NDLI: Mass Transfer Performance Study for CO2 Absorption into Non-Precipitated Potassium Carbonate Promoted with Glycine Using Packed Absorption Column

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Mass Transfer Performance Study for CO2 Absorption into Non-Precipitated Potassium Carbonate Promoted with Glycine Using Packed Absorption Column

Content Provider	MDPI
Author	Mustafa, Nur Farhana Ajua Shariff, Azmi Mohd Tay, Wee Horng Halim, Hairul Nazirah Abdul Yusof, Siti Munirah Mhd
Copyright Year	2020
Abstract	The removal of carbon dioxide (CO₂) at offshore operation requires an absorption system with an environmentally friendly solvent that can operate at elevated pressure. Potassium carbonate promoted with glycine, PCGLY, is a green solvent that has potential for offshore applications. For high solvent concentrations at elevated pressure, the by-product of CO₂ absorption consists of precipitates that increase operational difficulty. Therefore, this study was done to assess the CO₂ absorption performance of non-precipitated PCGLY with concentration 15wt%PC+3wt%GLY, which is known to have comparable solubility performance with MDEA. A packed absorption column was used to identify the CO₂ removal efficiency, mass transfer coefficient in liquid film, $k_{l} a_{e},$ and overall volumetric mass transfer coefficient, $K_{G} a_{v}$ . A simplified rate-based model was used to determine $k_{l} a_{e}$ and $K_{G} a_{v}$ based on the experimental data with a maximum MAE value, 0.057. The results showed that liquid flow rates and liquid temperature gives significant effects on the $k_{l} a_{e}$ and $K_{G} a_{v}$ profile, whereas gas flow rate and operating pressure had little effect. The CO₂ removal efficiency of PCGLY was found to be 77%, which was only 2% lower than 1.2 kmol/m³ MDEA. $K_{G} a_{v}$ of PCGLY is comparable with MDEA. The absorption process using PCGLY shows potential in the CO₂ sweetening process at offshore.
Starting Page	3873
e-ISSN	20711050
DOI	10.3390/su12093873
Journal	Sustainability
Issue Number	9
Volume Number	12
Language	English
Publisher	MDPI
Publisher Date	2020-05-09
Access Restriction	Open
Subject Keyword	Sustainability Environmental Engineering Co2 Absorption Mass Transfer Coefficient Potassium Carbonate Glycine Packed Absorption Column
Content Type	Text
Resource Type	Article

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