Schlagwort: Direct Air Capture

Peer-reviewed Publications

Bolongaro et al. (2026): Life cycle assessment of solid calcium-looping direct air capture and its synergistic dual use for net-negative cement

Vittoria Bolongaro, David Yang Shu, Noah McQueen and André Bardow, IN: Chem Circularity, https://doi.org/10.1016/j.checc.2026.100037

Calcium-looping direct air carbon capture and storage (DACCS) is a mature technology with potential for gigatonne-scale carbon dioxide removal (CDR), yet its environmental impacts remain insufficiently quantified. Here, the authors present the first prospective life cycle assessment of large-scale calcium-looping DACCS based on primary industrial data.

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Peer-reviewed Publications

Winata et al. (2026): Investigating the Influence of Alkali Chloride Salts and Hydration on the Direct Air Capture Capacity of Polyethylenimine Films with Quartz Crystal Microbalance and Infrared Spectroscopy

Kayley Winata, Kayli Kuk, Christopher L. Soles and Avery E. Baumann, IN: Langmuir, https://doi.org/10.1021/acs.langmuir.6c00429

With carbon dioxide (CO₂) concentrations on the rise, direct air capture (DAC) technologies to remove carbon dioxide from the atmosphere are attracting increased attention. One popular approach is to use aminopolymer sorbents, such as polyethylenimine (PEI), to absorb the CO₂ and capture it through chemical reactions with the amine groups. In practice, the CO₂ capture efficiency in aminopolymer sorbents strongly depends on the relative humidity, where the theoretical CO₂ capture efficiency can change by 2-fold in going from a dry to a humid environment through the formation of either an ammonium carbamate or carbamic acid capture product, respectively. In this study, the authors utilize monovalent chloride salts with increasing cation size (LiCl, NaCl, KCl, or CsCl) to modulate water uptake and thus product formation, quantified using both gravimetric and spectroscopic methods. The authors utilize tandem quartz crystal microbalance with dissipation (QCM-D) and polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS) to decouple the individual uptake of CO₂ and H₂O from the total sorption mass.

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Peer-reviewed Publications

Agbo et al. (2026): Hybrid biophysical systems for atmospheric CO₂ capture

Peter Agbo, Joseph O Varghese, Ryan K Henning, Jacob S Kanady and Ashwin Ram, IN: Environmental Research: Energy, https://doi.org/10.1088/2515-7655/ae61f4

Negative emissions technologies will be essential for limiting anthropogenic global temperature increases to 2 °C in the later years of the 21st century. Carbonic anhydrase (CA) metalloenzymes catalyze the otherwise slow conversion of CO₂ into carbonic acid (H₂CO₃), suggesting their utility in the rapid hydration and downstream capture of dissolved CO₂ in aqueous media for a variety of CO₂ capture methods, such as thermal and pH swings and mineralization. The possibility of driving the rapid capture of CO₂ by catalyzing the CO₂ hydration bottleneck carries real potential for realizing efficient direct air capture (DAC) and direct ocean capture (DOC) systems. However, scaled application of CAs will be dependent on some way of economically sourcing the enzymes at volumes relevant to scaled DAC/DOC operations. In this perspective, the authors consider the prospect of catalyzing CO₂ hydration using a CA that is bound to the outer membrane of a cyanobacterial host, engineered constructs they call CyCAMs.

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Peer-reviewed Publications

Liu et al. (2026): Redox-decoupled electrolysis for direct air capture of CO₂

Shijie Liu, Yurou Celine Xiao, Dongha Kim, Zunmin Guo, Eloi Grignon, Yuke Li, Ian Munroe, Hang Zhang, Jiexin Zhu, Zhizheng Wu, Jonathan P. Edwards, Jinqiang Zhang, Jieyuan Liu, Panagiotis Papangelakis, Yuxuan Che, Hyeon Seok Lee, Feng Li, Prasad V. Sarma, Qiyou Wang, Cai Wang, Todd Scheidt, Rui Kai Miao, Dwight Seferos, Yi Xu and David Sinton, IN: Nature Chemical Engineering, https://doi.org/10.1038/s44286-026-00391-2

Electrochemical direct air capture (eDAC) leverages renewable electricity to remove atmospheric carbon dioxide (CO₂), offering an alternative to carbon-intensive thermal methods. However, existing eDAC systems achieve high energy efficiency only when producing a dilute hydroxide stream (pH ≈ 13) that is incompatible with current air contactors. Attempts to generate more concentrated capture solutions encounter the fundamental limitation of proton and hydroxide recombination, lowering the current efficiency and increasing energy requirements. Here the authors present a decoupled strategy whereby CO₂ liberation and sorbent regeneration are spatially separated, achieving high current and energy efficiency via redox-decoupled electrolysis. They tuned the redox mediator and synthesized a cation exchange membrane to ensure fast reaction kinetics, a low operating voltage and stability.

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Peer-reviewed Publications

Keeley et al. (2026): Scalable carbon solutions: life cycle insights and public willingness to adopt direct air capture and utilization systems

Alexander R. Keeley, Andrew J. Chapman, Sunbin Yoo, Kenichi Kurita, Junya Kumagai, Dyah Ika Rinawati, Tianhui Fan and Shunsuke Managi, IN: Springer Nature, https://doi.org/10.1007/s10018-026-00473-8

Reducing the concentration of carbon dioxide (CO₂) in the atmosphere to combat climate change is a global challenge. Direct air capture (DAC) incorporates a new set of technologies that directly remove CO₂ from the air; therefore, DAC can address emissions from any source. This paper begins by reviewing the literature on negative emission technologies (NET) to summarize the most recent technological developments. Further, a life cycle assessment (LCA) on one of the most recently developed technologies, the direct air capture and utilization (DAC-U) system is undertaken. DAC-U systems, like photovoltaic systems, can be installed in various locations, including homes, offices, and industrial settings, resulting in a compact, on-site system that may be suitable for modular and distributed deployment. Based on the LCA results, this article presents the CO₂ capture and reduction potential of the DAC-U system, with a focus on installations in households, and examines the willingness to adopt the system in Japan.

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Peer-reviewed Publications

Agarwal et al. (2026): Direct Air Capture (DAC) Technologies and Subsurface Integration: A Comprehensive Technical Review

Akshit Agarwal, Yousef Al-Enizi and Cenk Temizel, IN: Offshore Technology Conference, https://doi.org/10.2118/232545-MS

Direct air capture (DAC) is one of the most promising negative emissions technologies (NETs), and is considered a key enabler to meet global climate mitigation goals and facilitate the transition to a low-carbon economy. Therefore, this review aims to provide an overview of the present state-of-the-art concerning DAC technologies, sorbent materials, energy systems, and subsurface storage techniques for long-term CO₂ sequestration. The DAC technologies can be classified into two main types, namely solid-sorbent based DAC and liquid- solvent based DAC systems. These two DAC technologies are compared and evaluated based on their technical features and performance parameters, and the challenges that arise during the application of these technologies are discussed. Additionally, this review focuses on the subsurface storage of captured CO₂ in deep saline aquifers, analyzing the processes of CO₂ transport and trapping, and discussing monitoring strategies and technologies. Energy consumption is considered the major cost factor of DAC technologies; therefore, this review examines possible ways to improve energy efficiency and integrate renewable energy sources.Furthermore, techno-economic evaluations show that capture costs of DAC technologies range from $200 to $600/ton CO₂, but costs may decrease by a factor of less than three due to the development and scale-up of new technologies. As part of practical applications, synergies between DAC technologies and enhanced oil recovery (EOR) processes in oil fields and the reuse of abandoned oil and gas reservoirs will be examined.

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Peer-reviewed Publications

Amiri et al. (2026): Techno-economic feasibility and life cycle carbon assessment of an integrated bioenergy driven direct air capture for sustainable hydrogen carrier production

Mahmoud Kiannejad Amiri, Mohammad Moosazadeh and ChangKyoo Yoo, IN: Energy, https://doi.org/10.1016/j.energy.2026.141333

The growing need for carbon-neutral chemical production requires integrated solutions that couple direct air capture (DAC) with renewable process heat and hydrogen generation. This study proposes and evaluates a Bioenergy-Driven Direct Air Capture (Bio-DAC) system that integrates biomass gasification, liquid-sorbent DAC, and solid-oxide electrolysis cells for the sustainable liquid hydrogen-carriers production. A comprehensive framework combining process simulation, pinch analysis, techno-economic analysis, and life cycle carbon assessment was employed to optimize system efficiency, profitability, and environmental performance.

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Peer-reviewed Publications

Nishiura et al. (2026): Development of a computable general equilibrium model representing direct air capture and carbon dioxide utilization

Osamu Nishiura, Shinichiro Fujimori and Ken Oshiro, IN: Energy and Climate Change, https://doi.org/10.1016/j.egycc.2026.100250

The establishment of stringent climate goals resulted in the development of various technologies contributing to climate change mitigation. While most of them were developed, at least partially, for other purposes, carbon dioxide removal (CDR) and carbon dioxide capture, utilization and storage (CCUS) are the only technologies developed solely for the purpose of mitigation. Direct air capture (DAC) contributes to climate-change mitigation through CDR and the supply of low-emission fuels. Integrated assessment models (IAMs) have incorporated the latest mitigation technologies, supporting technology development and deployment as well as climate policy formulation. Most scenario studies targeting DAC have applied IAMs with partial equilibrium models at their core. This study developed a computable general equilibrium (CGE) model capable of analyzing mitigation scenarios considering DAC-related technologies.

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Peer-reviewed Publications

Im et al. (2026): Integration of Direct Air Capture with the Chlor–Alkali Process for CO₂ Mineralization: Techno-Economic and Life Cycle Assessment

Minseok Im, Konan Alain Cedric Nzisso, Inhye Kim, Cheol Hun Park and Sunghyun Cho, IN: Energy, https://doi.org/10.1016/j.energy.2026.141346

Although direct air capture (DAC) is a promising negative-emission technology, its widespread deployment remains hindered by high energy requirements and unfavorable economics. This paper presents a novel configuration integrating DAC with a chlor–alkali (CA) process referred to as the CADAC system. Key innovation involves directly supplying Ca(OH)₂ from the CA process to the DAC unit, eliminating the energy-intensive calciner–slaker loop required in conventional DAC configurations.

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Peer-reviewed Publications

Almajed et al. (2026): Quantifying capital-energy trade-offs in bipolar membrane electrodialysis for atmospheric and oceanic carbon removal

Hussain M. Almajed, Bri-Mathias Hodge and Wilson A. Smith, IN: Joule, https://doi.org/10.1016/j.joule.2026.04.008

Coupling bipolar membrane electrodialysis (BPMED) with direct air capture (DAC) and direct ocean capture (DOC) presents promising carbon removal pathways. The authors develop, validate, and integrate process and techno-economic models to assess this integration under variable power scenarios.

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