DAC+S methodology validated by DNV - developed and implemented by Climeworks and Carbfix as partners for permanent carbon removal

News | 19.09.2022

Key take-aways:

  • Climeworks and Carbfix developed the world's first full-chain methodology dedicated to carbon dioxide removal via direct air capture and underground mineralization storage. This methodology has been validated by the independent quality and assurance leader DNV.
  • It provides the requirements for stringent standards by which measurement and reporting of Climeworks' carbon dioxide removal and Carbfix‘s permanent mineralization can be third-party verified.
  • With this methodology, Climeworks and Carbfix aim to contribute to the standardization and scale-up of high-quality, permanent removals. 
Climeworks developed a methodology for CDR via DAC+S with Carbfix and DNV

A robust assessment of carbon dioxide removal (CDR) methods is needed to provide high-quality services to private and corporate customers, as well as to make contributions toward a carbon market that is regulated and better understood.  

Climeworks, Carbfix, and DNV have partnered to develop the world’s first full-chain methodology dedicated to CDR via direct air capture (DAC) and underground mineralization storage. The methodology has been validated in line with ISO 14064-2 and verifies the integrity of Climeworks’ CDR, thus enabling the delivery of third-party verified CDR, and leading industry action with high environmental integrity.  

The two modular methodologies focusing on 1) DAC, and 2) storage through permanent underground mineralization provide the requirements for stringent standards by which measurement and reporting of Climeworks’ CDR and Carbfix's permanent mineralization can be third-party verified and communicated to customers. With these much-needed methodologies, Climeworks and Carbfix aim to contribute to the standardization and scale-up of high-quality, permanent removals.    

The methodologies set criteria for high environmental integrity CDR and take a rigorous stance on safeguarding quality. They were validated by DNV, a global leader in quality assurance, by advising on the principles of methodology development and ensuring robustness and accuracy of the approach. 

DNV then conducted an onsite audit, where a review of documentation, interviews with staff, and site inspection verified that Climeworks is producing CDR, and Carbfix is mineralizing CO₂ underground, in accordance with those methodologies.   

DNV concluded the audit by verifying Climeworks’ CDR via Climeworks’ DAC and Carbfix’s mineral storage technologies, to be:  

  • Reported accurately, avoiding any chance of double counting or inclusion of removals that cannot be supported by measured data, 
  • Measured accurately and reflecting the net emissions removed after adjusting for emissions resulting from plant construction, operation, and disposal in compliance with ISO 14064-2 Standards, 
  • Strict, transparent, and accountable to the monitoring procedure in place to detect any involuntary release of CO₂ and changes within the storage reservoir that may risk the permanence of CO₂ storage.  

Climeworks and Carbfix are proud to have developed and implemented the first full-chain methodology for CDR via DAC+S, in close consultation with and validated by DNV. 

Climeworks welcomes public and industry experts to contribute to the conversation about high-quality standards by reviewing and commenting on the validated methodologies at [email protected]

Editor's note: the content of this page was updated on May 8, 2023.

“Even after ten years of successfully operating subsurface mineralization of CO₂, and with over one hundred peer-reviewed scientific articles published on our approach, it is a major milestone to have established an independently validated methodology. It is the first validated methodology to address subsurface mineralization, a mature and robust technology we have developed to use nature’s way of storing CO₂ by transforming it into stone. I’m proud of our team and collaborators for this important achievement”, says Edda Aradóttir, CEO of Carbfix

“In order to achieve our climate goals, we need to find scalable solutions for CO₂ storage. Only rigorous carbon accounting can ensure the environmental integrity of such projects. Our first carbon capture and mineral storage methodology provides the tools to ensure its safe application while making the climate benefits transparent, measurable, and permanent”, says Thomas Ratouis, Measurement, Monitoring & Verification at Carbfix

“We were pleased to be involved in this significant project with Climeworks and Carbfix, the first time that the removal capacity of a DAC+S installation has been validated and verified using ISO 14064-2. DNV performed a training and pre-assessed the early drafts of the developed methodology in order to enable a smooth validation process. Following the successful validation of the methodology and project design documents, DNV was able to successfully verify the implementation of the project and the production of CDR at the Orca plant”, says Edwin Aalders, Senior Principal Scientist at DNV Supply Chain & Product Assurance

Climeworks' Orca facility is the world's first direct air capture and storage plant in commercial operations:

Lead the race against global warming