Microsoft Backs Massive CO Removal Plan with Pulp & Paper Mill Integration

A Bold Leap in Carbon Removal: Microsoft and CO280 Partner to Tackle Industrial Emissions

In a groundbreaking move that could reshape the future of carbon removal technologies, Microsoft has struck a multimillion-ton carbon offtake deal with CO280, a startup focused on biogenic carbon capture tied to pulp and paper mills. This strategic partnership could usher in a new era of scalable, industrial carbon removal—one that taps into existing infrastructure while mitigating global emissions through innovative engineering.

Founded in 2021, CO280 has quietly emerged as a serious player in the carbon removal space. With backing from major investors and now two major buyers—Microsoft and the Frontier consortium—the startup is aiming to revolutionize how industries remove carbon from the atmosphere. Their unique value proposition lies in retrofitting pulp and paper mills, using existing biomass processes, and deploying advanced capture technology to permanently sequester CO2.

Here’s an in-depth look at what this partnership means, how it works, and the ripple effects it could have on carbon markets and climate action at large.

Microsoft’s CO2 Deal with CO280: All You Need to Know

Microsoft has signed a carbon removal deal with CO280 for 3.7 million tons of CO2 over the next 12 years, marking one of the largest corporate purchases in the carbon capture space.
This comes after a prior $48 million agreement between CO280 and the Frontier consortium for 224,500 tons of CO2 removal between 2028 and 2030.
CO280’s approach leverages pulp and paper mills, specifically the recovery boilers where biomass waste is burned, which naturally emit biogenic CO2—carbon that was originally absorbed by trees.
Instead of letting this CO2 re-enter the atmosphere, CO280 installs carbon capture systems on boiler stacks and pipelines the gas to permanent storage sites.
The key innovation lies in utilizing a “closed-loop” biological process, where trees sequester carbon and the emissions from processing them are captured before release.
CO280 is currently partnering with a major Gulf Coast-based pulp and paper mill, though the name of the company remains undisclosed.
The project is structured as a joint venture, allowing the mill to participate in both emissions reductions and long-term economic returns from carbon credits.
The company plans to launch the first phase in 2029, capturing 400,000 tons of CO2 annually.
CO280 CEO Jonathan Rhone emphasized the scalability of this model, noting that more than a dozen projects are already in active development.
Microsoft’s deal helps provide “bankable offtake certainty,” which unlocks private financing to cover the hundreds of millions in capital costs.
The capture technology is being provided by SLB Capturi, a known player in carbon solutions.
CO280 has raised capital from Toyota Ventures, the Grantham Foundation, NPG Energy Capital, and others—but has not publicly disclosed funding amounts.
Another major CO2 buyer is confirmed to be onboard, though their identity has yet to be announced.
Rhone says the price per ton remains under $200, a competitive rate for permanent CO2 sequestration.
Microsoft’s Brian Marrs called the CO280 approach a “proven blend of engineering innovation and commercial readiness.”
The approach is particularly compelling because it doesn’t require new industrial buildouts—it repurposes existing, high-emitting infrastructure.
This deal helps Microsoft progress toward its ambitious goal of being carbon negative by 2030.
CO280 is positioning itself as a template for industrial decarbonization, which could be replicated across North America and beyond.

What Undercode Say:

CO280’s model marks a significant departure from conventional carbon removal ventures that often struggle with cost, scalability, or reliability. What makes this project stand out is its blend of industrial integration, biological logic, and commercial appeal. Let’s unpack this:

Scalability is baked into the design. By targeting pulp and paper mills, CO280 isn’t building new infrastructure—they’re piggybacking on a legacy industrial sector that’s widespread, heavily emitting, and under pressure to decarbonize.
Biogenic carbon is a natural fit for long-term storage. Since the CO2 in question was absorbed from the atmosphere by trees, it’s fundamentally different from fossil-based emissions. This adds a layer of credibility and sustainability to the carbon accounting.
Financial viability is more than a buzzword here. With Microsoft and Frontier committing to long-term purchases, private investors have the predictability they need to fund the high upfront costs of deployment. This is crucial for turning promising tech into operational reality.
CO280’s approach is modular. Once the first project proves successful, the same boiler-based capture systems can be replicated in other mills, potentially scaling to millions of tons of CO2 removal annually.
Timing aligns with climate urgency. With mounting pressure on corporations to meet net-zero goals, plug-and-play carbon solutions that are ready to deploy by 2029 are incredibly attractive.
Cost efficiency is key. Pricing under $200 per ton places CO280 in a sweet spot, especially compared to other permanent removal options like direct air capture, which often exceed $500 per ton.
The role of policy and credits cannot be overstated. As carbon markets mature, having verified, high-integrity carbon removals like CO280’s could command premium value and regulatory backing.
Partnerships matter. Microsoft’s endorsement isn’t just about emissions—it’s a signal to other tech and industrial giants that this model is worth watching and potentially emulating.
Technological trust is anchored in proven solutions. Using SLB Capturi gives this project an extra layer of engineering credibility and reduces technological risk.
It also tells a compelling climate story. A startup working with century-old mills to reverse emissions—it’s the kind of narrative that resonates with investors, policymakers, and the public.

This model may not solve climate change alone, but it’s carving a vital niche in the carbon removal landscape: making hard-to-abate sectors part of the solution.

Fact Checker Results

Microsoft’s carbon deal with CO280 has been officially reported and aligns with CO280’s disclosed roadmap.
Biogenic carbon capture via pulp mills is a credible method, validated by third-party engineering partners like SLB Capturi.
The sub-$200/ton pricing is consistent with publicly available claims from CO280’s official sources.