Tag: Direct Air Capture

Dong et al. (2025): Direct air capture of CO2 using bi-amines-functionlized hierarchical mesoporous silica: Effects of organic amine loading, moisture and temperature

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

LINK

Liu et al. (2024): Direct air capture of CO2 using biochar prepared from sewage sludge: Adsorption capacity and kinetics

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.

LINK

Almajed et al. (2024): Closing the Loop: Unexamined Performance Trade-Offs of Integrating Direct Air Capture with (Bi)carbonate Electrolysis

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. 

LINK

Rinberg & Aziz (2024): Bicarbonate-Carbonate Selectivity through Nanofiltration for Direct Air Capture of Carbon Dioxide

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

LINK

Nature – Ottenbros et al. (2024): Prospective environmental burdens and benefits of fast-swing direct air carbon capture and storage

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.

LINK

Domene & Crawford (2024): Dynamic analysis of a floating wind turbine platform with on-board CO2 direct air capture

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. 

LINK

Hu et al. (2024): Assessing the future impact of 12 direct air capture technologies

Yongxin Hu, Rafiqul Gani, Kai Sundmacher, Teng Zhou IN: Chemical Engineering Science, 298, https://doi.org/10.1016/j.ces.2024.120423

This article conducts a comparative analysis of the CO2 emissions of 12 state-of-the-art DAC technologies. The evaluations consider regional (EU, USA, and China) and temporal (years 2023, 2030, and 2050) energy supply variations.

LINK

Prats-Salvado et al. (2024): Solar-Powered Direct Air Capture: Techno-Economic and Environmental Assessment

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.

LINK

Nature – Li et al. (2024): Solar thermal energy-assisted direct capture of CO2 from ambient air for methanol synthesis

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.

LINK

Satter et al. (2024): Reactive direct air capture of CO2 to C–C coupled products using multifunctional materials

Shazia Sharmin Satter, Johnny Saavedra Lopez, Michael L. Hubbard, Yuan Jiang, Robert A. Dagle, Jotheeswari Kothandaraman IN: Green Chemistry, https://doi.org/10.1039/D4GC01244E

Current direct air capture approaches require a significant amount of energy for heating CO2-sorbed materials for regeneration and for compressing CO2 for transportation purposes. Rationally designing materials offering both capture and conversion functionalities could enable more energy and cost-efficient DAC and conversion. A single sorbent-catalytic (non-noble metal) material for the Integrated Direct Air Capture and CATalytic (iDAC-CAT) conversion of captured CO2 into value-added products was developed.

LINK