Kategorie: Unkategorisiert

Category Icon

Eshaghi Gorji et al. (2025): Direct Air Capture: Recyclability and Exceptional CO₂ Uptake Using a Superbase

Zahra Eshaghi Gorji, Baljeet Singh, Antti Lempinen and Timo Repo, IN: Environmental Science & Technology, https://doi.org/10.1021/acs.est.5c13908

Direct air capture (DAC) of CO₂ presents challenges owing to its low concentration and the high humidity of ambient air. In this study, efficient and reversible CO₂ capture from humid air was achieved using a liquid absorbent derived from a deep eutectic solvent (DES), composed of 1,5,7-triazabicyclo[4.3.0]non-6-ene (TBN) and benzyl alcohol.

LINK

#
Category Icon

Bolongaro et al. (2025): 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: ChemRXiv, https://doi.org/10.26434/chemrxiv-2025-8zjlg-v2

Calcium-looping direct air carbon capture and storage (DACCS) is a mature technology positioned for gigatonne-scale carbon dioxide removal (CDR). However, a holistic assessment of its system-wide environmental performance and large-scale implications remains critically absent. Here, the authors present a prospective life cycle assessment (LCA) of megatonne-scale calcium-looping DACCS systems under projected 2050 energy scenarios, evaluating CO₂ removal alongside 18 other environmental impact categories.

LINK

#
Peer-reviewed Publications

Martirosian et al. (2025): Alignment of international standards for carbon dioxide removal (CDR) using Carbon Capture and Storage (CCS): Comparative analysis of the EU Carbon Removal and Carbon Farming (CRCF) Regulation against the Integrity Council for the Voluntary Carbon Market (ICVCM) and Article 6.4 of the Paris Agreement

Natasha Martirosian, Murali A Thoppil, Evangelos Mouchos, Joanna House, Julian Smart, Injy Johnstone, Luka Štrubelj and Isabela Butnar, IN: University of Bristol, https://doi.org/10.71706/92435e1c-c500-43ce-be95-1007565ebc7a

Achieving net-zero climate goals requires carbon dioxide removal (CDR). Doing this with credibility and trust requires robust standards for measuring reporting and verification of removals. In the UK context, the UK government has commissioned the British Standards Institution (BSI) to develop standards for Bioenergy with Carbon Capture and Storage (BioCCS) and Direct Air Capture with CCS (DACCS), with detailed methodological approaches under development. To inform this process, this report critically compares three international protocols: The Carbon Removal and Carbon Farming (CRCF) Regulation EU 2024/3012 (and related regulations) is assessed against the the Integrity Council for the Voluntary Carbon Market (ICVCM) Core Carbon Principles and Article 6.4 of the Paris Agreement.

LINK

# ,
Category Icon

Venmans et al. (2025): Temporary carbon dioxide removals to offset methane emissions

Frank Venmans, Wilfried Rickels and Ben Groom, IN: Nature Climate Change, https://doi.org/10.1038/s41558-025-02487-8

Unlike CO₂, methane emissions have a particularly large short-term effect on temperature. The authors argue that these largely temporary temperature effects of methane emissions are apt to be offset by temporary CO₂ removal. Temporally matching offsetting temperature reductions to the temperature impulse of methane eliminates the sizable intertemporal welfare transfers that occur when methane is offset by equivalent permanent CO₂ removals. Assessing equivalence based on avoided economic damages suggests that about 87 temporary CO₂ removals over a period of 30 years are needed to offset 1 t of methane. Agreement on the appropriate quantity of temporary CO₂ offsets is insensitive to controversial parameters such as the social discount rate, climate damages and future emission scenarios. Short-term monitoring periods of 20–30 years are likely to be more credibly enforceable for various nature-based CO₂ removal projects than long-term monitoring requirements.

LINK

#
Peer-reviewed Publications

León et al. (2025): Plant and Soil Responses to Concrete and Basalt Amendments Under Elevated CO₂: Implications for Plant Growth, Enhanced Weathering and Carbon Sequestration

Haridian del Pilar León, Sara Martinez, María del Mar Delgado, José L. Gabriel, Sergio Alvarez, IN: Agriculture (MDPI), https://doi.org/10.3390/agriculture15232435

The rise in greenhouse gases underscores the urgency of carbon dioxide removal (CDR) as a complement to emission reductions. Enhanced rock weathering (ERW) holds promise by coupling geochemical carbon sequestration with agronomic benefits, although integrative experimental evidence remains limited. This study evaluated two amendments (recycled concrete in wheat, C₃, and basalt in maize, C₄) under ambient and elevated CO₂ conditions (~1000 ppm).

LINK

# ,
Category Icon

Liu et al. (2025): Integrating experimental and geochemical modelling for productive carbon dioxide mineralization in the South China Sea

Bo Liu, Erfan Mohammadian, Amin Azdarpour, Rahim Masoudi, Chenlu Xu and Boyang Wang, IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-02988-6

Reaching carbon neutrality requires innovative and scalable carbon sequestration technologies. Here, the authors present an enhanced ex-situ mineral carbonation method using South China Sea seawater and calcium-rich additives for carbon dioxide storage. The authors conducted high-pressure (50–500 atm) laboratory experiments using calcium oxide, calcium hydroxide, and wollastonite, and performed numerical geochemical simulations.

LINK

#
Category Icon

O’Keefe et al. (2025): Net-zero for Canada: An open-method modeling approach

Kowan T.V. O’Keefe, Matthew Binsted, Leon Clarke, Ryna Cui, Nathan Hultman, Robert Hunt Sprinkle, IN: Energy and Climate Change, https://doi.org/10.1016/j.egycc.2025.100224

Canada is a major oil- and gas-producing country that has committed into law an ambitious goal: net-zero greenhouse gas (GHG) emissions economy-wide by 2050. In this work, transition dynamics for Canada are examined across several net-zero GHG emissions scenarios with detailed policy representation using the open-source Global Change Analysis Model (GCAM). To the authors knowledge, this study is the first modeling analysis of Canadian net-zero GHG emissions scenarios with extensive policy representation and detailed sensitivity analysis. A major contribution of the authors’ open-method modeling approach is making the entire analysis publicly available to facilitate vetting, replicability, precise comparability with other studies, and modification by others to explore additional scenarios. 

LINK

#
Category Icon

Nature – Mariani et al. (2025): The combined impact of fisheries and climate change on future carbon sequestration by oceanic macrofauna

Gaël Mariani, Jérôme Guiet, Daniele Bianchi, Tim DeVries, Nicolas Barrier, Marc Troussellier and David Mouillot, IN: Nature Communications, https://doi.org/10.1038/s41467-025-64576-8

Although the role of marine macrofauna in the ocean carbon cycle is increasingly understood, the cumulative impacts of fisheries and climate change on this pathway remain overlooked. Here, using a marine ecosystem model, the authors estimate that each degree of warming reduces macrofauna biomass and carbon export by 4.2% and 2.46%, respectively.

LINK

#
Category Icon

Nature – Malakar et al. (2025): Stakeholders have knowledge priorities beyond local impacts for responsible marine-based carbon dioxide removal in Tasmania

Yuwan Malakar, Kerryn Brent, Talia Jeanneret and John Gardner, IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-02775-3

Novel carbon dioxide removal (CDR) approaches are being developed to help achieve the Paris Agreement temperature targets. Beyond technological challenges, their deployment in specific locations can be shaped by local stakeholders’ perspectives. Here the authors use ocean alkalinity enhancement (OAE), a marine-based CDR approach, to explore what stakeholders need to develop informed opinions about these technologies. They employed a bottom-up engagement approach, interviewing 23 stakeholders in Tasmania, Australia. While some participants held preliminary views, all expressed a need for more information regarding technological feasibility, environmental and community impacts, governance, and OAE’s role in climate policy.

LINK

#
Category Icon

Niveditha & Palanisamy (2025): Upcycling iron-rich industrial waste into a carbon-sequestering composite binder through optimized carbonation curing for structural applications

Niveditha M. and Palanisamy T., IN: International Journal of Environmental Studies, https://doi.org/10.1080/15623599.2025.2556259

Background: Steel production generates large quantities of mill scale, a by-product rich in iron oxides, with global generation estimated at 13.5 million tons annually. Simultaneously, Portland cement production, essential for concrete, contributes nearly 8% of global CO₂ emissions, highlighting the urgent need for low-carbon alternatives. Iron carbonate (FeCO₃), typically regarded as a corrosion product, offers an underexplored opportunity for deliberate synthesis in binders to achieve both structural performance and CO₂ sequestration. Repurposing mill scale into carbon-sink binders thus provides a dual pathway for waste valorization and climate change mitigation, while advancing circular economy and industrial symbiosis principles. Methods: A composite binder was developed using mill scale, fly ash, metakaolin, and limestone, with oxalic acid employed as a chelating agent to promote iron dissolution and carbonate formation.

LINK

#