Thermal degradation of amino acid salts in CO2 capture

Quanzhen Huang; Saloni Bhatnagar; Joseph E. Remias; John P. Selegue; Kunlei Liu

doi:10.1016/j.ijggc.2013.09.003

Thermal degradation of amino acid salts in CO₂ capture

Quanzhen Huang
, Saloni Bhatnagar
, Joseph E. Remias
, John P. Selegue
, Kunlei Liu

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

The resistance of amine-based CO₂ capture solutions to thermal degradation is a critical characteristic that helps to de termine their potential for use as a post-combustion CO₂ capture solvent. In this research, sodium salts of glycine, sarcosine, alanine and β-alanine were thermally degraded at 125°C, 135°C and 145°C, respectively, to discover the structural reasons for their thermal stability. These four amino acids have enhanced thermal degradation rates compared to reference monoethanolamine (MEA) solvent. The stability order for amino acid salts tested to date is: sarcosinate>alaninate>β-alaninate. Steric hindrance at the amine group plays a positive role in protecting the amino acid against degradation. Calculated activation energies for the degradation processes are lower than that of MEA. β-Alaninate (β-Ala) thermal degradation generates β-Ala dimer (major degradation product), β-Ala dimer carbamate and tetrahydro-1,3-oxazin-6-one. The relative yields of these three β-alanine degradation routes are discussed.

Original language	English
Pages (from-to)	243-250
Number of pages	8
Journal	International Journal of Greenhouse Gas Control
Volume	19
DOIs	https://doi.org/10.1016/j.ijggc.2013.09.003
State	Published - Nov 2013

Bibliographical note

Funding Information:
This work was supported by the Carbon Management Research Group (CMRG) with members, including; Duke Energy, East Kentucky Power Cooperative (EKPC), Electric Power Research Institute (EPRI), Kentucky Department of Energy Development and Independence (KY-DEDI), Kentucky Power (AEP), and LG&E and KU Energy.

Funding

This work was supported by the Carbon Management Research Group (CMRG) with members, including; Duke Energy, East Kentucky Power Cooperative (EKPC), Electric Power Research Institute (EPRI), Kentucky Department of Energy Development and Independence (KY-DEDI), Kentucky Power (AEP), and LG&E and KU Energy.

Funders
Kentucky Energy and Environment Cabinet Department for Energy Development
American Electric Power
Electric Power Research Institute, Louisville Gas & Electric
East Kentucky Power Cooperative
KU Energy LLC

Keywords

Activation energy
Amino acid
Post-combustion
Thermal degradation

ASJC Scopus subject areas

Pollution
General Energy
Management, Monitoring, Policy and Law
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.ijggc.2013.09.003

Cite this

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title = "Thermal degradation of amino acid salts in CO2 capture",

abstract = "The resistance of amine-based CO2 capture solutions to thermal degradation is a critical characteristic that helps to de termine their potential for use as a post-combustion CO2 capture solvent. In this research, sodium salts of glycine, sarcosine, alanine and β-alanine were thermally degraded at 125°C, 135°C and 145°C, respectively, to discover the structural reasons for their thermal stability. These four amino acids have enhanced thermal degradation rates compared to reference monoethanolamine (MEA) solvent. The stability order for amino acid salts tested to date is: sarcosinate>alaninate>β-alaninate. Steric hindrance at the amine group plays a positive role in protecting the amino acid against degradation. Calculated activation energies for the degradation processes are lower than that of MEA. β-Alaninate (β-Ala) thermal degradation generates β-Ala dimer (major degradation product), β-Ala dimer carbamate and tetrahydro-1,3-oxazin-6-one. The relative yields of these three β-alanine degradation routes are discussed.",

keywords = "Activation energy, Amino acid, Post-combustion, Thermal degradation",

author = "Quanzhen Huang and Saloni Bhatnagar and Remias, \{Joseph E.\} and Selegue, \{John P.\} and Kunlei Liu",

note = "Funding Information: This work was supported by the Carbon Management Research Group (CMRG) with members, including; Duke Energy, East Kentucky Power Cooperative (EKPC), Electric Power Research Institute (EPRI), Kentucky Department of Energy Development and Independence (KY-DEDI), Kentucky Power (AEP), and LG\&E and KU Energy. ",

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doi = "10.1016/j.ijggc.2013.09.003",

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AU - Huang, Quanzhen

AU - Bhatnagar, Saloni

AU - Remias, Joseph E.

AU - Selegue, John P.

AU - Liu, Kunlei

N1 - Funding Information: This work was supported by the Carbon Management Research Group (CMRG) with members, including; Duke Energy, East Kentucky Power Cooperative (EKPC), Electric Power Research Institute (EPRI), Kentucky Department of Energy Development and Independence (KY-DEDI), Kentucky Power (AEP), and LG&E and KU Energy.

PY - 2013/11

Y1 - 2013/11

N2 - The resistance of amine-based CO2 capture solutions to thermal degradation is a critical characteristic that helps to de termine their potential for use as a post-combustion CO2 capture solvent. In this research, sodium salts of glycine, sarcosine, alanine and β-alanine were thermally degraded at 125°C, 135°C and 145°C, respectively, to discover the structural reasons for their thermal stability. These four amino acids have enhanced thermal degradation rates compared to reference monoethanolamine (MEA) solvent. The stability order for amino acid salts tested to date is: sarcosinate>alaninate>β-alaninate. Steric hindrance at the amine group plays a positive role in protecting the amino acid against degradation. Calculated activation energies for the degradation processes are lower than that of MEA. β-Alaninate (β-Ala) thermal degradation generates β-Ala dimer (major degradation product), β-Ala dimer carbamate and tetrahydro-1,3-oxazin-6-one. The relative yields of these three β-alanine degradation routes are discussed.

AB - The resistance of amine-based CO2 capture solutions to thermal degradation is a critical characteristic that helps to de termine their potential for use as a post-combustion CO2 capture solvent. In this research, sodium salts of glycine, sarcosine, alanine and β-alanine were thermally degraded at 125°C, 135°C and 145°C, respectively, to discover the structural reasons for their thermal stability. These four amino acids have enhanced thermal degradation rates compared to reference monoethanolamine (MEA) solvent. The stability order for amino acid salts tested to date is: sarcosinate>alaninate>β-alaninate. Steric hindrance at the amine group plays a positive role in protecting the amino acid against degradation. Calculated activation energies for the degradation processes are lower than that of MEA. β-Alaninate (β-Ala) thermal degradation generates β-Ala dimer (major degradation product), β-Ala dimer carbamate and tetrahydro-1,3-oxazin-6-one. The relative yields of these three β-alanine degradation routes are discussed.

KW - Activation energy

KW - Amino acid

KW - Post-combustion

KW - Thermal degradation

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