficiency for an amine‐based solvent absorber column with a random Pall ring packing. Gbadago et al.…”