{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T03:59:03Z","timestamp":1785470343054,"version":"3.56.0"},"reference-count":52,"publisher":"American Chemical Society (ACS)","issue":"23","license":[{"start":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T00:00:00Z","timestamp":1780531200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100023964","name":"Johnson Matthey","doi-asserted-by":"publisher","award":["NA"],"award-info":[{"award-number":["NA"]}],"id":[{"id":"10.13039\/501100023964","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,6,17]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Anthropogenic carbon dioxide emissions remain a critical driver of climate change, necessitating the development of efficient carbon capture technologies. While aqueous amines are widely used, they suffer from high regeneration energies and solvent degradation. Here, we report a nonaqueous, cooperative CO2 absorption system using 1-methylpiperazine (MPZ) dissolved in a family of aromatic additives. Among these, the formulation with 2\u2032-hydroxyacetophenone (2\u2032HAP) exhibited the best overall performance, with a stepped sorption isotherm indicating cooperative absorption and a CO2:MPZ stoichiometry of up to 0.93 at moderate pressures (\u223c163 kPa) without the addition of water. While other structurally related additives, including acetophenone (AP), 2\u2032-methoxyacetophenone (2\u2032MAP), and 1,4-diisopropylbenzene (DIPB), also enabled high uptake capacities (absorbed CO2:MPZ stoichiometries up to \u223c0.85), the stepped behavior enables enhanced working capacity with reduced temperature differentials, offering potential energy savings in temperature-swing absorption processes. Measurements of performance with different additives including acetophenone isomers and phenolic analogs revealed that CO2 uptake and isotherm shape are governed by solvent acidity, carbonyl presence, and the ability to stabilize carbamic acid intermediates, perhaps through hydrophobic interactions. Equilibrium network modeling supported the proposed mechanism, illustrating how additive-amine interactions shift key equilibria to enable stepped isotherm behavior. Control experiments with monoethanolamine (MEA) and morpholine (MP) underscored the importance of the diamine nature of MPZ in facilitating cooperative uptake. Breakthrough experiments confirmed the system\u2019s robust performance across varying CO2 concentrations (4.5\u201325%). This work provides mechanistic insights into additive-amine cooperativity and highlights MPZ-based nonaqueous systems as promising candidates for energy-efficient CO2 capture.<\/jats:p>","DOI":"10.1021\/jacs.6c06590","type":"journal-article","created":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T06:55:50Z","timestamp":1780556150000},"page":"24430-24440","source":"Crossref","is-referenced-by-count":0,"title":["Liquid-Phase\nCO\n                    <b>2<\/b>\n                    Capture by\na Nonaqueous Cooperative Absorption Mechanism"],"prefix":"10.1021","volume":"148","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8143-4019","authenticated-orcid":true,"given":"Lu","family":"Lu","sequence":"first","affiliation":[{"name":"Georgia Institute of Technology , , , ,","place":["Atlanta, Georgia, United States, 30332"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-1313-0146","authenticated-orcid":true,"given":"Ankana","family":"Roy","sequence":"additional","affiliation":[{"name":"Georgia Institute of Technology , , , ,","place":["Atlanta, Georgia, United States, 30332"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3334-1691","authenticated-orcid":true,"given":"Saptarshi","family":"Chatterjee","sequence":"additional","affiliation":[{"name":"Virginia Tech , , , ,","place":["Blacksburg, Virginia, United States, 24061"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen","family":"Schuyten","sequence":"additional","affiliation":[{"name":"Johnson Matthey Process Technologies Inc. , , ,","place":["Savannah, Georgia, United States, 31408"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. G.","family":"Finn","sequence":"additional","affiliation":[{"name":"Georgia Institute of Technology , , , ,","place":["Atlanta, Georgia, United States, 30332"]},{"name":"Virginia Tech , , , ,","place":["Blacksburg, Virginia, United States, 24061"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryan P.","family":"Lively","sequence":"additional","affiliation":[{"name":"Georgia Institute of Technology , , , ,","place":["Atlanta, Georgia, United States, 30332"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,6,4]]},"reference":[{"key":"2026073023191371400_cit1","volume-title":"Special\nReport on Carbon Dioxide Capture and Storage","author":"IPCC.","year":"2005"},{"key":"2026073023191371400_cit2","doi-asserted-by":"publisher","first-page":"1599","DOI":"10.1126\/science.1181637","article-title":"Carbon Capture\nand Sequestration","volume":"325","author":"Chu","year":"2009","journal-title":"Science"},{"key":"2026073023191371400_cit3","volume-title":"Climate Change 2014: synthesis Report. Contribution of Working\nGroups I, II and III to the Fifth Assessment Report of the Intergovernmental\nPanel on Climate Change","author":"IPCC.","year":"2014"},{"key":"2026073023191371400_cit4","doi-asserted-by":"publisher","first-page":"472","DOI":"10.1021\/acs.accounts.6b00479","article-title":"The Holy Grail:\nChemistry Enabling an Economically\nViable CO2 Capture, Utilization, and Storage Strategy","volume":"50","author":"Senftle","year":"2017","journal-title":"Acc. Chem. Res."},{"key":"2026073023191371400_cit5","doi-asserted-by":"publisher","first-page":"116840","DOI":"10.1016\/j.enconman.2023.116840","article-title":"Blue hydrogen:\nCurrent\nstatus and future technologies","volume":"283","author":"AlHumaidan","year":"2023","journal-title":"Energy Convers.\nManage."},{"key":"2026073023191371400_cit6","doi-asserted-by":"publisher","first-page":"100996","DOI":"10.1016\/j.pecs.2022.100996","article-title":"Green, turquoise,\nblue, or grey? Environmentally friendly\nhydrogen production in transforming energy systems","volume":"90","author":"Hermesmann","year":"2022","journal-title":"Prog. Energy Combust. Sci."},{"key":"2026073023191371400_cit7","doi-asserted-by":"publisher","first-page":"121622","DOI":"10.1016\/j.apenergy.2023.121622","article-title":"Carbon capture in blue hydrogen production\nis not where\nit is supposed to be-Evaluating the gap between practical experience\nand literature estimates","volume":"349","author":"Riemer","year":"2023","journal-title":"Appl. Energy"},{"key":"2026073023191371400_cit8","doi-asserted-by":"publisher","first-page":"100003","DOI":"10.1016\/j.ccst.2021.100003","article-title":"Sorption-enhanced steam\nmethane reforming for combined CO2 capture\nand hydrogen production: a state-of-the-art review","volume":"1","author":"Soltani","year":"2021","journal-title":"Carbon Capture Sci. 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