Schlagwort: DACCS

Garrido et al. (2023): Implementing vanadium peroxides as direct air carbon capture materials

Eduard Garrido Ribó, Zhiwei Mao, Jacob S. Hirschi, Taylor Linsday, Karlie Bach, Eric D. Walter, Casey R. Simons, Tim J. Zuehlsdorff, May Nyman IN: Chemical Science, DOI: 10.1039/D3SC05381D

Here the authors explore metastable early d0 transition metal peroxide molecules that undergo stabilization via multiple routes, including DAC. Specifically here, they describe via experiment and computation the mechanistic conversion of A3V(O2)4 (tetraperoxovanadate, A = K, Rb, Cs) to first a monocarbonate VO(O2)2(CO3)3−, and ultimately HKCO3 plus KVO4. Single crystal X-ray structures of rubidium and cesium tetraperoxovanadate are reported here for the first time, likely prior-challenged by instability. Infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), 51V solid state NMR (nuclear magnetic resonance), tandem thermogravimetry-mass spectrometry (TGA-MS) along with calculations (DFT, density functional theory) all converge on mechanisms of CO2 capture and release that involve the vanadium centre, despite the end product of a 300 days study being bicarbonate and metavanadate. 

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Cameli et al (2024): Conceptual Process Design and Technoeconomic Analysis of an e-Methanol Plant with Direct Air-Captured CO2 and Electrolytic H2

Fabio Cameli, Evangelos Delikonstantis, Afroditi Kourou, Victor Rosa, Kevin M. Van Geem, Georgios D. Stefanidis IN: Energy Fuels, https://doi.org/10.1021/acs.energyfuels.3c04147

CO2-based methanol synthesis routes solely based on renewable electricity have been proposed. However, the production route via direct air-captured (DAC) CO2 and green H2 from water electrolysis (WE) is not industrially available, and in-depth feasibility studies are needed to determine its viability. By designing a 50 kt y–1 e-MeOH production plant based on DAC-CO2 and electrolytic H2, the authors assess the plant’s performance and economic feasibility against the state-of-the-art industrial manufacturing based on natural gas steam reforming. Absorption-based DAC accounts for the highest capital expenditure (CAPEX) of the plant, whereas the proton-exchange membrane WE drives electricity consumption.

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Will Direct Air Capture Ever Be Affordable? The Rise of DAC 3.0

by  Jonte Boysen & Torben Schreiter on medium.com, February 07, 2024

„Direct Air Capture (DAC) has been a prominent topic in mainstream media for over two years now and has often been portrayed through a fairly narrow lens focusing mainly on two specific technologies: Climeworks’ solid sorbent and Carbon Engineering’s liquid solvent systems. This narrow focus, however, overlooks the broader, dynamic landscape of over 80 companies innovating in this field. This article aims to dispel some common, oftentimes overly pessimistic, misconceptions about DAC and its potential. We aim to offer a more optimistic yet grounded and comprehensive view on the topic and — hopefully — inspire new angles for looking at DAC.“

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Cheng et al. (2024): Quaternized Plant-Based Porous Biochar for Direct Air Capture of CO2 by Moisture-Swing Adsorption

Xinyue Cheng, Xueyan Sun, Shiqiang Zheng, Wenjia Zhou, Zhen Yuan, Liangliang Zhu, Xi Chen IN: Industrial & Engineering Chemistry Research, https://doi.org/10.1021/acs.iecr.3c03023

In this work, through a quaternization process, inexpensive and readily available plant-based biochars including walnut shell, cornstalk, rice husk, and long-stalked lentil shell were prepared as moisture-swing adsorbents to capture CO2 from ambient air. Among these biochar adsorbents, the most effective one was found to be the quaternized long-stalked lentil shell, whose CO2 adsorption capacity reached 0.88 mmol/g at 25 °C and 50% relative humidity, which is around five times that of previously reported biochar moisture-swing adsorbents (including bamboo cellulose and chitosan aerogel).

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Ngwu et al. (2024): Passive Direct Air Capture of Carbon Dioxide with an Alkaline Amino Acid Salt in Water-Based Paints

Godwin Ngwu, Humbul Suleman, Faizan Ahmad, Danial Qadir, Zufishan Shamair, Qazi Nasir, Muhammad Nawaz IN: Energies, 17(2), 320, https://doi.org/10.3390/en17020320

The current study presents the first results of the passive capture of carbon dioxide from the air in aqueous sodium lysinate solutions at ambient conditions. The salt has shown good passive direct air capture (DAC) properties for carbon dioxide with spent solutions exhibiting more than 5% carbon dioxide by weight. Moreover, different quantities of sodium lysinate solutions were mixed with three commercial water-based paints, and their passive DAC performance was studied for 45 days.

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Yang & Wu (2024): Net-zero carbon configuration approach for direct air carbon capture based integrated energy system considering dynamic characteristics of CO2 adsorption and desorption

Lihua Yang, Xiao Wu IN: Applied Energy, 358, 122608, https://doi.org/10.1016/j.apenergy.2023.122608

This paper develops a configuration-oriented dynamic model for the DAC process to correctly reflect the energy consumption characteristics under given internal operating conditions and the variations of the CO2 adsorption/desorption rate over time. The DAC model is embedded into the configuration framework of the DAC-based  integrated energy system (IES), formulating a novel configuration approach that optimizes the investment, operation and maintenance, carbon reduction and renewables utilization performance.

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Nature – Gutsch & Leker (2024): Co-assessment of costs and environmental impacts for off-grid direct air carbon capture and storage systems

Moritz Gutsch, Jens Leker IN: Communications Engineering, 3, 14, https://doi.org/10.1038/s44172-023-00152-6

Here the authors present a cost model and life cycle assessment for several combinations of off-grid DACSs, powered by photovoltaic (PV) energy and heat pumps combined with battery storages to mitigate intermittency of the PV energy source. Utilization factors of DACSs are estimated for different locations, power of PV systems and battery capacities.

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Desport et al. (2023): Deploying direct air capture at scale: how close to reality?

Desport, L., A. Gurgel, J. Morris, H. Herzog, Y-H.H. Chen, S. Selosse and S. Paltsev IN: Energy Economics, 129, 107244, doi: 10.1016/j.eneco.2023.107244

In this study, the authors employ an economywide model to more fully explore the potential role of DAC, considering the full range of cost estimates ($180-$1,000/tCO2), DAC units supplied by either dedicated renewables or grid electricity, and both the storage of captured CO2 (DACCS) or its utilization (DACCU) to produce fuels.

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Direct air capture: An expensive, dangerous distraction from real climate solutions

by Kurt Zenz House, Josh Goldman, Charles F. Harvey on thebulletin, December 15, 2023

„All year, the zeitgeist has been building toward technologies that separate carbon dioxide from air, referred to as direct air capture (DAC). In September, the United States Department of Energy awarded Occidental Petroleum a $600 million grant to build a DAC machine. As scientists and entrepreneurs who’ve dedicated our careers to help solve global warming, you might expect us to be happy. We are not.“

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