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.
|Number of pages||18|
|Journal||Greenhouse Gases: Science and Technology|
|State||Published - Jun 2018|
Bibliographical noteFunding Information:
WP acknowledges partial support from Pacific Northwest National Laboratory (PNNL). This work was also supported by the US Department of Energy’s (DOE) Office of Fossil Energy’s Carbon Capture Simulation Initiative (CCSI) through the National Energy Technology Laboratory. Pacific Northwest National Laboratory is operated by Battelle for DOE under Contract DE-AC05-76RL01830.
© 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.
- CO capture
- amine absorber
- computational fluid dynamics
- packed column
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry