Tag: Direct Air Capture

Wenzhe Yan, Jing Hou, Tao Yan, Zhikun Liu and Peng Kang IN: ACS Applied Materials & Interfaces, https://doi.org/10.1021/acsami.5c01647

In this work, chromium-based DM was functionalized via a two-step postsynthetic modification with ethylenediamine (EDA), tris(2-aminoethyl)amine (TAEA), and polyethylene-polyamines (PEPA). Characterization by Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (PXRD), and scanning electron microscopy (SEM) confirmed successful synthesis and structural integrity.

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Dia Milani, Haftom Weldekidan, Wilson Gardner, Phillip Fawell, Robbie McDonald, Paul Feron, Michael Rae, Geoff Drewer, Graeme Puxty, Nouman Mirza and Phil Green IN: Cleaner Engineering and Technology, https://doi.org/10.1016/j.clet.2025.100974

This study proposes a novel process integrating concentrated solar power (CSP), accelerated mineral carbonation (AMC), and direct air capture (DAC) technologies to reduce such wastes and emissions. A closed-loop Rankine cycle generating 10 MW_e electric power for a hypothetical Australian nickel mine site case-study is simulated in Aspen Plus. High temperature steam is first used in the AMC heat exchanger (AMC-HX) to provide the enthalpy for AMC before expanding in the turbine to produce the design electricity. The turbine’s low-enthalpy exit steam is then used in the DAC heat exchanger (DAC-HX) as a final heat sink before condensation and pumping back to the boiler. The boiler’s thermal duty is supplied by a solar central receiver system (CRS) complemented by a 10-h thermal energy storage system. For the nominal CRS design and energy balance, a net of 5.78 MJ heat per kg of carbonated product is calculated, 10 MW_e electricity for mining beneficiation is maintained, while 10.7 MJ per kg of CO₂ produced in DAC is also provisioned.

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Calin-Cristian Cormos IN: Journal of Environmental Chemical Engineering, DOI: 10.1016/j.jece.2025.116601

The author evaluates an innovative energy- and cost-efficient potassium – calcium looping cycle as a promising Direct Air CO₂ Capture (DAC) technology. The potassium – calcium looping cycle is a reactive system which captures CO₂ by a combination of liquid solvent and solid sorbent. The high temperature energy recovery capability of this system makes it very promising for an energy- and cost-efficient CO₂ capture. To reduce the environmental impact, various renewable energy sources can be used to cover the required thermal duty, especially, the heat demand of the calcination reactor. The two investigated DAC concepts (fuelled by solar or biomass) are set to capture 1 Mt/y CO₂ from air with about 75 % capture rate. The conceptual design, detailed process modelling and validation, followed by overall energy optimization, done by thermal integration analysis, were used to assess the key techno-economic and environmental performance indicators.

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Robin Koch, Roland Dittmeyer IN: Sec. Carbon Dioxide Removal DOI: 10.3389/fclim.2025.1558396

The authors study deals with the question which direct air capture technologies currently have the biggest potential for reaching a gigaton scale of capture capacity. Technologies that were examined are Alkaline Gas Washing, Temperature Vacuum Swing Adsorption, Electro Swing Adsorption, and Accelerated Weathering Carbon Capture. Using a multi-criteria decision-making model (PROMETHEE II) and cost predictions based on learning by doing were used to determine which technology has the highest potential.

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Sayan Kar, Dongseok Kim, Ariffin Bin Mohamad Annuar, Bidyut Bikash Sarma, Michael Stanton, Erwin Lam, Subhajit Bhattacharjee, Suvendu Karak, 
Heather F. Greer, Erwin Reisner IN: Nature Energy, https://doi.org/10.1038/s41560-025-01714-y

Direct air capture is an emerging technology to decrease atmospheric CO₂ levels, but it is currently costly and the long-term consequences of CO₂ storage are uncertain. An alternative approach is to utilize atmospheric CO₂ on-site to produce value-added renewable fuels, but current CO₂ utilization technologies predominantly require a concentrated CO₂ feed or high temperature. Here we report a gas-phase dual-bed direct air carbon capture and utilization flow reactor that produces syngas (CO + H₂) through on-site utilization of air-captured CO₂ using light without requiring high temperature or pressure. 

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Rui-Long Wang, Ming-Jia Li, Gregory J.O. Martin, Sandra E. Kentish IN: Algal Research 85, 103875, https://doi.org/10.1016/j.algal.2024.103875

In this study, a novel membrane gas sparger incorporating a carbonic anhydrase coated electrospun polysulfone membrane is proposed, to enhance the CO₂ sequestration rate from atmospheric air into photobioreactors and open raceway ponds. 

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Karlie Bach, Eduard Garrido Ribó, Jacob S. Hirschi, Zhiwei Mao, Makenzie T. Nord, Lev N. Zakharov, Konstantinos A. Goulas, Tim J. Zuehlsdorff, May Nyman IN: Chemistry of Materials, https://doi.org/10.1021/acs.chemmater.4c01795

Materials chemists play a strategic role in achieving ambitious global climate goals, including removing legacy CO₂ via direct air capture (DAC). Innovating diverse DAC materials will enable their effective use in varying conditions and improve our understanding of CO₂ capture mechanisms. In our current contribution, we have synthesized a family of homoleptic alkali tetraperoxotitanate materials and studied their DAC reactivity.

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Noah McQueen, David Drennan IN: Frontiers in Climate 6, 1415642, https://doi.org/10.3389/fclim.2024.1415642

In this study, the authors discuss Heirloom’s approach to DAC, which uses naturally occurring minerals, namely, calcium carbonate (CaCO₃), in a cyclic process that leverages warehouse automation systems previously developed for large warehouses. The integration of DAC with warehouse automation systems unlocks a degree of manufacturability, scalability, operational efficiency, and financial viability. For successful scaling, DAC technologies and project developers must think through key scalability constraints, including modularity, constructability, supply chains, and leveraging existing infrastructure.

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Xiaolong Dong, Shengjie Zhu, Lei Chen, Xiangping Li, Yaqing Zhang, Tiantian Jiao, Ruochen Zhang, Haili Niu, Jianguang Zhang, Wenrui Zhang, Peng Liang IN: Separation and Purification Technology 355/A, 129647, https://doi.org/10.1016/j.seppur.2024.129647

With the rapid increase of carbon dioxide in the atmosphere, it has become urgent to reduce CO₂ emissions. It is imperative to develop low-cost and high-efficiency CO₂ direct air capture adsorbents. In this research, dual mesoporous silica carriers for direct air capture of CO₂ were synthesized and evaluated regarding their performance in absorbing CO₂. 

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Jun Liu, Zefan Wang, Chenyang Liang, Kehao Fang, Shaokang Li, Xinwei Guo, Tao Wang, Mengxiang Fang IN: Science of The Total Environment 948, 174887, https://doi.org/10.1016/j.scitotenv.2024.174887

As an emerging carbon-negative emission technology, carbon dioxide capture from the air is an essential safeguard for alleviating global warming. Sludge-activated carbon with excellent mesoporous structure is a potential material for CO₂ capture. In this paper, the amino modified sewage sludge materials were used to prepare the porous CO₂ adsorbent from air.

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