Schlagwort: Direct Air Capture

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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Hussain M. Almajed, Recep Kas, Paige Brimley, Allison M. Crow, Ana Somoza-Tornos, Bri-Mathias Hodge, Thomas E. Burdyny, Wilson A. Smith IN: ACS Energy Letters 9 (5), 2472-2483, https://doi.org/10.1021/acsenergylett.4c00807

CO₂ from carbonate-based capture solutions requires a substantial energy input. Replacing this step with (bi)carbonate electrolysis has been commonly proposed as an efficient alternative that coproduces CO/syngas. Here, the authors assess the feasibility of directly integrating air contactors with (bi)carbonate electrolyzers by leveraging process, multiphysics, microkinetic, and technoeconomic models. 

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Anatoly Rinberg, Michael J. Aziz IN: ACS ES&T Engineering, https://doi.org/10.1021/acsestengg.4c00150

Direct air capture of carbon dioxide is one approach among many proposed that is capable of offsetting hard-to-avoid emissions. In previous work, we developed the alkalinity concentration swing (ACS) method, which is driven through concentrating an alkaline solution that has been loaded with atmospheric CO₂ by desalination technologies, such as reverse osmosis or capacitive deionization. Though the ACS is promising in terms of energy usage and implementation, its absorption rate and water requirements are infeasible for a large-scale DAC process. Here, we propose an improvement on the ACS, the bicarbonate-enriched alkalinity concentration swing (BE-ACS), which selects bicarbonate ions from a stream of aqueous alkaline solution that has absorbed atmospheric CO₂. 

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Anne B. Ottenbros, Rosalie van Zelm, Jasper Simons, Mitchell K. van der Hulst, Kiane de Kleijne, Hans de Neve, Mark A. J. Huijbregts IN: Scientific Reports 14, 16549, https://doi.org/10.1038/s41598-024-66990-2

This study investigates the environmental impact of a new fast-swing solid sorbent DAC system, including CO₂ transport and storage, over its life cycle, using prospective life cycle assessment.

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Gerard Avellaneda Domene, Curran Crawford IN: Ocean Engineering 308, 118205, https://doi.org/10.1016/j.oceaneng.2024.118205

Offshore wind-powered CO₂ direct air capture coupled with deep-water, submarine basalt reservoirs has the potential to offer a reliable way to permanently store CO₂ while avoiding grid-energy and land-use competition. This paper analyzes the incorporation of a DAC system into a reference floating wind turbine (FWT) concept, the IEA 15 MW RWT atop the UMaine VolturnUS-S semi-submersible. 

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Enric Prats-Salvado, Nipun Jagtap, Nathalie Monnerie, Christian Sattler IN: Environmental Science & Technology 58 (5), 2282-2292, https://doi.org/10.1021/acs.est.3c08269

Direct air capture (DAC) of CO₂ has gained attention as a sustainable carbon source. One of the most promising technologies currently available is liquid solvent DAC (L-DAC), but the significant fraction of fossil CO₂ in the output stream hinders its utilization in carbon-neutral fuels and chemicals. This study proposes a solar-powered L-DAC approach and develops a model to assess the influence of the location and plant capacity on capture costs. The performed life cycle assessment enables the comparison of technologies based on net CO₂removal, demonstrating that solar-powered L-DAC is not only more environmentally friendly but also more cost-effective than conventional L-DAC.

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Shuangjun Li, Runkai Chen, Junyao Wang, Shuai Deng, Hui Zhou, Mengxiang Fang, Huiyan Zhang, Xiangzhou Yuan IN: npj Materials Sustainability 2, 11, https://doi.org/10.1038/s44296-024-00014-y

Solar thermal energy-assisted direct air capture is widely considered as a novel carbon-negative technical route, innovatively enabling an effective removal of CO₂ directly from ambient air. Here, an advanced concept is introduced that involves the conversion of CO₂ captured by the solar thermal energy-assisted DAC into liquid methanol, simultaneously mitigating climate change and supplying green chemicals.

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