 | | | | Links to recent scientific papers, web posts, upcoming events, job opportunities, podcasts, and event recordings, etc. on Carbon Dioxide Removal TechnologyHelp secure the future of this service by choosing 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. THIS WEEK’S TOP CDR HIGHLIGHTSEU CDR PURCHASING PROGRAM: Ecologic Institute and DG CLIMA held a workshop (recording available) on a potential purchasing programme for CRCF Permanent Carbon Removal Credits. The event aimed to inform the design and early rollout of such a programme to help grow Europe’s carbon removal market. Read the key takeaways from the event here. Sebastian Manhart and Eve Tamme will further discuss this on 27 May. ANALYSIS: A new Fastmarkets analysis shows durable CDRs like DAC remain costly today, limiting buyers. But by 2050, falling emissions, rising profits, and lower costs could make CDRs affordable to many more. Firms able to afford a Microsoft-style portfolio may rise from 1 in 90 today to 1 in 8 by 2050. DACS-only affordability could grow from 1 in 2000 today to 1 in 40 by 2050. CALL FOR CONSULTATION: The UK government has launched an independent review into carbon removal technologies, including BECCS and DACCS, to assess their role in achieving net-zero emissions by 2050. Respond by 20 June THESIS: Ádám Füzi published a thesis that compared eight Carbon Dioxide Removal technologies using literature review and SWOT analysis. Factors like readiness, cost, storage, mitigation potential, and social acceptance were evaluated to identify the most impactful CDR options for meeting the Paris goal of limiting warming below 2 °C. BIGGEST BIOCHAR DEAL: Exomad Green signed a 10-year deal with Microsoft to remove 1.24M tons of CO₂ using biochar. Carbonfuture's MRV+ will track and verify each tonne removed. It’s the biggest biochar deal and one of the largest carbon removal agreements ever. PODCAST: The latest episode of Reviewer 2 does geoengineering featured Fabien Bardinet, co-founder of CIRCEO, a company developing semi-autonomous sailing drones. These drones generate electricity from wind to power onboard electrochemical systems that remove carbon from seawater. Read on to unpack more updates: COMMERCIAL NEWS Share RESEARCH PAPERSAuthors: Yiannis Moustakis, Hao-Wei Wey, Tobias Nützel, Andreas Oschlies & Julia PongratzSynopsis: Using 42 simulations with two Earth System Models, this study assessed large-scale Afforestation/Reforestation and Ocean Alkalinity Enhancement over the 21st century. Results show global carbon fluxes scale linearly with CDR deployment, regardless of method type or amount. This suggests that combining land- and ocean-based CDR doesn't reduce overall efficiency, supporting mixed CDR portfolios as a viable path to meet Paris Agreement goals while managing sustainability risks.
Authors: Shuangjun Li, Zhenyu Du, Junyao Wang, Hao Wang, Xiangkun Elvis Cao, et al.Synopsis: In this study, electro-methanol (e-methanol) is explored as a renewable maritime fuel, produced using CO₂ from direct air capture and green H₂ via electrolysis. A carbon footprint analysis assesses its sustainability. Results show that, if scaled, this system could cut maritime sector emissions by 50% by 2050.
Authors: Fei Kan, Hao Xu, Shuchang Tang, Josep Peñuelas, Xu Lian, Caspar T. J. Roebroek, Nazhakaiti Anniwaer, Kai Wang & Shilong PiaoSynopsis: Global forestation can cool near-surface air temperature (Ta) by 0.062 °C under current conditions, aiding climate mitigation. However, this cooling effect weakens as CO2 levels rise. Elevated CO2 alters local evaporative cooling and rainfall patterns, but the main reduction comes from changes in non-local temperature advection, especially in the Northern Hemisphere. Dynamic forest management is essential to maintain forestation’s mitigation potential amid climate change.
Authors: Milad Norouzpour, Rafael M. Santos, Yi Wai ChiangSynopsis: This review highlights mineral carbonation of mine tailings as a scalable CCS strategy, converting CO₂ into stable carbonates while repurposing waste. Tailings from various mines offer reactive Mg- and Ca-rich minerals, but activation methods must be tailored. Four approaches—mechanical, chemical, thermal, and engineered activation—are assessed for reactivity, cost, and scalability. Despite challenges, mine tailings offer strong potential for CO₂ sequestration and circular economy integration.
Authors: Naser Odeh, Julian David Hunt, Mohamad Hejazi, Yoshihide WadaSynopsis: This study evaluates CDR strategies for Saudi Arabia using multi-criteria decision analysis, considering performance, costs, environmental impact, and policy readiness. Five priority CDR groups are identified: energy-from-waste with carbon capture, direct air capture, biomass pyrolysis to biochar, nature-based solutions, and enhanced weathering. It recommends policies to shift waste to energy-with-CCUS and use industrial waste heat for direct air capture, guiding CDR advancement in the Kingdom.
Authors: Simon Rufer, Tal Joseph, Zara Aamer, Kripa K. VaranasiSynopsis: This study addresses performance challenges in electrochemical CO₂ capture using hydroxide solutions by introducing a carbonate/hydroxide separation step via nanofiltration. This separation enhances electrochemical current efficiency up to six-fold without reducing CO₂ absorption rates. Applied to Direct Air Capture, the method lowers costs by 20-30% and improves system flexibility. The approach also has potential for point source capture and integrated CO₂ capture-conversion systems.
Authors: Jack Longman, Benjamin J. W. Mills & Andrew S. MerdithSynopsis: In this study, the SCION climate-biogeochemical model is used to assess how large igneous provinces (LIPs) affect long-term climate. Only the Central Atlantic Magmatic Province (CAMP) shows minor long-term cooling (1–2 °C) and a clear Sr isotope signal, due to its tropical location. Other LIPs have limited climate impact, suggesting that most do not drive significant global cooling over multimillion-year timescales.
Authors: S. Mallya Sivamanjari, K. Jesitha, M.S. Sreekala, Sabu ThomasSynopsis: Metal-organic frameworks (MOFs) offer tunable structures ideal for CO2 capture but are fragile. Integrating MOFs with nanocellulose—a renewable, strong, flexible, and low-cost bio-material—enhances stability and performance. This review covers NC-MOF synthesis, CO2 adsorption mechanisms, efficiency, limitations, and future potential, highlighting their promise in mitigating carbon emissions and combating air pollution.
Authors: Xinru Wang, Lei Zhang, Bingbing Chen, Tao Yu, Mingjun Yang, Qiang Fu, Weixin Pang, Yongchen SongSynopsis: This study examines how injection strategy affects CO₂ hydrate formation in deep-sea sediments using marine soil from the South China Sea. Water injection creates more heterogeneous hydrate layers and achieves twice the CO₂-to-hydrate conversion of CO₂ injection. Hydrate forms uniformly in CO₂ injection but starts near the port in water injection. A multi-stage CO₂ injection approach boosts storage 28-fold, offering valuable insights for safe, long-term deep-sea CO₂ sequestration.
Authors: Yifan Xu, Mrityunjay Singh, Cornelia Schmidt-Hattenberger, Márton Pál Farkas, Wolfgang Weinzierl, Tomas Fernandez-SteegerSynopsis: This study presents a novel multicriteria site selection method for CO₂ storage to support Direct Air Capture and Carbon Storage (DACCS). Combining the Analytical Hierarchy Process with decision-making, it prioritizes sites based on capacity, injectivity, trapping, containment, and cost. Applied to the North German Basin, the approach identifies promising storage sites and offers a transparent, scalable framework for global DACCS site selection, incorporating expert-weighted criteria and uncertainty analysis.
Authors: Gavin Mouat, Christopher Galik, Aranya Venkatesh, Katherine Jordan, Aditya Sinha, Paulina Jaramillo & Jeremiah X. JohnsonSynopsis: In the absence of federal climate policy, 23 U.S. states pursuing net-zero targets could cut emissions by 46% by 2050, though this falls short of global climate goals. State-led action increases system costs by 0.7% and shifts more emissions to the power sector via greater electrification. Regional strategies vary, with solar, wind, storage, and direct air capture playing key roles. Results highlight how state and federal pathways differ in technology use despite achieving similar emissions cuts.
Share Carbon Removal Updates WEB POSTSCDR has three jobs, only one needs permanence (Marginal Carbon) Marginal CarbonThere is currently much discussion about when permanent carbon removal should be required and when removals with a higher risk of reversal may be accepted. I believe people are talking past one another, conflating the three use cases of carbon removal… 3 days ago · 6 likes · 2 comments · Robert Höglund Current state of play: Ability to pay by company type (2024) ( Fastmarkets) THESESAuthors: Ádám FüziSynopsis: This thesis compares eight Carbon Dioxide Removal technologies—including DACCS, BECCS, biochar, enhanced weathering, ocean alkalinization, ocean fertilization, afforestation/reforestation, and soil carbon sequestration—using literature review and SWOT analysis. Factors like readiness, cost, storage, mitigation potential, and social acceptance are evaluated to identify the most impactful CDR options for meeting the Paris goal of limiting warming below 2 °C.
Authors: Lindsey M HamblinSynopsis: This thesis explores integrating direct air capture systems with waste heat–producing industries to lower regeneration costs. A staged mechanism is proposed to amplify CO₂ concentration using vapor-liquid equilibria driven by thermal gradients. Simulations and bench-scale experiments confirm feasibility, with CO₂ amplification up to 30×. A data center case study and techno-economic analysis highlight potential for more efficient, cost-effective DAC deployment.
REPORTSUPCOMING EVENTSLAC 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 JOB OPPPORTUNITIES"The Global Sustainability team enables Google to build a more sustainable future for everyone by driving strategy and solutions. We drive the development and implementation of Google’s global sustainability strategy to further empower action, ensure alignment and prioritization, identify leadership opportunities, and mitigate risks. We drive sustainability strategy and programs on carbon, circular economy, water, product integration, reporting, and employee engagement, while serving as a sustainability leadership advocate internally and externally."
"The Carbon Business Council (CO2BC) is a global coalition of over 100 companies focused on developing and scaling carbon removal solutions to address climate change and boost the economy."
"Carbonfuture is the Trust Infrastructure for durable carbon removal. Today, the Trust Infrastructure consists of two products that seamlessly connect the entire carbon removal lifecycle: Carbonfuture MRV+, the most comprehensive MRV solution for durable CDR, and Carbonfuture Marketplace, the leading marketplace for durable CDR."
"Chestnut Carbon, is a nature-based solutions company committed to developing high-quality voluntary carbon offset projects as well as supporting the long-term conservation of American forests and empowering stewardship among family forest owners."
"Plantd is the quickest way to pull carbon from the atmosphere and transform it into useful, durable products. Starting with the homebuilding industry, we are leading a shift to carbon-negative building materials made from perennial grass and building the factory of the future to ensure carbon captured on the farm is locked away inside the walls, floors, and roofs of the places we live, work, and play."
"UNDO is tackling the greatest challenge of our time: climate change. We are a fast-growing for-profit business that is already one of the biggest carbon removal companies in the world."
"Skytree enables a transition to a world with cleaner Air for everyone. We do this by developing and deploying smart technology that captures atmospheric carbon dioxide, enabling its use or storage to combat climate change and aid society and businesses around the world."
"Yama is tackling the greatest challenge of our time: Climate Change. Our mission is to remove 1 billion tons of CO2 by 2050 through the development of the most energy-efficient and scalable Direct Air Capture (DAC) technology."
Looking for your dream job in CDR? There are 657 jobs available *right now*: check them all out at: CDRjobs Board Help secure the future of this service by choosing a paid subscription! PODCASTS"@geoengineering1 interviews Fabien Bardinet, co-founder of CIRCEO [linkedin.com/company/circeocc], a new company focused on marine-based carbon capture. CIRCEO is developing semi-autonomous sailing drones that generate electricity from wind to power onboard electrochemical systems that remove carbon from seawater. The company is currently hiring a CDR Electrochemist Co-founder: linkedin.com/jobs/view/4205443622."
"Scientists are clear that meeting climate goals means ending carbon pollution and drawing down excess CO2 from the air. That’s why carbon-removal technologies have proliferated over the past decade. But with the US government slashing climate incentives and programs, some companies are being forced to cut costs. This week Akshat Rathi speaks with Jan Wurzbacher, co-founder of Climeworks, a startup that pulls carbon dioxide from the air, about its first major layoffs and what the future holds for the most expensive climate solution."
"With emissions hitting record highs, carbon-dioxide removal is shifting from theoretical climate solution to commercial necessity. In this episode of ESG Currents, Bloomberg Intelligence Director of ESG Research Eric Kane speaks with AirMyne’s co-founder and COO, Mark Cyffka, and its CCO, Jan Huckfeldt, about the startup’s low-cost, scalable approach to direct air capture (DAC). They discuss why simplicity and heat efficiency are critical to scaling DAC, how waste heat from data centers can fuel removals and what sets the company’s liquid-based system apart from legacy approaches. The trio also unpacks why investors should care now despite high prices and the policy frameworks necessary to unlock the emerging market’s full potential."
"Anastasia Pavlovic is the co-founder of Eion, a carbon removal company that accelerates Earth's natural rock weathering process to lock away CO₂—permanently. Eion works with farmers to deploy enhanced rock weathering (ERW) in agricultural fields, creating a carbon sink disguised as soil amendment, with benefits to landowners and climate alike. Anastasia joined the podcast from Detroit to talk about carbon, kids, and the importance of remembering to eat."
"Last week, Microsoft signed one of the world’s largest carbon removal deals with carbon credit firm Rubicon Carbon, purchasing 18 million tonnes of carbon removal credits. But will investing in carbon markets necessarily reduce the urgency of reaching net zero emissions, and how large of a role should they play in the fight against climate change?In a special edition of the Frankly Speaking podcast, Richard Howitt was joined by Dr Daniel Klier, CEO of the climate consultancy South Pole, which describes itself as the world’s leading carbon project expert."
"In this episode, we’re joined by Meghan Pipitone, Advanced Project Engineer at Honeywell and co-inventor of life-sustaining technologies for spacecraft and marine environments. With a background in electrical engineering from the University of San Diego, Meghan has played a key role in developing CO₂ removal systems for NASA missions, including the groundbreaking Carbon Dioxide Removal by Ionic Liquid System (CDRILS)."
"Everyone's focused on carbon credit offtakes and Voluntary Carbon Market purchases, but the compliance markets represent the vast majority of carbon assets in circulation. How do these markets work, and how might carbon removal interact with them in the future?Mike Azlen is the CEO and CIO of Carbon Cap Management LLP, a firm which trades within various compliance markets.We discuss why private traders like his company can help price discovery in compliance markets, and address some common criticisms of market-based approaches to climate change (both VCM and compliance markets.)"
Share Carbon Removal Updates YOUTUBE VIDEOSRIP Norm(s), in CDR, American energy, and Cheers | Wicked Problems - Climate Tech Conversations "Maeve Allsup of Latitude Media and Robert Höglund of cdr.fyi talk the state of play in US energy chaos and carbon removals. And a tribute to George Wendt. RIP. Promise it will make sense. "
The Giga Ten Ep. 6 May 2025 | Tree Media "In this 6th episode of The Giga Ten we discuss how Microsoft is a huge buyer of removals in the space, how Climeworks might want to respond to that Icelandic paper and other CDR policy mechanisms emerging from the EU. This and much more in the following episode with Sebastian Manhart and Leila Conners."
DAC: "We need to start deploying and reducing costs now" | gasworld "Blair McMaster, Senior Consultant Carbon Capture at DNV, discusses direct air capture and the role that carbon removal will play in meeting global emissions targets on gasworld's CO2: Securing Supplies and Exploring New Pathways webinar."
Biochar: A Silver Bullet for Carbon Removal? | The Utopia Podcast "In this episode I speak with Tom Previte and his company, Restord, a pioneering start-up which is creating biochar as a carbon removal method in Cornwall.
We discussed some of the benefits and issues associated with scaling up biochar carbon removal projects as part of the UK’s net zero journey. We also discussed the controversies surrounding corporate purchases of carbon removal credits and the associated carbon offsetting claims."
CarbonX Funding Deep-Dive | Tencent x CRBC – How to Win Non-Dilutive Capital | Carbon Removal Breakfast Club "This episode covers:-What does Tencent’s CarbonX Program really look for?-How are projects scored across CDR, CCUS, CCU & LDES?
-Can a non-dilutive grant be stacked with private capital?"
Harnessing the Clean Industrial Deal and tools to fund CDR - Quarterly CDR Policy Update with remove | Carbon Gap "Navigating the European carbon removal policy ecosystem can be tricky. Both EU-wide and global CDR policies are relevant to all CDR startups, yet with constrained resources, many struggle to stay up to date. The Quarterly Policy Update series aims to address this need and provide this resource to a wide audience.
For the second instalment of 2025, in partnership with remove, we highlight how funding for CDR projects works in the EU, with clear examples and a database to track funding opportunities. We also look at the Clean Industrial Deal and how it can benefit R&I financing."
Workshop: Implementing A Low Carbon Concrete Building Code in your City. | OpenAir "Concrete is the most widely used building material on earth—foundational to roads, bridges, buildings, and virtually all modern infrastructure. Yet, it is also a major contributor to greenhouse gas emissions, primarily due to the production of cement, its key binding ingredient. Fortunately, there are proven materials and methods that can significantly reduce the embodied carbon of concrete with minimal or no added cost. Local governments play a critical role in enabling this shift by adopting low-carbon concrete standards into their building codes."
2025 Carbon Removal Challenge Showcase Stream | OpenAir "Tune in as we stream our 5 finalist student teams presentation of their award winning projects at Carbon Unbound! Please join us in celebrating our finalists teams in this culminating event for the 2025 Carbon Removal Challenge.Hosted by CRC co-chairs, Matt Parker and Sue Dorward, learn more about each team and their ground breaking approaches to carbon removal!"
Carbon Removal Updates from 19 May - 25 May 2025 | Carbon Removal Updates BulletinDEADLINESFollow us on:Twitter | Bluesky | LinkedIn | YouTube | Substack | Podcast 1 | Podcast 2
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