Tag: Direct Air Capture

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.

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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.

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An et al. (2024): A multifunctional rooftop unit for direct air capture

Keju An, Jamieson Brechtl, Stephen Kowalski, Cheng-Min Yang, Michelle K. Kidder, Costas Tsouris, Christopher Janke, Meghan Lamm, Katie Copenhaver, Josh Thompson, Tugba Turnaoglu, Brian Fricke, Kai Li, Xin Sun, Kashif Nawaz IN: Environmental Science Advances, https://doi.org/10.1039/D4VA00013G

Currently, DAC technologies are deployed mainly in centralized systems and require extensive infrastructure and initial capital cost. A potential solution is to utilize existing infrastructure for DAC. In this study, the authors propose a distributed DAC system that utilizes existing commercial rooftop heating and air conditioning units to capture CO2 from the air.

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Brazzola et al. (2024): Utilizing CO2 as a strategy to scale up direct air capture may face fewer short-term barriers than directly storing CO2

Nicoletta Brazzola, Christian Moretti, Katrin Sievert, Anthony Patt, Johan Lilliestam IN: Environmental Research Letters 19 (5), 054037, https://doi.org/10.1088/1748-9326/ad3b1f

Direct air capture is increasingly recognized as a necessary puzzle piece to achieve the Paris climate targets. However, the current high cost and energy intensity of DAC act as a barrier. Short-term strategies for initial deployment, technology improvement, and cost reduction are needed to enable large-scale deployment. The authors assess and compare two near-term pathways leading to the same installed DAC capacity and thus yielding the same cost reductions: its combination with CO2 storage as direct air carbon capture and storage, or its deployment for CO2 utilization as direct air carbon capture and utilization e.g. for synthetic fuels, chemicals, and materials.

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López et al. (2024): Indoor CO2 direct air capture and utilization: Key strategies towards carbon neutrality

L.R. López, P. Dessì, A. Cabrera-Codony, L. Rocha-Melogno, N.J.R. Kraakman, M.D. Balaguer, S. Puig IN: Cleaner Engineering and Technology 20, 100746, https://doi.org/10.1016/j.clet.2024.100746

One application of DAC is indoor CO2 direct air capture (iCO2-DAC). A wide range of materials with unique properties for CO2 capture have been investigated, including porous materials, zeolites, and metal-organic frameworks. This review article highlights the importance of iCO2-DAC to improve indoor air quality in buildings and boost the circular economy. It discusses the available carbon capture technologies and materials, discussing their properties and focusing on those potentially applicable to indoor environments.

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Block et al. (2024): Analysing direct air capture for enabling negative emissions in Germany: an assessment of the resource requirements and costs of a potential rollout in 2045

Simon Block, Peter Viebahn, Christian Jungbluth IN: Frontiers in Climate 6, https://doi.org/10.3389/fclim.2024.1353939

The aim of this paper is to analyse and comparatively classify the resource consumption (land use, renewable energy and water) and costs of possible DAC implementation pathways for Germany. The paths are based on a selected, existing climate neutrality scenario that requires the removal of 20 Mt of CO2 per year by DACCS from 2045. The analysis focuses on the so-called “low-temperature” DAC process, which might be more advantageous for Germany than the “high-temperature” one.

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Wang et al. (2024): Reviewing direct air capture startups and emerging technologies

Eryu Wang, Rahul Navik, Yihe Mia, Qi Gao, David Izikowitz, Lei Chen, Jia Li IN: Cell Reports Physical Science 5 (2), 101791, https://doi.org/10.1016/j.xcrp.2024.101791

To facilitate market-based DAC research, this review compiles information on over 50 DAC startups and their potential partners, revealing a diverse prospective market. By synthesizing existing studies and identifying the opportunities and challenges faced by different DAC startups, potential research is identified to enrich the DAC business ecosystem. This review aims to facilitate collaborations among science, engineering, and innovation management for worldwide deployments of DAC.

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Li et al. (2024): Critical review on mobile direct air capture: Concept expansion, characteristic description, and performance evaluation

Shuangjun Li, Yifang Feng, Yuhan Li, Shuai Deng, Xiangkun Elvis Cao, Ki Bong Lee, Junyao Wang IN: Matter 7 (3), 889-933, https://doi.org/10.1016/j.matt.2024.01.003

This review introduces the innovative concept of mobile DAC, expanding DAC’s scope and addressing development challenges. The research methodology within the context of mobile DAC’s application scenario is investigated. Specifically, the research focuses on mobile DAC integrated into vehicles, encompassing various aspects such as materials, reactors, and system-scale research approaches. 

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Bouaboula et al. (2024): Comparative review of Direct air capture technologies: From technical, commercial, economic, and environmental aspects

Houssam Bouaboula, Jamal Chaouki, Youssef Belmabkhout, Abdelghafour Zaabout IN: Chemical Engineering Journal 484, 149411, https://doi.org/10.1016/j.cej.2024.149411

Direct air capture is set to play a crucial role in meeting climate change targets as most recent climate scenarios rely on its large-scale implementation. Nevertheless, despite this widespread consensus, DAC performance and impact have not been sufficiently investigated, which has resulted in hindering its wide-scale deployment for climate change mitigation initiatives. Here, we present a comparative review of different DAC technologies and examine their performance from a holistic perspective by considering different aspects, from technical, commercial, and economic to environmental.

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Nokpho et al. (2024): Evaluating regeneration performance of amine functionalized solid sorbents for direct air CO2 capture using microwave

Pacharapol Nokpho, Paka-on Amornsin, Petpitcha Boonmatoon, Xiaolin Wang, Benjapon Chalermsinsuwan IN: Materials Today Sustainability 26, 100728, https://doi.org/10.1016/j.mtsust.2024.100728

CO2 capture by liquid amine has many drawbacks. These processes require significant energy to regenerate the solvents, releasing the captured CO2 for storage or utilization, which leads to increased operational costs and can diminish the overall efficiency of carbon capture systems. Recent research explores new promising techniques by CO2 capture using highly efficient solid sorbents. This study then focuses on enhancing a porous alumina material with potassium carbonate (K2CO3) and monoethanolamine to optimize CO2 capture capacity and regeneration performance. 

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