Abstract
The accurate design of a packed column is largely dependent upon the accurate calculation of the effective mass transfer area (ae ) of a packing. The experimental and the modelling study for the packed column with CO2-Monoethanolamine (MEA) system has been reported by employing Sulzer DX packing. The model validation results revealed that the modification in the available simple ae correlations is necessary to attain the reliable results using Sulzer DX packing. Recently, a new simple ae correlation suitable for Sulzer DX packing with MEA-CO2 system has been reported. Therefore, in the present study, the rate-based model is developed using the newly developed ae correlation for the packed absorption column with Sulzer DX structured packing for CO2-MEA system. The model has been successfully validated with the experimental data. Overall results depict good accuracy (AAD < 15%) of predicted CO2 concentration profiles due to the reliable ae calculations. However, the relative accuracy is low at high liquid flowrates (> 8 m3/m2h) due to the design limitations of the ae correlation. Therefore, in this study, the adopted ae mass transfer correlation is found suitable for the reliable modelling of the packed absorption column with Sulzer DX packing.
Highlights
Carbon dioxide (CO2) being a greenhouse gas is a major cause of global warming
In order to separate a solute gas from the flue gas mixture by using a liquid solvent, it is necessary to provide intimate contact between gas and liquid phases
This is possible in different types of equipment such as tray columns, bubble columns and packed columns
Summary
Carbon dioxide (CO2) being a greenhouse gas is a major cause of global warming. the industrial flue gases are treated to remove CO2 before releasing to the environment [1]. There are number of models published based on various experimental and theoretical studies They have different limitations in terms of packing types, solvent properties and hydrodynamic conditions [8,9,10]. The mathematical model for the packed column is proposed in which the effective mass transfer area is calculated using Onda et al [12] and Henriques de Brito et al [13] correlations. The effective mass transfer area of the packing has been calculated using the correlation proposed by Gao et al [15] The model has been validated with the experimental data taken from the study of De Montigny et al [11]. The calculations are initiated from the top segment of the packed column and continued until the bottom composition of gas is attained
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