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Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine

For decades, carbon dioxide emissions have been an environmental and health issue. Amines like Monoethanolamine (MEA) have long been favoured in strategies based on chemical absorption aimed at CO2 capture and thus reduction of its harmful environmental impacts. However, some drawbacks, such as toxi...

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Main Authors:	Babamohammadi, Shervan, Shamiri, Ahmad, Nejad Ghaffar Borhani, Tohid, Shafeeyan, Mohammad Saleh, Aroua, Mohamed Kheireddine, Yusoff, Rozita
Format:	Article
Published:	Elsevier 2018
Subjects:	TP Chemical technology
Online Access:	http://eprints.um.edu.my/22385/ https://doi.org/10.1016/j.molliq.2017.10.151
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spelling	my.um.eprints.223852019-09-17T07:40:07Z http://eprints.um.edu.my/22385/ Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine Babamohammadi, Shervan Shamiri, Ahmad Nejad Ghaffar Borhani, Tohid Shafeeyan, Mohammad Saleh Aroua, Mohamed Kheireddine Yusoff, Rozita TP Chemical technology For decades, carbon dioxide emissions have been an environmental and health issue. Amines like Monoethanolamine (MEA) have long been favoured in strategies based on chemical absorption aimed at CO2 capture and thus reduction of its harmful environmental impacts. However, some drawbacks, such as toxicity, low stability and high cost limit widespread adoption of this technology. New and green solvents are a possible solution to this issue. As a part of the present study, CO2 solubility in aqueous solutions of different molar ratios of MEA and glycerol as a green solvent was studied. The CO2 absorption was performed at three different temperatures (303, 318, and 333 K) at normal atmospheric pressure, while CO2 partial pressure was varied from 1 to 15 kPa, and the gas flow rate in the mixture was changed from 350 to 700 ml/min. The response surface methodology (RSM) based on central composite design (CCD) was used to design the experiment and explore the effects of four independent parameters (molar concentration of MEA, molar concentration of glycerol, temperature, and gas flow rate) on the solubility of CO2 in solution. Analysis of variance (ANOVA) results showed a good agreement between the experimental data and the statistical model. The maximum solubility occurred for 4 M MEA + 2 M glycerol at 333 K and 350 ml/min CO2 flow rate. The CO2 solubility values pertaining to different pressures and concentrations were in good agreement with the general absorption trend. However, as the temperature increased, so did the loading. The findings further revealed that the optimum CO2 solubility was obtained at low glycerol to MEA ratio, as this ensured the solubility at elevated temperatures. As glycerol is a viscous fluid, it can be confirmed that it is a suitable solvent at low pressures and high temperatures. Therefore, it can be a viable alternative solution for post-combustion CO2 capture. In addition, an artificial neural network (ANN) model and correlations of CO2 solubility with CO2 partial pressure for all the studied solvent mixtures were developed in this study. Both the ANN model and the correlations fit the experimental CO2 solubility data reasonably well. Elsevier 2018 Article PeerReviewed Babamohammadi, Shervan and Shamiri, Ahmad and Nejad Ghaffar Borhani, Tohid and Shafeeyan, Mohammad Saleh and Aroua, Mohamed Kheireddine and Yusoff, Rozita (2018) Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine. Journal of Molecular Liquids, 249. pp. 40-52. ISSN 0167-7322 https://doi.org/10.1016/j.molliq.2017.10.151 doi:10.1016/j.molliq.2017.10.151
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	TP Chemical technology
spellingShingle	TP Chemical technology Babamohammadi, Shervan Shamiri, Ahmad Nejad Ghaffar Borhani, Tohid Shafeeyan, Mohammad Saleh Aroua, Mohamed Kheireddine Yusoff, Rozita Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine
description	For decades, carbon dioxide emissions have been an environmental and health issue. Amines like Monoethanolamine (MEA) have long been favoured in strategies based on chemical absorption aimed at CO2 capture and thus reduction of its harmful environmental impacts. However, some drawbacks, such as toxicity, low stability and high cost limit widespread adoption of this technology. New and green solvents are a possible solution to this issue. As a part of the present study, CO2 solubility in aqueous solutions of different molar ratios of MEA and glycerol as a green solvent was studied. The CO2 absorption was performed at three different temperatures (303, 318, and 333 K) at normal atmospheric pressure, while CO2 partial pressure was varied from 1 to 15 kPa, and the gas flow rate in the mixture was changed from 350 to 700 ml/min. The response surface methodology (RSM) based on central composite design (CCD) was used to design the experiment and explore the effects of four independent parameters (molar concentration of MEA, molar concentration of glycerol, temperature, and gas flow rate) on the solubility of CO2 in solution. Analysis of variance (ANOVA) results showed a good agreement between the experimental data and the statistical model. The maximum solubility occurred for 4 M MEA + 2 M glycerol at 333 K and 350 ml/min CO2 flow rate. The CO2 solubility values pertaining to different pressures and concentrations were in good agreement with the general absorption trend. However, as the temperature increased, so did the loading. The findings further revealed that the optimum CO2 solubility was obtained at low glycerol to MEA ratio, as this ensured the solubility at elevated temperatures. As glycerol is a viscous fluid, it can be confirmed that it is a suitable solvent at low pressures and high temperatures. Therefore, it can be a viable alternative solution for post-combustion CO2 capture. In addition, an artificial neural network (ANN) model and correlations of CO2 solubility with CO2 partial pressure for all the studied solvent mixtures were developed in this study. Both the ANN model and the correlations fit the experimental CO2 solubility data reasonably well.
format	Article
author	Babamohammadi, Shervan Shamiri, Ahmad Nejad Ghaffar Borhani, Tohid Shafeeyan, Mohammad Saleh Aroua, Mohamed Kheireddine Yusoff, Rozita
author_facet	Babamohammadi, Shervan Shamiri, Ahmad Nejad Ghaffar Borhani, Tohid Shafeeyan, Mohammad Saleh Aroua, Mohamed Kheireddine Yusoff, Rozita
author_sort	Babamohammadi, Shervan
title	Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine
title_short	Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine
title_full	Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine
title_fullStr	Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine
title_full_unstemmed	Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine
title_sort	solubility of co 2 in aqueous solutions of glycerol and monoethanolamine
publisher	Elsevier
publishDate	2018
url	http://eprints.um.edu.my/22385/ https://doi.org/10.1016/j.molliq.2017.10.151
_version_	1646210226273124352
score	13.211869

Solubility of CO 2 in aqueous solutions of glycerol and monoethanolamine

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