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Synergistic direct air capture of CO2 with aqueous guanidine/amino acid solvents

Journal Article · · MRS Advances
 [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
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We report that Methylglyoxal-bis(iminoguanidine) (MGBIG) has been recently identified as a promising sorbent for direct air capture (DAC) of carbon dioxide via crystallization of guanidinium carbonate salts. In this study, the effects of aqueous amino acids and oligopeptides, such as glycine, sarcosine, serine, arginine, taurine, lysine, and glycylglycine, on the efficacy of DAC by crystallization of MGBIG carbonate have been investigated. While most of the amino acids studied were found to precipitate with MGBIG, thereby rendering the sorbent unavailable for DAC, sarcosine, the only amino acid in the series with a secondary amine group, remained soluble in the presence of MGBIG, leading to enhanced DAC compared to MGBIG alone. Specifically, for the same amount of MGBIG (5 mmol), the addition of a small amount of sarcosine to the aqueous solvent–as little as 0.5 mmol–led to extraction of six times as much CO2 from the air (4.15 mmol vs. 0.7 mmol). Thus, aqueous MGBIG and sarcosine work in synergy, offering the prospect for an effective DAC process.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1854470
Journal Information:
MRS Advances, Journal Name: MRS Advances Journal Issue: NA Vol. NA; ISSN 2059-8521
Publisher:
Materials Research Society (MRS)Copyright Statement
Country of Publication:
United States
Language:
English

References (13)

Sorbents for the Direct Capture of CO 2 from Ambient Air journal February 2020
Aqueous Sulfate Separation by Sequestration of [(SO 4 ) 2 (H 2 O) 4 ] 4− Clusters within Highly Insoluble Imine-Linked Bis-Guanidinium Crystals journal December 2015
CO2 Capture via Crystalline Hydrogen-Bonded Bicarbonate Dimers journal March 2019
Direct air capture with bis-iminoguanidines: From discovery to commercialization journal November 2021
Direct air capture of CO2 with aqueous peptides and crystalline guanidines journal April 2021
Direct Capture of CO2 from Ambient Air journal August 2016
Direct Air Capture of CO 2 with Aqueous Amino Acids and Solid Bis-iminoguanidines (BIGs) journal November 2019
Comprehensive Study of the Hydration and Dehydration Reactions of Carbon Dioxide in Aqueous Solution journal December 2009
Direct air capture of CO2 via aqueous-phase absorption and crystalline-phase release using concentrated solar power journal May 2018
Direct air capture of CO 2 via crystal engineering journal January 2021
The Solubility of Carbon Dioxide in Water at Low Pressure journal November 1991
A review of direct air capture (DAC): scaling up commercial technologies and innovating for the future journal April 2021
Direct air capture of CO 2 – topological analysis of the experimental electron density (QTAIM) of the highly insoluble carbonate salt of a 2,6-pyridine-bis(iminoguanidine), (PyBIGH 2 )(CO 3 )(H 2 O) 4 journal January 2019

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36 MATERIALS SCIENCE