Spiritus | This Carbon Removal Startup Is Eyeing a Major Price Milestone

This Carbon Removal Startup Is Eyeing a Major Price Milestone

With its Orchard One project in Wyoming, Spiritus thinks it can capture carbon from the air for less than $100 per ton.

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Pretty much every startup that’s building machines to suck carbon dioxide from the atmosphere and stash it underground has claimed it will be able to get its costs down to less than $100 per ton — eventually.

But a new contender in the race, a San Francisco-based company called Spiritus, is making a compelling case that it could get there faster. On Tuesday, Spiritus announced plans to build its first direct air capture, or “DAC” project in central Wyoming, nicknamed Orchard One. The company will start small but ultimately wants to expand the facility to capture 2 million tons of CO2 per year.

Achieving that scale at the sub-$100 price point would be game-changing for direct air capture, which is still far too expensive to be a viable climate solution. Most companies in the field are cagey about revealing their current costs, but the industry-average price is believed to be between $600 and $1,000 per ton.

So what makes Spiritus different? Here are three reasons we’ll be keeping an eye on the company.

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It’s making use of a potentially … fruitful new material

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Spiritus’ project will not look anything like the industrial-style shipping containers full of fans that have become the defining form factor for DAC plants. The company’s central innovation is a squishy white ball that founder Charles Cadieu describes as an artificial lung.

“While it looks kind of simple, it's actually a breakthrough material that has an incredible amount of surface area,” he told me over Zoom, while holding one up and squeezing it like a stress relief toy. “And it has holes all over it that allow the CO2 to go right inside.” Though it’s about the size of a tennis ball, its branch-like interior structure has a surface area equivalent to a tennis court, he said.

A hand holding the Orchard One \u201cfruit.\u201d — Courtesy of Spiritus

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The ball is made of a proprietary material that selectively attracts CO2 molecules. As air wafts through it, CO2 sticks to its interior surfaces like a magnet. Spiritus will manufacture millions of these balls, lay them out on trays, and stack the trays on tree-like rigs — hence the name Orchard One. Concept images depict a small colony of cylindrical structures that will house the trays, almost like miniature Wilco towers, sprouting up amid the Wyoming sagebrush.

Orchard One rendering. — Courtesy of Spiritus

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After a few hours exposed to the elements, the balls, which Spiritus prefers to call “fruits,” will be full of carbon. The company will then transfer them to a separate chamber and apply heat, causing them to expel the CO2. That stream of carbon will be compressed and delivered to an underground CO2 storage well, while the fruits will be returned to their towers to live the same day over and over again.

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It requires a lot less energy

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Though the concept is somewhat whimsical, the company is making serious claims about its cost and performance. The biggest expenses for direct air capture projects are materials and energy, and Spiritus has made significant improvements on both fronts. Cadieu told me they can manufacture their sorbent for a tenth of the cost of other, “state of the art sorbents that are out there today,” and that “furthermore, it’s 10 times as effective” at capturing carbon. In other words, Spiritus claims it can capture more carbon from the air at a time, using fewer, cheaper materials than other methods.

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Since the capture part of the process is passive, the company doesn’t need to use energy-intensive fans to filter the air. Also, the temperature required for the second step, where heat is applied to the balls to release the CO2, is lower than 212 degrees Fahrenheit — low enough to be generated using electricity. Cadieu said Spiritus plans to procure energy from renewable sources so that the entire process has net-negative greenhouse gas emissions.

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Spiritus isn’t the only company with a low-cost sorbent and passive capture method. Notably, the DAC process pioneered by Heirloom, which opened its first commercial-scale plant in California last year, shares those features, but it requires much higher temperatures — 1,650 degree Fahrenheit — to isolate the captured carbon.

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Though Spiritus still has to prove this all works as promised in the real world, the company has earned an early vote of confidence from Frontier, the coalition of tech companies with a $1 billion fund to help carbon removal scale. Last year, Frontier paid Spiritus $500,000 to buy its first 713 removal credits, each of which represents a ton of carbon that will be permanently sequestered underground. (The money is more of a development grant than anything indicative of the company’s costs.)

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“We look for companies that learn and iterate quickly, and we were impressed by what we saw from Spiritus when they applied,” Joanna Klitzke, the procurement and ecosystem strategy lead at Frontier, told me. “And actually, since then, the team has made really strong improvements and steady progress on both their sorbent and their process performance.”

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According to the company’s application for funding from Frontier, Spiritus estimates that for the first phase of Orchard One — when the project is capturing less than 2,000 tons per year — its levelized cost per ton of carbon will be about $149, not including the cost of burying the carbon underground. By phase two, at a scale of about 500,000 tons per year, it expects to get that cost down to less than $100. And by phase three, at the full scale of 2 million tons per year, it expects to achieve sub-$75 capture.

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Cadieu told me the company is already in talks with large buyers to purchase carbon removal from Orchard One for “far less” than the per-ton price Frontier paid.

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It’s following the three rules of real estate: location, location, location

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Spiritus doesn’t expect to have phase one of the project up and running until 2026. But it already has a running start. The land lease is locked down, the underground pore space where the company will inject the captured carbon has been identified, and a monitoring well is already scheduled to be drilled — according to its Frontier application.

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Wyoming has proved to be a relatively welcoming place for this emerging industry. Orchard One is joining another direct air capture plant already under development in the southwest part of the state called Project Bison. Cadieu gave three reasons the project landed there: There’s a local workforce with relevant experience from the oil and gas industry, the state has the ideal geology to trap the captured carbon underground, and Wyoming has been at the forefront of developing clear regulations for carbon sequestration. It was one of the first states to gain authorization from the Environmental Protection Agency to permit carbon storage wells, and as of December had already permitted three. Another advantage in Wyoming is abundant renewable energy from wind farms.

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Spiritus has yet to reveal exactly where in Wyoming Orchard One will be built, but Cadieu told me he has been in close contact with officials at the town, county, and state levels, and that the reception has been enthusiastic. He said the project will create “hundreds of jobs during construction” and “many dozens of jobs” when the facility is operating, and that the company will deliver a portion of its profits back into the community.

Rewind.earth

Biomass carbon removal and storage

Tel Aviv, Israel

R&D

Rewind.earth uses cranes off of boats to sink agricultural and forest residues to the oxygenless bottom of the Black Sea, the largest anoxic body of water on Earth. Oxygenless water dramatically slows biomass decomposition. The lack of living organisms in the Black Sea limits any potential ecosystem risks. This process allows for affordable and environmentally safe carbon removal.

Carboniferous

Biomass carbon removal and storage

Houston, TX, US

R&D

Carboniferous sinks bundles of leftover sugarcane fiber and corn stover into deep, salty, oxygenless basins in the Gulf of Mexico. The lack of oxygen in these environments–and therefore absence of animals and most microbes–slows the breakdown of biomass so it is efficiently preserved and stored durably in ocean sediments. The team will conduct experiments to determine the functional stability of sunken biomass as well as the interaction with ocean biogeochemistry.

Vycarb

Ocean alkalinity enhancement

Brooklyn, NY, US

58 tons

Vycarb uses a reactor to add limestone alkalinity to coastal ocean water, resulting in the drawdown and storage of atmospheric CO₂. Their dissolution system has a novel sensing apparatus that base tests water, dissolves calcium carbonate, and doses alkalinity into the water at a controlled amount safe for dispersion. Their closed system makes it easier to measure the amount of dissolved alkalinity added and CO₂ removed.

Arbon

Direct air capture

New York, NY, US

173 tons

Arbon uses a 'humidity-swing' process to capture CO₂ from the air. The sorbent binds CO₂ when dry and releases it when wet. This process uses less energy than approaches that rely on changing temperature and pressure to release CO₂. The sorbent’s ability to bind CO₂ has been shown to remain stable over thousands of cycles. Both of these innovations could reduce the cost of DAC.

Vaulted

Biomass carbon removal and storage

Houston, TX, US

1,666 tons

Vaulted injects organic waste into durable wells, where the carbon in the waste is sequestered as it decomposes. Using a specialized slurry injection technology, their process can handle a wide range of organic carbon sources with minimal energy and upfront processing. Their system has the potential to be deployed quickly at large scales.

Spiritus

Direct air capture

Los Alamos, NM

713 tons

Spiritus uses a sorbent made from commercially-available materials and a passive air contactor that requires little energy to capture CO₂. The CO₂-saturated sorbent is then regenerated using a novel desorption process, capturing the CO₂ and allowing the sorbent to be reused with less energy than a higher-heat vacuum chamber typically used in direct air capture approaches. The high-performance, inexpensive sorbent and lower regeneration energy provide a path to low cost.

Planetary

Ocean alkalinity enhancement

Nova Scotia, Canada

937 tons

Planetary harnesses the ocean for scalable removal. They introduce alkaline materials to existing ocean outfalls like wastewater plants and power station cooling loops. This speeds up the sequestration of CO₂ safely and permanently as bicarbonate ions in the ocean. Planetary then verifies the removal through advanced measurement and modeling techniques.

Mati

Enhanced weathering

US and India

1,513 tons

Mati applies silicate rock powders to agricultural fields, starting with rice paddy farms in India. These rocks react with water and CO₂ to produce dissolved inorganic carbon that is subsequently stored in the local watershed and eventually in the ocean. Mati relies on rice field flooding and higher subtropical temperatures to accelerate weathering, and extensive sampling and soil and river modeling to measure removal and deliver co-benefits to smallholder farmers.

Holocene

Direct air capture

Knoxville, TN, US

332 tons

Holocene captures CO₂ from air using organic molecules that can be produced at low cost. In the first step of their process, CO₂ is captured from air when it comes into contact with a liquid solution. In the second step, a chemical reaction crystallizes the material as a solid. That solid is heated up to release the CO₂, minimizing energy wasted in heating water. Holocene’s process runs at lower temperatures, further reducing the energy required, increasing energy flexibility, and lowering overall cost.

EDAC Labs

Enhanced weathering

Baltimore, MD, US

317 tons

EDAC Labs uses an electrochemical process to produce acid and base. The acid is used to start the recovery of valuable metals from mining waste, and the base is used to capture CO₂ from air. The acid and base streams are then combined to produce metals that can be sold for applications such as batteries, and solid carbonates, which permanently store CO₂.

CarbonRun

Ocean alkalinity enhancement

Nova Scotia, CA

1,291 tons

CarbonRun enhances the natural ability of river currents to weather abundant, low-cost limestone and reduce river acidity levels. This benefits river ecosystems locally and enhances the rivers’ ability to capture CO₂ from the atmosphere. Rivers, which are natural carbon transport systems, then deliver CO₂ to the ocean for permanent storage in the form of bicarbonate.

CarbonBlue

Direct ocean removal

Haifa, Israel

400 tons

CarbonBlue uses calcium in a closed-loop cycle to mineralize, separate, and remove dissolved CO₂ from water. This results in a pure stream of CO₂ that can be durably sequestered. Their approach can operate in freshwater or saltwater and can rely on waste heat for the regeneration process. The team plans to integrate with desalination plants and other water-withdrawing industries, reducing energy usage and costs.

Carbon Atlantis

Direct air capture

Munich, Germany

275 tons

Carbon Atlantis is using a process known as electrochemical pH-swing. Their system uses a solvent to capture CO₂ and an acid to release it. This approach is inspired by recent innovation in Proton Exchange Membrane fuel cells and electrolyzers, making the process both cost-effective and energy-efficient. The CO₂ is then run through

Banyu Carbon

Direct ocean removal

Seattle, WA, US

360 tons

Banyu Carbon uses sunlight to capture CO₂ from seawater. A reusable, light-activated molecule that becomes acidic when exposed to light causes carbon dissolved in seawater to degas as CO₂, which is then stored permanently. Because only a small portion of the visible light spectrum is needed to trigger the reaction, this is a highly energy-efficient approach to direct ocean removal.

Alkali Earth

Enhanced weathering

Northfield, MN, US

1,351 tons

Alkali Earth uses alkaline byproducts from industrial processes as carbon-removing gravel to apply to roads. These minerals act as a sink for atmospheric CO₂, storing it permanently while cementing road surfaces. The formation of CO₂-containing minerals within the gravel can be directly measured, leading to high-confidence in resulting removals.

Airhive

Direct air capture

London, UK

943 tons

Airhive is building a geochemical direct air capture system using a sorbent that can be made out of cheap and abundant minerals. This sorbent reacts rapidly with atmospheric CO₂ when mixed with air in Airhive’s fluidized bed reactor. Coupled with a regeneration process that’s powered by electricity to release the CO₂ for geologic storage, this provides a promising approach to low-cost DAC.