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Absorption of carbon dioxide in mixtures of N-methyl-2-pyrrolidone and 2-amino-2-methyl-1-propanol

Karlsson, Hanna K. LU ; Sanku, Meher G. LU and Svensson, Helena LU (2020) In International Journal of Greenhouse Gas Control 95.
Abstract

It has been suggested that non-aqueous solvents containing amines may provide alternatives to aqueous alkanolamine solvents due to the potentially lower energy requirement for the regeneration of the amine. This paper presents experimental data on the solubility of CO2 and heat of absorption in the organic solvent N-methyl-2-pyrrolidone (NMP) and mixtures of 2-amino-2-methyl-1-propanol (AMP) in NMP. The solubility of CO2 was found to be very low at temperatures above 70 °C, the temperature at which the AMP/NMP solvent can be regenerated. The solubility of CO2 was higher at lower temperatures, particularly when precipitation of the AMP carbamate occurred. The heat of absorption in the AMP/NMP solvent... (More)

It has been suggested that non-aqueous solvents containing amines may provide alternatives to aqueous alkanolamine solvents due to the potentially lower energy requirement for the regeneration of the amine. This paper presents experimental data on the solubility of CO2 and heat of absorption in the organic solvent N-methyl-2-pyrrolidone (NMP) and mixtures of 2-amino-2-methyl-1-propanol (AMP) in NMP. The solubility of CO2 was found to be very low at temperatures above 70 °C, the temperature at which the AMP/NMP solvent can be regenerated. The solubility of CO2 was higher at lower temperatures, particularly when precipitation of the AMP carbamate occurred. The heat of absorption in the AMP/NMP solvent decreased with increasing temperature, from approximately 90 kJ/mol CO2 at 40 °C and low loadings, to approximately 40 kJ/mol CO2 and 65 kJ/mol CO2, at 88 °C and low loadings, for the 15 wt% and 25 wt% AMP in NMP solvents, respectively. The results obtained complement our previous studies, together providing comprehensive data on the vapor–liquid equilibrium and the heat of absorption of CO2, which can be used to model the system.

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organization
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type
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publication status
published
subject
keywords
AMP, CO, Heat of absorption, Henry's constant, NMP, Solubility
in
International Journal of Greenhouse Gas Control
volume
95
article number
102952
publisher
Elsevier
external identifiers
  • scopus:85078743853
ISSN
1750-5836
DOI
10.1016/j.ijggc.2019.102952
language
English
LU publication?
yes
id
f45b68d9-f850-4676-bb62-4e079d88f32e
date added to LUP
2020-02-11 11:05:11
date last changed
2020-10-07 06:53:17
@article{f45b68d9-f850-4676-bb62-4e079d88f32e,
  abstract     = {<p>It has been suggested that non-aqueous solvents containing amines may provide alternatives to aqueous alkanolamine solvents due to the potentially lower energy requirement for the regeneration of the amine. This paper presents experimental data on the solubility of CO<sub>2</sub> and heat of absorption in the organic solvent N-methyl-2-pyrrolidone (NMP) and mixtures of 2-amino-2-methyl-1-propanol (AMP) in NMP. The solubility of CO<sub>2</sub> was found to be very low at temperatures above 70 °C, the temperature at which the AMP/NMP solvent can be regenerated. The solubility of CO<sub>2</sub> was higher at lower temperatures, particularly when precipitation of the AMP carbamate occurred. The heat of absorption in the AMP/NMP solvent decreased with increasing temperature, from approximately 90 kJ/mol CO<sub>2</sub> at 40 °C and low loadings, to approximately 40 kJ/mol CO<sub>2</sub> and 65 kJ/mol CO<sub>2</sub>, at 88 °C and low loadings, for the 15 wt% and 25 wt% AMP in NMP solvents, respectively. The results obtained complement our previous studies, together providing comprehensive data on the vapor–liquid equilibrium and the heat of absorption of CO<sub>2</sub>, which can be used to model the system.</p>},
  author       = {Karlsson, Hanna K. and Sanku, Meher G. and Svensson, Helena},
  issn         = {1750-5836},
  language     = {eng},
  publisher    = {Elsevier},
  series       = {International Journal of Greenhouse Gas Control},
  title        = {Absorption of carbon dioxide in mixtures of N-methyl-2-pyrrolidone and 2-amino-2-methyl-1-propanol},
  url          = {http://dx.doi.org/10.1016/j.ijggc.2019.102952},
  doi          = {10.1016/j.ijggc.2019.102952},
  volume       = {95},
  year         = {2020},
}