Determination of the regeneration energy of direct air capture solvents/sorbents using calorimetric methods

Abishek Kasturi; Gyoung Gug Jang; Diāna Stamberga; Radu Custelcean; Sotira Yiacoumi; Costas Tsouris

doi:10.1016/j.seppur.2023.123154

Determination of the regeneration energy of direct air capture solvents/sorbents using calorimetric methods

Abishek Kasturi, Gyoung Gug Jang, Diāna Stamberga, Radu Custelcean, Sotira Yiacoumi, Costas Tsouris

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

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Abstract

Regeneration energy and recyclability are important parameters that dictate the viability of a CO₂ direct air capture (DAC) process. In this study, differential scanning calorimetry (DSC) is used in conjunction with thermogravimetric analysis (TGA) and Fourier Transform Infrared Spectroscopy (FTIR) to evaluate the regeneration energy required for CO₂-loaded 3 M aqueous potassium sarcosinate (K-SAR) solvent and crystalline methyl-glyoxal-bisiminoguanidine (MGBIG) sorbent. Based on calorimetric measurements, for aqueous K-SAR, the sensible heat amounts to 1.5 GJ/tCO₂ and the enthalpy of desorption is estimated at 3.68 GJ/tCO₂. The total energy of regeneration will also include the enthalpy of solvent vaporization, which will depend on the thermodynamic conditions and the level of regeneration. For MGBIG, the total regeneration energy required was measured at approximately 7.0 GJ/tCO₂. FTIR measurements were used to observe CO₂ and H₂O release during the thermal regeneration process. For K-SAR, CO₂ release is seen to take place at temperatures greater than 80 °C and, for MGBIG, the CO₂ release takes place at temperatures greater than 100 °C. The moderate temperatures required for K-SAR and MGBIG regenerations compared to other DAC solvents/sorbents suggest that low-cost sources of heat, such as geothermal heat, could potentially be used for regeneration to drive down the cost of direct air capture.

Original language	English
Article number	123154
Journal	Separation and Purification Technology
Volume	310
DOIs	https://doi.org/10.1016/j.seppur.2023.123154
State	Published - Apr 1 2023

Funding

This research was supported by the U.S. Department of Energy, Office of Technology Transitions, through a Technology Commercialization Fund supported by the Office of Fossil Energy and Carbon Management. The study was conducted at the Georgia Institute of Technology and the Oak Ridge National Laboratory (ORNL). ORNL is managed by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Keywords

Amino acids
Carbon dioxide removal
Direct air capture
Guanidine
Regeneration energy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.seppur.2023.123154

Cite this

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title = "Determination of the regeneration energy of direct air capture solvents/sorbents using calorimetric methods",

abstract = "Regeneration energy and recyclability are important parameters that dictate the viability of a CO₂ direct air capture (DAC) process. In this study, differential scanning calorimetry (DSC) is used in conjunction with thermogravimetric analysis (TGA) and Fourier Transform Infrared Spectroscopy (FTIR) to evaluate the regeneration energy required for CO2-loaded 3 M aqueous potassium sarcosinate (K-SAR) solvent and crystalline methyl-glyoxal-bisiminoguanidine (MGBIG) sorbent. Based on calorimetric measurements, for aqueous K-SAR, the sensible heat amounts to 1.5 GJ/tCO2 and the enthalpy of desorption is estimated at 3.68 GJ/tCO2. The total energy of regeneration will also include the enthalpy of solvent vaporization, which will depend on the thermodynamic conditions and the level of regeneration. For MGBIG, the total regeneration energy required was measured at approximately 7.0 GJ/tCO2. FTIR measurements were used to observe CO₂ and H2O release during the thermal regeneration process. For K-SAR, CO₂ release is seen to take place at temperatures greater than 80 °C and, for MGBIG, the CO₂ release takes place at temperatures greater than 100 °C. The moderate temperatures required for K-SAR and MGBIG regenerations compared to other DAC solvents/sorbents suggest that low-cost sources of heat, such as geothermal heat, could potentially be used for regeneration to drive down the cost of direct air capture.",

keywords = "Amino acids, Carbon dioxide removal, Direct air capture, Guanidine, Regeneration energy",

author = "Abishek Kasturi and {Gug Jang}, Gyoung and Diāna Stamberga and Radu Custelcean and Sotira Yiacoumi and Costas Tsouris",

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N2 - Regeneration energy and recyclability are important parameters that dictate the viability of a CO₂ direct air capture (DAC) process. In this study, differential scanning calorimetry (DSC) is used in conjunction with thermogravimetric analysis (TGA) and Fourier Transform Infrared Spectroscopy (FTIR) to evaluate the regeneration energy required for CO2-loaded 3 M aqueous potassium sarcosinate (K-SAR) solvent and crystalline methyl-glyoxal-bisiminoguanidine (MGBIG) sorbent. Based on calorimetric measurements, for aqueous K-SAR, the sensible heat amounts to 1.5 GJ/tCO2 and the enthalpy of desorption is estimated at 3.68 GJ/tCO2. The total energy of regeneration will also include the enthalpy of solvent vaporization, which will depend on the thermodynamic conditions and the level of regeneration. For MGBIG, the total regeneration energy required was measured at approximately 7.0 GJ/tCO2. FTIR measurements were used to observe CO₂ and H2O release during the thermal regeneration process. For K-SAR, CO₂ release is seen to take place at temperatures greater than 80 °C and, for MGBIG, the CO₂ release takes place at temperatures greater than 100 °C. The moderate temperatures required for K-SAR and MGBIG regenerations compared to other DAC solvents/sorbents suggest that low-cost sources of heat, such as geothermal heat, could potentially be used for regeneration to drive down the cost of direct air capture.

AB - Regeneration energy and recyclability are important parameters that dictate the viability of a CO₂ direct air capture (DAC) process. In this study, differential scanning calorimetry (DSC) is used in conjunction with thermogravimetric analysis (TGA) and Fourier Transform Infrared Spectroscopy (FTIR) to evaluate the regeneration energy required for CO2-loaded 3 M aqueous potassium sarcosinate (K-SAR) solvent and crystalline methyl-glyoxal-bisiminoguanidine (MGBIG) sorbent. Based on calorimetric measurements, for aqueous K-SAR, the sensible heat amounts to 1.5 GJ/tCO2 and the enthalpy of desorption is estimated at 3.68 GJ/tCO2. The total energy of regeneration will also include the enthalpy of solvent vaporization, which will depend on the thermodynamic conditions and the level of regeneration. For MGBIG, the total regeneration energy required was measured at approximately 7.0 GJ/tCO2. FTIR measurements were used to observe CO₂ and H2O release during the thermal regeneration process. For K-SAR, CO₂ release is seen to take place at temperatures greater than 80 °C and, for MGBIG, the CO₂ release takes place at temperatures greater than 100 °C. The moderate temperatures required for K-SAR and MGBIG regenerations compared to other DAC solvents/sorbents suggest that low-cost sources of heat, such as geothermal heat, could potentially be used for regeneration to drive down the cost of direct air capture.

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Determination of the regeneration energy of direct air capture solvents/sorbents using calorimetric methods

Abstract

Funding

Keywords

UN SDGs

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