 | Links to recent scientific papers, web posts, upcoming events, job opportunities, podcasts, and event recordings, etc. on Carbon Dioxide Removal Technology.If you find this work valuable, please consider supporting us with a paid subscription! TABLE OF CONTENTSNote: Click on the headings listed in the table of contents above to easily navigate to the sections you're interested in. COMMERCIAL NEWS RESEARCH PAPERSBrazzola, N., Meskaldji, A., Patt, A., Tröndle, T., & Moretti, C. (2025). The role of direct air capture in achieving climate-neutral aviation. Nature Communications, 16(1), 588.Synopsis: The growing demand for air travel challenges climate mitigation. Direct air capture (DAC) offers dual applications: carbon removal (DACCS) or synthetic fuel production (DACCU). A techno-economic analysis shows synthetic fuels from DACCU can be more cost-effective than DACCS for achieving 2050 climate neutrality, especially by mitigating contrails. Factors like low electricity costs (€0.02/kWh) and high kerosene prices (€0.9/l) enhance competitiveness. Strategic policies, such as removing fossil fuel subsidies, can accelerate aviation's shift to synthetic fuels.
Van Roijen, E., Miller, S. A., & Davis, S. J. (2025). Building materials could store more than 16 billion tonnes of CO2 annually. Science, 387(6730), 176-182.Synopsis: Achieving net-zero emissions may require CO2 removal technologies, including CO2-storing building materials. This study finds that replacing conventional materials with these alternatives in new infrastructure could store up to 16.6 ± 2.8 billion tonnes of CO2 annually, about 50% of 2021 emissions. Storage potential depends more on material use scale than carbon content per unit. This scalable reservoir could reduce reliance on costlier or riskier geological, terrestrial, or ocean storage methods.
Zhuang, W., Zhu, T., Li, F., Queiroz, H. M., Yan, Q., Zhao, X., & Liu, J. (2025). Potential Environmental Impacts and Management Strategies for Metal Release during Ocean Alkalinity Enhancement Using Olivine. Environmental Science & Technology.Synopsis: Ocean alkalinity enhancement using enhanced weathering of olivine (EWO) is a promising marine carbon dioxide removal technique. This study examines overlooked environmental impacts, including migration of iron and potentially toxic metals (PTMs) like nickel and chromium, which may cause secondary contamination in sediments. Mitigation strategies, such as alkalization equipment, are proposed to maintain PTM levels within standards. Comprehensive environmental assessments are vital for sustainable OAE deployment.
Sanei, H., Petersen, H. I., Chiaramonti, D., & Masek, O. (2025). Evaluating the two-pool decay model for biochar carbon permanence. Biochar, 7(1), 1-7.Synopsis: Accurate biochar carbon permanence estimation is vital for its role as a carbon dioxide removal strategy. Current models, based on a two-pool exponential decay framework, suffer from flawed parameterization, disproportionately underestimating the labile carbon fraction (C1) and overestimating decay rates. Moreover, assigned carbon fractions lack correlation with key parameters like production temperature and H/C ratios. Improved parameterization with diverse empirical data is essential for better biochar CDR potential assessments.
Zhang, D., Zeng, Q., Chen, H., Guo, D., Li, G., & Dong, H. (2024). Enhanced Rock Weathering as a Source of Metals to Promote Methanogenesis and Counteract CO2 Sequestration. Environmental Science & Technology, 58(44), 19679-19689.Synopsis: Enhanced weathering of (ultra)mafic rocks is a potential CO2 sequestration strategy, but it may unintentionally promote methane production. Experiments with crushed peridotite and basalt showed significant growth and methanogenesis in Methanosarcina acetivorans C2A due to trace metals like Fe, Ni, and Co released from the rocks. Proteomic analysis revealed increased expression of methanogenesis enzymes. This unintended methane release could undermine the carbon sequestration benefits of enhanced weathering.
Li, W., Zhou, J., Ciais, P., Gasser, T., Wang, J., Li, Z., ... & Huang, X. (2024). Contributions of countries without a carbon neutrality target to limit global warming.Synopsis: Bioenergy with carbon capture and storage (BECCS) is critical for climate mitigation. Non-carbon-neutral (non-CN) countries could enhance global efforts by cultivating switchgrass, removing 9.1 ± 2.8 to 19.9 ± 5.2 PgC under low-warming and overshoot scenarios, respectively. This yields a net cooling effect of up to 0.02 ± 0.06 °C, despite offsetting biophysical warming. Non-CN countries contribute more in low-warming scenarios, underscoring the need for a global system for effective climate mitigation.
Li, X., Bi, C., Wu, J., Zhang, C., Yan, W., Xiao, Z., ... & Su, Y. (2025). Maximum carbon uptake potential through progressive management of plantation forests in Guangdong Province, China. Communications Earth & Environment, 6(1), 9.Synopsis: Forest cover in Guangdong Province, China, has doubled in four decades, with young planted forests (PFs) playing a key role as carbon sinks. However, carbon accumulation slows as forests mature. Using satellite data, growth models, and machine learning, this study identified terrain, climate, and soil nutrients as major carbon accumulation drivers. Under optimal management, which involves harvesting PFs over 20 years and annual replanting, carbon stock could reach 0.53 ± 0.01 PgC by 2060, significantly enhancing sequestration compared to preservation alone.
Suessle, P., Taucher, J., Goldenberg, S. U., Baumann, M., Spilling, K., Noche-Ferreira, A., ... & Riebesell, U. (2025). Particle fluxes by subtropical pelagic communities under ocean alkalinity enhancement. Biogeosciences, 22(1), 71-86.Synopsis: Ocean alkalinity enhancement offers potential for long-term CO2 removal by altering seawater carbonate chemistry. In mesocosm experiments in the subtropical North Atlantic, OAE (ΔTA up to 2400 µmol/kg) did not impact the vertical flux of key elements (C, N, P, Si) or plankton-driven carbon export over 29 days. However, high OAE levels caused abiotic mineral precipitation, reducing CO2 removal efficiency. Careful operating ranges are essential, and further testing across nutrient regimes is needed to ensure ecosystem integrity.
Alqahtani, A., Addassi, M., Hoteit, H., & Oelkers, E. (2025). Rapid CO2 mineralization by zeolite via cation exchange. Scientific Reports, 15(1), 958.Synopsis: This study highlights the mineral carbonation potential of zeolites, common basalt alteration products. Batch reactor experiments at 60 °C combining stilbite (a Ca-rich zeolite) with sodium carbonate solutions showed rapid calcite formation. Within a month, over 5% of stilbite's mass was converted to CO2 via rapid Na-Ca exchange, achieving near-maximum carbonation. Results suggest zeolite-rich rocks could be prime targets for subsurface CO2 storage due to their fast carbonation rates.
Barzegar, B., & Feyzi, F. (2025). Designing cellulose based biochars for CO2 separation using molecular simulations. Scientific Reports, 15(1), 1643.Synopsis: This study explores cellulose pyrolysis using reactive molecular dynamics to develop biochars for CO2 separation. Six biochars (densities: 0.160–0.987 g/cm³) were tested for CO2, CH4, and N2 adsorption using GCMC simulations. CO2 showed stronger interactions, with the 0.351 g/cm³ biochar achieving the highest CO2 selectivity. Water vapor reduced CO2 adsorption by competing for active sites. Findings suggest optimized cellulose-derived biochars hold potential for sustainable CO2 separation technologies.
You, M., Huang, Y., Wu, N., & Yuan, X. (2025). Efficiency Evaluation and Resource Optimization of Forestry Carbon Sequestration Projects: A Case Study of State-Owned Forest Farms in Fujian Province. Sustainability, 17(1), 375.Synopsis: Forestry carbon sink projects are crucial for China's carbon neutrality, with state-owned forest farms leading efforts. Analyzing 14 projects in Fujian Province using Data Envelopment Analysis (DEA), the study found that management capability and climate conditions significantly impact efficiency. High investment requirements limit small-scale forest farms' participation. Resource optimization based on efficiency evaluations could enhance project outcomes and broaden engagement in forestry carbon initiatives.
Olim, S. T., Nickoloff, A., Moffat, L. J., Weaver, A. J., & Eby, M. (2025). Mitigating anthropogenic climate change with aqueous green energy. Scientific Reports, 15(1), 1700.Synopsis: Achieving net-zero emissions and limiting warming to 2 °C requires innovative CO2 removal technologies. Combining direct air CO2 capture and storage (DACCS) with ocean thermal energy conversion (OTEC) offers a sustainable solution. This study highlights that OTEC powers floating DACCS plants to inject CO2 into deep marine sediments, ensuring safe, permanent storage. Over 70 years, this approach could reduce global warming by 35% compared to business-as-usual scenarios, highlighting its potential for climate mitigation.
Oschlies, A., Bach, L., Fennel, K., Gattuso, J. P., & Mengis, N. (2025). Perspectives and challenges of marine carbon dioxide removal. Frontiers in Climate, 6, 1506181.Synopsis: The Paris Agreement's goal to limit global warming below 2°C necessitates drastic emission reductions and carbon dioxide removal. Given uncertainties in land-based CDR approaches, marine CDR is gaining attention. This review examines marine CDR potentials, risks, side effects, and challenges in feasibility, governance, and monitoring across biotic and geochemical methods. It also evaluates insights from the now-prohibited direct CO2 injection into seawater, offering guidance for biotic marine CDR strategies.
Rong, N., Shi, X., Wang, S., Han, L., Liu, K., Ge, L., ... & Wang, G. (2025). Optimized acid leaching synthesis and steam regeneration of the steel slag-derived calcium-based sorbent for enhanced CO2 capture. Journal of Cleaner Production, 144673.Synopsis: CaO-based materials show promise in CO2 capture, energy storage, and CO2 conversion. Steel slag, rich in calcium, is a viable precursor for producing Ca-based CO2 sorbents. This study optimized acetic acid leaching parameters and employed steam reactivation to enhance sorbent durability. Key findings highlight acid concentration and leaching temperature as critical to CO2 capture, while slag-to-acid ratio and leaching duration affect durability. Steel slag-derived sorbents outperform reagent-grade CaO, with steam addition reducing reactivity decay.
Bukosa, B., Mikaloff-Fletcher, S., Brailsford, G., Smale, D., Keller, E. D., Baisden, W. T., ... & Brandon, A. (2025). Inverse modelling of New Zealand's carbon dioxide balance estimates a larger than expected carbon sink. EGUsphere, 2025, 1-41.Synopsis: A decade-long (2011–2020) inverse modeling study for New Zealand reveals a significant terrestrial biosphere carbon sink of -171 ± 29 Tg CO2 yr⁻¹, far exceeding estimates from New Zealand’s Greenhouse Gas Inventory (-24 Tg CO2 yr⁻¹) and biosphere models (-118 ± 22 Tg CO2 yr⁻¹). Discrepancies are most pronounced in South Island regions with mature forests and grazed pastures. Seasonal flux patterns suggest reduced atmospheric CO2 during autumn/winter. Identifying the causes of these differences is critical for refining inventory methods and enhancing climate mitigation strategies.
Carbon storage potential of alternative building materials ( Science) WEB POSTSCarbon security and the geopolitics of carbon removal (Carbon-based Commentary) Carbon-Based CommentaryThis post was written in partnership with Sarah Godek, an international relations researcher based in Washington, D.C… 6 days ago · 5 likes · Grant Faber and Sarah Godek The False Promise of Blue Carbon (Humans: Keystobe Species) Humans: Keystone SpeciesI’ve been professionally involved in ecosystem restoration and regenerative development for a decade and a half. In the last six years, I've been involved in carbon projects in Latin America, West Africa, the Middle East, Europe, and Central Asia, from being the main project developer to being an advisor. Most of have been stymied at some point in the… 8 days ago · 53 likes · 32 comments · Neal Spackman America's improved carbon removal legislation (Terraform Now) Terraform NowI’d like to thank my readers who have been patient for the last 4 months while I made a career transition — I now work at Climeworks, the Direct Air Capture and Carbon Removal company. While I am thrilled to join the team, this blog will not become an advertisement for Climeworks. As always I’ll remain objective and only use public data to keep you upda… 5 days ago · Joe Rigodanzo BOOKREPORTSUPCOMING EVENTS(NEW) DC Climate Week | 28 April – 02 May 2025 | Washington, D.C.LAC Soil Carbon 2025 | 25-28 June 2025 | Reo de Janeiro (Brazil)We have curated a “Carbon Removal Events Calendar.” Explore and stay informed about upcoming events, conferences, and webinars on Carbon Dioxide Removal technology. Sync specific events / all events to your default calendar to ensure you never miss out on important CDR updates. Carbon Removal Events Calendar GUIDELINES:Sync selected events to your default calendar in these simple steps:1) Click on the event you want to sync.2) Tap the menu icon (three vertical lines) at the top left.3) Choose 'Share.'4) Pick your default calendar.5) Save the event.Sync the entire Teamup Calendar to your default calendar with these simple steps:1) Tap the menu icon (three vertical lines) at the top right.2) Choose 'Preferences.'3) Click 'iCalendar Feeds.'4) Copy the URL shown for 'CDR Events / CDR General Guidelines / CDR Job Deadlines.'’5) Paste the URL into your default calendar settings.6) Click 'Subscribe' or 'Add Calendar.'
You can directly sync all Carbon Removal events to your default calendars by pressing the link below: Sync CDR Events to your Default Calendar JOB OPPORTUNITIES"The Carbon Business Council is a member-driven nonprofit coalition of companies unified to restore the climate. We are the preeminent industry voice for carbon management innovators."
"Yama’s purpose is to scale-up, industrialize and launch on the market the lowest energy consumption scalable Direct Air Capture technology."
"Parallel Carbon is developing the hardware platform fundamental to a post-fossil fuel society. We are building technology that removes carbon dioxide from the air while producing hydrogen to eliminate emissions. Our mission is to deliver the world’s most scalable solution to reversing climate change."
"CEEZER is a platform for CO2 compensation and high-tech removal credits with access to >8,000 climate projects worldwide, verified by globally recognized registries."
"There is an urgency to mitigate methane due to its high heat trapping potential being 84 times more than that of carbon dioxide. This is especially challenging now since most methane gases are released in small doses over large areas of natural wetlands and thawing permafrost. Current methane mitigation methods rely on high temperature processes, and this is not feasible and not efficient if deployed near natural methane sources.With the advancements in renewable technologies, it has become attractive to utilize these ‘free’ electrons to tackle problems related to sustainability such as that mentioned above. In this studentship, you will engineer nanostructures and investigate catalytic properties under charge modulation for methane removal. You will determine the effects of charge application, methane concentration, different modes of perturbation, etc. with the objective of developing an active material. My group specializes in coating and thin film methods and catalytic systems, and the big picture goal is to find an alternative material that is just as active as expensive precious metals such as palladium and platinum, the two best thermal methane oxidation catalysts in industry."
"Brimestone's breakthrough process delivers multiple market-ready industrial materials—starting with cement."
"At Land Life, our ambition is not just to create positive change, but to inspire it. We're on a mission to restore our planet's 2 billion acres of degraded land, by planting the right trees, at the right time, and in the right place; leveraging technology every step of the way; and unlocking carbon and other new markets to fund this work. Our team is global, our impact is significant, and we're looking for an impact-driven Product Manager with carbon removal certification expertise and experience to join our Product Team."
"At Acre, we work with the most aspirational businesses with potential to make real change; from those who are just starting out to those who are well on the journey to crafting a legacy."
"Carbon180 is working to reverse two centuries of carbon emissions — the right way."
Isometric is the world’s most trusted carbon registry. We issue scientifically rigorous carbon credits to help Fortune 100 companies avoid greenwashing while tackling climate change.
"Removall is a company specializing in the development and financing of high-impact carbon projects."
"Terradot's mission is to stabilize Earth’s climate by transforming nature’s most powerful permanent carbon removal process into a global climate solution. By advancing science, building technology, and assembling a global coalition, we are catalyzing a global initiative to scale Enhanced Rock Weathering within the next decade, starting in Brazil."
"The Centre for Climate Repair (CCR) is a multi-disciplinary centre hosted in the Department of Applied Mathematics and Theoretical Physics (DAMTP) and is focused on supporting research in three main areas: emissions reduction, greenhouse gas removal and refreezing the arctic."
GigaBlue is fully integrated Carbon capture, sequestration and monetization company. In partnership with merchant fleets, governments and major corporations we deploy geo-optimized nutrient particles that support phytoplankton growth and unlock the oceans power to rapidly sequester gigatons of carbon for millennia. Join us to heal the past, enhance the present and save the future."
"Lithos Carbon revolutionizes the carbon capture industry through enhanced rock weathering technology. We work with farmers to spread basalt rock on farmland, which increases soil health and repurposes post-industrial waste."
"Planetary Technologies’ vision is to protect and restore the ocean and climate for generations to come. We do this by enhancing the ocean’s natural ability to fight climate change through carbon dioxide removal and storage."
"InPlanet is an impact-driven, remote-first, ClimateTech (CDR) startup headquartered in Germany and Brazil to reverse climate change and make tropical agriculture more regenerative, low-carbon, and sustainable. We are working with Enhanced Rock Weathering in tropical agriculture, focusing on Brazil."
Looking for your dream job in CDR? There are 692 jobs available *right now*: check them all out at: CDRjobs Board
If you find this work valuable, consider supporting us with a paid subscription. We put a lot of time, effort and money (£XXX each month) into compiling this resource for you. PODCASTSOAE Legality—Murthy | Reviewer 2 does geoengineering | OAE legality - Murthy Reviewer 2 does geoengineering 1:16:29 |
"Are you allowed to throw alkaline minerals into the sea? Ashwin Murthy explains how to do Ocean Alkalinity Enhancement, without ending up in jail. Ashwin Murthy, Korey Silverman-Roati & Romany M. Webb, State Authority to Regulate Ocean Alkalinity Enhancement, Sabin Center for Climate Change Law, Columbia Law School, December 2024 (2024). Available at: https://scholarship.law.columbia.edu/sabin_climate_change/237"
Episode #3: Policy | Carbon Removal Newsroom | Episode #3: Policy Carbon Removal Newsroom 43:37 |
"This episode of CRN is focused on contemporaneous CDR policy topics. It include discussion of the key aspects of two recently released reports: the U.S. Fast Track Committee on Marine Carbon Dioxide Removal’s National Marine Carbon Dioxide Removal Research Strategy, and the Bezo Earth Fund 2050 CDR Roadmap. The panel also discusses the latest activities of the London Convention/Protocol in the context of marine carbon removal approaches."
Can policy play a catalytic role in advancing MRV? | The Carbon Curve The Carbon CurveEpisode 47 is with Giana Amador, Executive Director at Carbon Removal Alliance… a month ago · 2 likes · Na’im Merchant "A discussion with Giana Amador from Carbon Removal Alliance about the role of government in supporting MRV standards, fostering transparency, and promoting community benefits."
How Climeworks is making Direct Air Capture a viable decarbonisation pathway | Sustainability in the Air Sustainability in the AirIn this episode of our ‘Sustainability in the Air’ podcast, Dr. Christoph Gebald, Co-founder and Co-CEO of Climeworks, speaks with SimpliFlying CEO Shashank Nigam about scaling direct air capture (DAC) technology and its vital role in sustainable aviation… 4 days ago · 2 likes · Ayushi Badola "In this episode of our ‘Sustainability in the Air’ podcast, Dr. Christoph Gebald, Co-founder and Co-CEO of Climeworks, speaks with SimpliFlying CEO Shashank Nigam about scaling direct air capture (DAC) technology and its vital role in sustainable aviation."
YOUTUBE VIDEOSThe Carbon Recap - 2024 edition | Carbon Gap "What a year for carbon dioxide removal (CDR) across the globe! We played our part in letting the world know about the urgency to deploy CDR, and the numbers speak for themselves."
Climate Engineering and the Napkin Diagram | Climate Emergency Forum "In this panel discussion from COP29 in Baku, host Herb Simmens, and experts Hugh Hunt, and Paul Beckwith explore the controversial topic of Climate Engineering and the Napkin Diagram.The conversation delves into the urgent need for a multi-faceted approach to combat climate change, including emissions reduction, carbon dioxide removal (CDR), and solar radiation management (SRM). The panelists argue that traditional methods alone may not be sufficient to address the rapidly escalating climate crisis.Hugh Hunt, from the Center for Climate Repair at Cambridge University, introduces the Napkin Diagram, illustrating the potential role of SRM in mitigating temperature rise. Paul Beckwith, a prolific climate educator, emphasizes the acceleration of extreme weather events and the failure of natural carbon sinks, highlighting the critical need for innovative solutions. Both experts stress the importance of research into SRM techniques, despite the controversy surrounding them.The discussion also touches on the challenges of introducing SRM into mainstream climate conversations, including political resistance and concerns about moral hazard. The panelists address the potential of SRM to mitigate risks associated with climate tipping points, such as the potential collapse of the Atlantic Meridional Overturning Circulation (AMOC). They conclude by advocating for more research and small-scale experiments to better understand the impacts and potential benefits of climate engineering techniques."
Meet the Carbon Chasers Driving Africa’s Clean Energy Future | Tencent Global "Africa is part of the global fight against climate change. Consider this: The Great Rift Valley in the continent’s east offers abundant geothermal energy potential and vast underground carbon storage capabilities.A new generation of green innovators — engineers, researchers and entrepreneurs — is working to harness this potential. From clean-energy breakthroughs to cutting-edge carbon sequestration tech like direct air capture (DAC), they’re shaping industries and creating opportunities.Among the leaders in this movement is Africa Climate Ventures, a “carbon chaser” funding sustainable energy projects in partnership with Tencent’s CarbonX Program."
Harnessing the Oceans for Climate Solutions with Dr. Annalisa Bracco | Biochar Life "Dr. Annalisa Bracco is a professor and Associate Chair for Research in the School of Earth and Atmospheric Sciences at the Georgia Institute of Technology. She is interested in using computation tools to better understand how our oceans work and the interactions between physics and biology across marine ecosystems. Her research group uses models, artificial intelligence and observations to study ocean transport, biogeochemical interactions, climate dynamics and carbon cycling in the climate system. Most recently she has been researching how coral reefs may exchange larvae, plastic pollution in the Gulf of Mexico, ocean mixing near seamounts and marine carbon dioxide removal through Sargassum algae and alkalinity enhancement."
Ms Suzanne Reynders, Coordinator, Soil Carbon IRC, ORCaSa Program | 4p1000 Initiative "The international "4 per 1000 Initiative: Soils for Food Security held the 8th "4 per 1000 Initiative Day" on Tuesday, November 26th, 2024, Online.The International Initiative "4 per 1000," launched by France on December 1st, 2015, at COP 21, federates all voluntary stakeholders of the public and private sectors (national governments, local and regional governments, companies, trade organizations, NGOs, research facilities, etc.) under the framework of the Lima-Paris Action Plan (LPAP).The Initiative aims to demonstrate that agriculture, particularly agricultural soils, can play a crucial role in food security and climate change.Supported by solid scientific documentation, this initiative invites all partners to state or implement practical actions on soil carbon storage and the type of practices to achieve this (e.g., agroecology, agroforestry, conservation agriculture, landscape management, etc.).The initiative encourages stakeholders to transition towards a productive, highly resilient agriculture based on the appropriate management of lands and soils, creating jobs and incomes, and ensuring sustainable development."
Weekly Carbon Removal Updates from 06 January - 12 January 2025 | Carbon Removal Updates Bulletin DEADLINESShare Carbon Removal Updates Leave a comment If you find this work valuable, consider supporting us with a paid subscription. We put a lot of time, effort and money into compiling this resource for you. © 2025 Carbon Removal Updates 548 Market Street PMB 72296, San Francisco, CA 94104 Unsubscribe 
| |
  |
|