The Department of Energy is advancing its first-of-a-kind program to stimulate demand for carbon removal by becoming a major buyer. On Tuesday, the agency awarded $50,000 to each of 24 semifinalist companies competing to suck carbon dioxide out of the atmosphere on behalf of the U.S. government. It will eventually spend $30 million to buy carbon removal credits from up to 10 winners.
The nascent carbon removal industry is desperate for customers. At a conference held in New York City last week called Carbon Unbound, startup CEOs brainstormed how to convince more companies to buy carbon removal as part of their sustainability strategies. On the sidelines, attendees lamented to me that there were hardly even any potential buyers at the conference — what a missed opportunity.
Conference panelists asserted that the industry needed to rebuild trust. Purchasing carbon credits has become a risky strategy for companies. In one investigation after another, journalists and researchers have shown that many of the projects behind these credits fail to produce the climate benefits they advertise. There’s a class action lawsuit against Delta Air Lines for marketing itself as “carbon neutral” after purchasing such questionable carbon offsets.
Carbon removal credits are technically different from the offsets that companies bought in the past, which were based on projects that reduce emissions to the atmosphere rather than remove carbon that’s already heating the planet. But there’s still a risk of sham projects. And because the field is relatively new, there’s not yet a set of widely agreed-upon standards to measure and verify how much carbon is being removed.
The Department of Energy hopes that by selecting 24 companies that have been vetted by government scientists, it’s sending a signal to the private sector that there are at least some projects that are legitimate. “We can’t wait to invest in CDR until those standards have been codified,” Noah Deich, the agency’s deputy assistant secretary of carbon management, told me. “We need to invest now so that we actually get the data that we can use to inform the standards, and then over time codify those standards and strengthen and improve them.”
The semifinalists represent a wide range of carbon removal methods. Nine of the companies are building machines that capture carbon dioxide directly from the air. Seven take advantage of the natural ability of plants and algae to suck up carbon, and have developed systems to sequester that carbon for far longer than would otherwise occur. Five employ rocks that naturally absorb carbon and have figured out how to speed up the process. The last three capture carbon from the ocean, enabling the world’s biggest carbon sink to draw down more from the atmosphere.
To proceed to the final round, all of these companies will have to draw up contracts that say how quickly they will be able to remove the promised tons of carbon, and who they will work with to measure and verify the process.
The Biden administration is spending billions on research, development, and deployment of carbon removal. Some of the semifinalists, like Climeworks, Heirloom Carbon, and 1PointFive, were already selected for grants from the DOE to build the U.S.’s first “direct air capture hubs” — projects capable of removing one million tons of carbon from the air per year. But those hubs will fail if the companies don’t ultimately find buyers for their carbon removal. “Every single CDR project that we’re seeing today requires some sort of voluntary credit sale to be profitable,” said Deich.
The Department of Energy’s $30 million budget to buy carbon removal is relatively small. The semifinalists said they could deliver a wide range of credits with their share of the funds, from 3,000 over a three-year period, to more than 30,000. In any case, DOE is unlikely to afford much more than 100,000 tons of carbon taken out of the atmosphere, equivalent to about 0.002% of the CO2 the United States emitted in 2022. When distributed among 10 companies, it’s certainly not enough to finance a project. But Deich told me he sees this contest as a public-private partnership. The agency is challenging the semifinalists to leverage the DOE’s recognition to try and sell as many credits as they can. It’s one of the criteria they’ll be judged on for the final phase of the contest.
Several semifinalists I spoke with were optimistic the DOE’s backing would help. “One of the things that the private sector is wrestling with is the technical underwriting of various carbon dioxide removal technologies,” Barclay Rogers, the CEO of the carbon removal company Graphyte, told me. Graphyte’s process almost sounds too simple to work. The company takes discarded plant matter from forests and fields, dries it out so that it doesn’t decompose, compresses it into bricks, and then buries them. Graphyte has already built a small processing facility in Arkansas and secured a burial site that could store an estimated 1.5 million tons of CO2. Rogers was excited to have DOE’s backing as “a broad signal to the market of the viability of Graphyte’s carbon casting process.”
Others were grateful that the government was branching out to new technologies. To date, most of the DOE’s carbon removal programs have supported direct air capture. Companies working on other approaches have been shut out of funding opportunities, and some worry that this has contributed to a perception among buyers that direct air capture is the only valid method. “We think this is a huge step forward, since it’s really the first time not only that the U.S. government is going to become a purchaser of carbon removal, but also funding a full range of carbon removal solutions,” Nora Cohen Brown, head of market development and policy at Charm Industrial, told me. (Charm also buries plant waste underground, but in the form of oil.) “We really think that biomass CDR has immense potential,” she said. “It’s a big deal to have DOE’s blessing for that pathway.”
Edward Sanders, the chief operating officer of a startup called Equatic, told me that being a semifinalist meant the company would be able to build a plant in the U.S. much sooner than it initially planned. Equatic has developed technology to remove carbon from seawater, enabling the ocean to take up more carbon. It’s currently building its first large-scale plant in Singapore. “This tells prospective future buyers that there is a role to play in the near term in the U.S. for a marine-based pathway.”
Many of the companies on the list, including the three I just mentioned, have already been relatively successful in selling credits. Graphyte sold 10,000 to American Airlines. Equatic has a 62,000 deal with Boeing. Charm will remove more than 100,000 tons for Frontier Climate, a group of buyers that includes Stripe, Alphabet, Shopify, and Meta. But even though a handful of tech companies and airlines are buying carbon removal, these sweeping gestures are not enough to sustain the industry, let alone grow it to the scale that scientists say will be necessary to halt climate change.
DOE’s purchase may help increase confidence in some of these companies and approaches, but it may not do much to solve another problem: There’s little incentive for anyone to pay for carbon removal today, and it’s much more expensive than other options companies have to reduce their emissions. Credits can cost between several hundred to more than a thousand dollars each.
Deich said the agency was trying to set an example for other buyers. Instead of creating a net-zero target and searching for the cheapest credits to accomplish its goal, it’s prioritizing quality and only buying what it can afford. “We need to pay what it costs,” he said, “and then developers can develop projects and figure out how to do it cheaper so that over time, it starts to come down the cost curve significantly, and we can buy larger and larger quantities.”
But this is only the near term plan to help the industry mature. Ultimately, Deich doesn’t think that the voluntary trade of credits will be enough to support the levels of carbon removal that will make a difference in climate change. He sees this purchase prize program as a way to start building the government’s capacity to play a larger role. “There’s going to need to be some sort of mandate or public procurement that happens for the field to really scale beyond 2030,” he said.
The full list of semifinalists:
Avnos, Inc. — direct air capture — 3,000 credits
Carbon America — direct Air Capture — 3,400 credits
CarbonCapture, Inc. — direct air capture — 3,333 credits
Climeworks — direct air capture — 3,500 credits
Global Thermostat and Fervo Energy — direct air capture — 3,500 credits
Heirloom — direct air capture — 3,030 credits
1PointFive — direct air capture — 3,861 credits
280 Earth — direct air capture — 3,000 credits
8 Rivers — direct air capture — 7,200 credits
Arbor Energy — biomass with carbon removal and storage — 8,000 credits
Carbon Lockdown — biomass with carbon removal and storage — 17,143 credits
Charm Industrial — biomass with carbon removal and storage — 5,000 credits
Clean Energy Systems — biomass with carbon removal and storage — 11,320 credits
Climate Robotics — biochar — 30,252 credits
Graphyte — biomass with carbon removal and storage — 30,000 credits
Vaulted Deep — biomass with carbon removal and storage — 10,320 credits
Alkali Earth — enhanced rock weathering and mineralization — 8,108 credits
CREW Carbon — enhanced rock weathering and mineralization — 7,500 credits
Eion — enhanced rock weathering and mineralization — 9,900 credits
Lithos Carbon — enhanced rock weathering and mineralization — 8,109 credits
Mati Carbon — enhanced rock weathering and mineralization — 4,561 credits
Ebb Carbon — marine-based carbon removal — 3,000 credits
Equatic — marine-based carbon removal — 6,521 credits
Vycarb Inc. — marine-based carbon removal — 3,000 credits
The conference logo on a building. Wagner Meier/Getty Images