Octavia Kenya Direct Air Capture

Capturing and permanently storing 10,000 tonnes of CO₂ over the project's 10-year lifetime.

Octavia Carbon is the Global South’s first Direct Air Capture (DAC) company based in Kenya that designs, builds, and deploys machines able to capture carbon dioxide (CO2) from the atmosphere. By harnessing Kenya's renewable energy, geology, and talent, DAC can be deployed at a low cost to accelerate climate innovation in Africa.

In partnership with Cella, a carbon mineralization company, Octavia Carbon is set to build the first DAC + Storage plant in the southern hemisphere, known as Project Hummingbird. Located along the Kenyan Rift in Naivasha town, Project Hummingbird will capture and permanently store 10,000 tonnes of CO2 during its 10-year lifetime.

Octavia’s DAC approach integrates geothermal waste heat into their process to overcome the traditionally energy-intensive nature of DAC, cutting down their DAC electricity requirements by ~85%. Additionally, Octavia is building one of the world's most modular DAC machines with their latest model, Lenana, with a capacity to capture 10 tonnes of CO2 a year, and a total of 100 Lenanas deployed to the project.

Leveraging the geology along the Kenyan Rift, Cella will inject the captured CO2 underground into basalt rock layers. The CO2 will be transformed into carbonate minerals through chemical reactions, locking away the CO2 permanently for millions of years.

Beyond carbon removal, Project Hummingbird and subsequent scale ups have the potential to lower energy costs for Kenya’s rural and urban communities. On average, 1000 MWh of geothermal electricity is wasted daily in Kenya due to lack of adequate demand. This leads to increased electricity costs for end consumers, who bear the cost of the excess capacity generated.

By utilizing this excess capacity, Project Hummingbird and its successors will incentivize the government to expand the grid’s capacity, thus increasing energy access to rural and urban communities and decreasing electricity costs for low-income Kenyans. The project will also create green jobs for local pastoral communities whose livelihoods have been stripped by prolonged droughts.

Project Hummingbird will be validated against the Puro.earth Geologically Stored Carbon Standard and will likely be the first DAC + Storage project validated against an MRV methodology endorsed by the International Carbon Removal and Offsetting Alliance (ICROA). Commercial operations of the plant will begin mid-2024.

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Project location

Technology and mechanism

Centralized Direct Air Capture
Using giant fans on industrial plants to capture atmospheric air and passing the air through a filter that absorbs CO₂.
Permanence: 1000+ years
The durability of this project is extremely high as a result of the technology used. Captured CO₂ will be injected underground into basaltic rock layers, abundant in the Kenyan Rift Valley and recognized as natural CO₂ reservoirs. These basalt rocks are porous and permeable, allowing the CO₂ to be transformed into carbonate minerals through mineralization. Once this process occurs, the CO₂ is locked away for millions of years with minimal to no risk of leakage. This is due to the thermodynamic properties of the mineralized carbon, which makes it highly durable and resistant to chemical weathering. Decarbonization of mineralized carbon can only occur in temperatures above 700⁰C, in the absence of which, the carbon dioxide remains securely stored.

Project certifications

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Registry ID

Project registration date

Most recent Jan 10, 2024

Crediting period term

Oct 01, 2024 - Jul 01, 2034

Project methodology

Updated Jan 01, 2021

Project design document (PDD)

Updated Jun 01, 2023
Octavia has shared their LCA because Puro does not require a PDD.

Current verifier of project outcomes


Project details

Emissions reduced or carbon removed on an annual basis
1,000 tonnes
How the project approaches risk of reversal
The project mitigates reversal risk through comprehensive risk assessment, management, and monitoring. Following the standard DAC process, the project's storage partner will inject the captured CO₂ into basaltic rock formations for permanent storage through mineralization. The likelihood of the mineralized carbon being reversed is minimal unless it is exposed to temperatures higher than 700⁰C, which typically only occurs during significant tectonic or volcanic events. To minimize this reversal risk, the storage partner will conduct a comprehensive site characterization study to identify any potential fractures in the injection area. Additionally, the CO₂ will be injected in an area with a caprock, preventing the buoyant CO₂ from reemerging before complete mineralization. Continuous monitoring of the evolution of the injected CO₂ will ensure that potential reversal risk is promptly identified and corrective measures are taken.
What actions would be taken by the project developer if anticipated emissions reductions do not take place, or if carbon removal is reversed in the future?
In the event of a potential reversal, affected parties will be promptly notified through the project's open communication channels. Buyers will have clawback provisions allowing them to reclaim previously issued credits lost through reversals. Compensation for such instances will be sourced from the project's unallocated credits of -140tCO₂/yr when necessary. The project developer is also open to collaborating with affected buyers to develop a fair and transparent alternative compensation plan for any lost credits.
What calculation methods are used to independently reproduce and verify the carbon impact of the project?
Please refer to Section 4 in the methodology document.
Citation: Methodology
United Nations Sustainable Development Goals
Affordable and Clean Energy
Ensure access to affordable, reliable, sustainable and modern energy for all
Industry, Innovation and Infrastructure
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
Sustainable Cities and Communities
Make cities and human settlements inclusive, safe, resilient and sustainable
Responsible Consumption and Production
Ensure sustainable consumption and production patterns
Climate Action
Take urgent action to combat climate change and its impacts
Life Below Water
Conserve and sustainably use the oceans, seas and marine resources for sustainable development

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