Geoengineering Info Profile picture
May 23, 2023 10 tweets 4 min read Read on X
"Using seawater & low-carbon electricity, @ebbcarbon can remove gigatons of CO2 permanently at competitive costs."

#ElectrochemicalOceanAlkalinityEnhancement
#CarbonDioxideRemoval

Take a step-by-step walkthrough of how their solution works in a 🧵 below ⬇️

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1️⃣ "@ebbcarbon with aquaculture farms, desalination plants, ocean research labs, and other industrial sites that process seawater."
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2️⃣ "Ebb intercepts existing salt water flows at the facility and processes the water before it returns to the ocean."
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3️⃣ "Using low carbon electricity, Ebb run the salt water through a stack of ion-selective membranes that separate it into acidic and alkaline solutions."
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4️⃣ "Ebb measure and monitor the pH level and volume of the alkalinity we produce in real time. This enables us to safely return it at levels within the ocean's natural pH variance."
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5️⃣ "Ebb return the alkaline solution to the sea, where it immediately lowers the acidity of the sea water locally."
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6️⃣ "Over weeks to months, the alkaline solution reacts with dissolved CO2 in seawater to create bicarbonate (HCO3), a stable form of carbon storage for 10,000+ years."
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7️⃣ "With more CO2 locked away as bicarbonate, the ocean will naturally equilibrate and sequester more CO2 from the air. Ebb measures the CO2 removed from the air using sensors in the water and ocean and carbonate chemistry models."
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8️⃣ "By partnering with the ocean, Ebb Carbon has the potential to be one of the most energy efficient and cost effective ways to reverse the impacts of climate change both locally and globally."
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Learn more about @ebbcarbon
here ⬇️ ebbcarbon.com/solution

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More from @geoengineering1

Jan 7
🚨Two recent engineering studies examine whether H2-powered aircraft can reliably deliver large payloads to the lower stratosphere for #SAI.

The papers compare a conventional tube-wing aircraft & a canard-wing alternative, analyzing design feasibility & performance limits🧵1/14 Image
2/ Delivering aerosols to these altitudes with large payloads is difficult using existing aircraft.

Both studies explore H2 propulsion b/c it offers high gravimetric energy density & zero CO₂e, potentially enabling long-duration missions without adding direct C emissions
3/ To enable comparison, both designs are evaluated against the same core mission:

• Climb and cruise at 65,000 ft
• Sustain flight for ~3.5 hours
• Deliver a ~50,000 lb aerosol payload
• Operate near aerodynamic and propulsion limits typical of the lower stratosphere
Read 15 tweets
Jan 1
🚨Agroforestry can lock away carbon and boost farmer livelihoods, but weak, costly measurement blocks smallholders from #carbon markets.

A new study introduced an AI-powered, smartphone-based MRV system that accurately measures tree carbon at scale.

DETAILS🧵1/11 Image
2/ Context: Carbon markets require precise Measurement, Reporting & Verification (MRV).

For smallholder agroforestry, traditional methods are labor-intensive, expensive & hard to scale. As a result, farmers are locked out of climate finance.
3/ So, in this study researchers used an approach "DiameterAlgorithm," a non-contact method that estimates tree diameter (DBH) from a single photograph.

Instead of manual tapes or costly sensors, it relies on computer vision and a simple reference tag placed on the tree. Image
Read 13 tweets
Dec 31, 2025
🚨Monthly Solar Geoengineering Updates (Dec Edition)

From NCAR’s possible shutdown & the Guardian’s sun-dimming debate to an African-led #SRM hub, the EU’s first governance conference & new studies, SRM dominated headlines and labs alike.

Top 10 SRM Highlights (Dec 2025)🧵1/8 Image
1️⃣ Trump administration plans to dismantle NCAR, a leading hub for climate & SRM research

2️⃣ Guardian editorial sparks debate, warning of “sun-dimming” under political control. In response, letters argue research shutdown stifles science & misrepresents African perspectives.

2/ Image
3️⃣ DSG launches SRM Governance Horizons, a project to assess institutional readiness and inclusive governance for solar radiation modification debates.

4️⃣ Sandro Vattioni wins China’s 2025 Pineapple Science Award for research on diamond dust as a potential SRM material.

3/ Image
Image
Read 9 tweets
Dec 24, 2025
🚨What if old clothes could power cities & remove CO₂?

New study shows that modular bioenergy with carbon capture (#BECCS) using discarded textiles can cut emissions, beat landfilling on env impacts & deliver durable #CDR at costs competitive with today’s CDR markets.

🧵1/10 Image
2/ ~92 Mt of textile waste are generated globally each year. Roughly half is biogenic (e.g., cotton), meaning it already represents stored atmospheric CO₂ captured by plants during growth.

Yet ~66% of US textiles are landfilled, releasing GHGs & pollutants over time.
3/ In this study, researches model a 100 t/day modular waste-to-energy plant using:

• 100% cotton textiles
• 50/50 cotton–PET blends

Each case is assessed with and without CCS and compared to landfilling using full LCA + techno-economic analysis. Image
Image
Read 11 tweets
Dec 17, 2025
🚨Can land-based and ocean-based #CarbonRemoval work together, without undermining each other?

A new Earth system modeling study shows that combining BECCS & OAE delivers near-additive CO₂ removal, cutting ~23 ppm by 2100, while exposing critical Earth-system feedbacks.

🧵1/11 Image
2/ As emissions cuts lag, most 1.5–2°C pathways now rely on carbon dioxide removal.

But the real question isn’t which CDR method is best, it’s what happens when multiple CDR approaches are deployed together inside the real climate system.
3/ To answer this, researchers used the Norwegian Earth System Model, simulating the period from 2030 to 2100 under an overshoot scenario where CO₂ first rises, then falls into net-negative territory.

This allowed them to track long-term land, ocean, and atm responses. Image
Read 12 tweets
Dec 11, 2025
🚨'Rock candy' technique offers simpler, less costly way to capture C directly from air

U of Toronto engineers have developed a cheap, passive, string-based #DAC system that crystallizes CO₂ like “rock candy,” potentially cutting capital costs by up to 40%.

How it works🧵1/11
Direct air capture has existed for decades, but it’s expensive. Giant fans, complex chemical plants, and energy-intensive regeneration steps drive up costs. That’s the main criticism of today’s DAC industry.
U of Toronto researchers tackled the problem with a simple question:
What if we could let nature do most of the work?

Their answer: evaporative carbonate crystallization, a passive, wind-powered approach.
Read 12 tweets

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