carbon-capture
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Cory Sanderson Is Trying to Make Carbon Removal Boring Enough to Scale
After years inside industrial gas systems, the Sustaera co-founder rebuilt direct air capture around a stubborn idea: climate hardware wins when the complicated parts disappear.
Sustaera Scrapped Years of Work to Build a Cheaper Carbon-Capture Machine
Direct air capture has a brutal math problem: too much machinery chasing too little CO2. The North Carolina startup’s answer was to kill its first product, shrink the team and redesign the machine around electricity, ceramics and a cost target the market might actually buy.
The Climate Fund Betting the Future Still Runs Through a Pipe
Energy Capital Ventures built a narrow venture thesis around an unfashionable premise: decarbonization will have to work with existing gas infrastructure, not merely wish it away. Now data centers, industrial demand and a portfolio of strange machines are putting that bet to work.
The Company That Pumps One of Every Nine Barrels on Earth
It struck oil at a well called Dammam No. 7 in 1938. Nearly a century later, Aramco still moves roughly one of every nine barrels the world burns - and is quietly betting billions that its next act runs on gas, chemicals and code.
Holcim
Holcim is trying to turn the oldest ingredients in construction into a newer kind of business - one that sells lower-carbon materials, recycles yesterday’s buildings and captures the emissions its kilns cannot yet avoid.
Tarun Batchu
Tarun Batchu is the co-founder and CEO of Vela Energy, a startup building AI execution agents for large-load energy projects - software that reads a project's real records and drafts the procurement, permitting, and engineering work needed to move interconnection queues faster, always stopping for a human to approve. He started chasing energy problems at 12 with a carbon-capture project that reached ExxonMobil, spent his teens in climate policy and community organizing, and studied EECS and business through UC Berkeley's M.E.T. program before raising a $1.3M pre-seed led by a16z Speedrun and Z Fellows.
280 Earth
280 Earth is a climate-tech company that removes carbon dioxide permanently from the ambient air using a modular Direct Air Capture (DAC) system spun out of Alphabet's X, The Moonshot Factory. Its continuous-flow process uses a proprietary sorbent, off-the-shelf industrial equipment and low-grade waste heat or clean electricity to pull CO2 - and fresh water - out of the atmosphere at low energy cost. Its first plant in The Dalles, Oregon began operating in May 2024 and is designed to scale from hundreds to more than 20,000 tons of CO2 removed per year. The company's name references 280 parts per million, the pre-industrial atmospheric CO2 concentration it aims to help restore.
AirMyne
AirMyne is a Berkeley, California climate-tech company building liquid-based direct air capture (DAC) systems that pull carbon dioxide out of the atmosphere at industrial scale. Founded in 2022 by chemical-industry veterans Sudip Mukhopadhyay and Mark Cyffka, the company designs a low-temperature, energy-flexible capture process - regenerating its solvent at roughly 100-130 C so it can run on waste heat, geothermal energy, or electricity rather than the high-temperature furnaces most DAC rivals require. Backed by Y Combinator and, more recently, a strategic investment from Japanese energy giant ENEOS, AirMyne is moving from kilogram-per-day prototypes toward a commercial pilot and demonstration plant.
Calcarea
Calcarea is a Caltech- and USC-born climate-tech company decarbonizing the shipping industry with onboard reactors that capture CO2 from ship exhaust and convert it into stable ocean bicarbonate. By speeding up the natural reaction between seawater and limestone - a process that normally takes over 10,000 years - down to about a minute, Calcarea aims to permanently and safely store roughly half of a cargo ship's emissions as slightly saltier seawater, at costs competitive with today's best carbon capture options.
Proteum Energy
Proteum Energy is a Phoenix-based cleantech company that turns wasted flare gas and residual hydrocarbons into clean hydrogen, renewable natural gas, and designer fuels. Using its patented modular Flare-to-Fuel platform and steam non-methane reforming (SnMR) technology, Proteum helps oil, gas, and ethanol producers cut emissions and profit from assets that would otherwise be burned off into the sky.
Solidec
Solidec is a Houston-based climate-tech company spun out of Rice University that builds modular electrolyzers to make essential chemicals - starting with ultra-pure hydrogen peroxide - on-site from just air, water, and electricity. Its porous solid-electrolyte reactor skips the centralized plants, hazardous trucking, and fossil-fuel feedstocks of conventional chemical production, cutting emissions by as much as 90%. Founded in 2023 by Ryan DuChanois, Yang Xia, and Rice professor Haotian Wang, the company raised an oversubscribed $2M pre-seed round and has been backed by Chevron Technology Ventures' Catalyst Program, the Activate Fellowship, and a NASA SBIR award.
Ben Hernandez
Ben Hernandez is the founder and CEO of Numat, a Chicago deep-tech company that treats chemistry like software. Numat designs metal-organic frameworks (MOFs), nanoscale materials that capture, hold, and even destroy specific molecules with atomic precision. Trained as an engineer with a law degree and an MBA, and a former private equity investor, Hernandez turned a Northwestern lab idea into the world's first industrial-scale MOF manufacturing campus, powering safer hazardous-gas storage for the semiconductor industry through its ION-X product and pushing toward industrial decarbonization.
Ryan DuChanois
Ryan DuChanois is the co-founder and CEO of Solidec, a Houston climate-tech startup that spun out of Rice University in 2024. Solidec builds modular reactors that pull molecules from air and water and, using only electricity, make industrial chemicals like hydrogen peroxide on-site - no centralized plants, no long supply chains, no carbon-heavy inputs. A Gates Cambridge Scholar with a Yale PhD and 20 peer-reviewed papers in membrane science, DuChanois traded the academic bench for the factory floor, aiming to abate over a gigaton of carbon emissions a year by reinventing how the world's chemicals are made.
Sudip Mukhopadhyay
Sudip Mukhopadhyay is the CEO and co-founder of AirMyne, a Berkeley-based climate-tech company building liquid-solvent Direct Air Capture (DAC) machines that pull carbon dioxide straight out of the sky. A chemist and engineer with more than two decades in industrial R&D, he co-invented the low-global-warming car refrigerant 1234yf during a 16-year run at Honeywell, where he rose from engineer to corporate fellow and director of innovation. He launched AirMyne in 2022 with co-founder Mark Cyffka through Y Combinator, raising $6.9M in seed funding and a strategic investment from Japanese energy giant ENEOS, with the bet that cheap low-temperature heat (including geothermal) can make carbon removal affordable at industrial scale.
Terry Kennon
Terry Kennon is a chemical engineer turned investment banker turned clean-energy builder who serves as Executive Vice President and Chief Technology Officer of Proteum Energy in Phoenix, Arizona. He took on the President role in March 2019 after roughly four years as CTO. With more than 30 years across chemical engineering, biofuels investment banking at J.P. Morgan, and renewable-energy entrepreneurship, Kennon now leads Proteum's patented technology that reforms renewable ethanol into low-cost, low-carbon hydrogen and 'designer fuels' - and turns wasted flare gas into usable product. He is a named inventor on the company's core patents and directs both its technology roadmap and its intellectual-property strategy.
Mote
Mote is a Los Angeles-based climate-tech company that turns woody waste biomass into clean biohydrogen while permanently sequestering the carbon. Using a biomass carbon removal and storage (BiCRS) process spun out of Lawrence Livermore National Laboratory, Mote pairs energy production with carbon removal: each utility-scale plant is designed to produce roughly 60 tons of carbon-negative hydrogen per day while removing on the order of 450,000 tons of CO2 a year. The company is developing its first commercial facility near Bakersfield in California's Kern County and a second project in Northern California with the Sacramento Municipal Utility District.
Remora
Remora is a Detroit-area climate-tech company that bolts carbon capture onto the things already burning fuel - semi-trucks and freight locomotives - instead of building giant plants to pull CO2 back out of the sky. Its zero-backpressure device threads exhaust through proprietary adsorbents, captures up to 90% of the CO2, reduces soot and NOx to Tier 4 levels, then liquefies the gas to be sold into a supply-constrained industrial CO2 market. Operators share the revenue, so cutting emissions becomes a line item that pays rather than one that costs.
Joshuah Stolaroff
Joshuah Stolaroff is the co-founder and CEO of Mote, a Los Angeles clean energy company turning woody waste into renewable hydrogen while permanently burying the carbon. A Carnegie Mellon-trained engineer who built one of the first working prototypes for pulling CO2 straight out of the air, he spent eleven years running the carbon capture program at Lawrence Livermore National Laboratory before co-authoring 'Getting to Neutral,' the report that launched the Biomass Carbon Removal and Storage (BiCRS) approach now at the heart of Mote. His aim is blunt: reduce and remove a billion tons of carbon by 2035.
Parker Meeks
Parker Meeks is the President and CEO of Utility Global, a Houston-based clean-energy company commercializing H2Gen, a system that makes low-cost clean hydrogen on-site from industrial waste gases without electrolysis. A Houston native and electrical engineer turned McKinsey partner, he previously led hydrogen fuel-cell maker Hyzon as CEO. At Utility he is steering the company from demonstration into global commercialization, including a first commercial-scale steel project with ArcelorMittal in Brazil.
Paul Gross
Paul Gross is the co-founder and co-CEO of Remora, a Detroit-area climate hardware company that bolts a carbon-capture device onto the tailpipes of semi-trucks and locomotives, grabbing the CO2 before it ever hits the sky and selling it as beverage-grade gas to breweries and greenhouses. He read a stranger's PhD dissertation on mobile carbon capture during his senior year at Yale, wrote the author a business plan, and convinced her to quit the EPA to build a company with him. Remora has raised roughly $117 million and signed pilots with Union Pacific, Norfolk Southern, Ryder, Werner, and Cargill.
CREW Carbon
CREW Carbon is a Yale-spinout water and climate technology company based in Hamden, Connecticut. It retrofits municipal and industrial wastewater treatment plants with a closed-system enhanced-weathering process: dosing alkaline minerals into wastewater to convert dissolved CO2 into stable bicarbonate. The approach lowers operating costs and improves treatment performance for utilities while permanently and measurably removing atmospheric carbon, which it sells to corporate buyers as durable carbon removal credits.
Mantel
Mantel is a Cambridge, Massachusetts cleantech company building a molten-salt approach to industrial carbon capture. Spun out of MIT in 2022, its molten borate materials operate inside the high-temperature guts of boilers, kilns and furnaces, absorbing more than 95% of CO2 while recovering high-grade heat that offsets the energy cost of capture. The pitch is blunt: cut the cost of capturing a ton of carbon by more than half and make it work in the dirtiest, hottest corners of heavy industry - cement, steel, pulp and paper, power and refining.
Cameron Halliday
Cameron Halliday is the co-founder and CEO of Mantel, a Cambridge, Massachusetts climate-tech company spun out of MIT's chemical engineering labs. Mantel uses molten borate salts to capture CO2 from heavy industry at high temperatures, recovering most of the energy as usable steam and slashing the cost and energy penalty of carbon capture. Halliday discovered the core material during his PhD at MIT, then co-founded the company in 2022 and raised a $30 million Series A co-led by Shell Ventures and Eni Next.
Heirloom Carbon
Heirloom Carbon Technologies is a San Francisco-based direct air capture company that uses limestone's natural CO2-absorbing properties to pull carbon dioxide permanently out of the atmosphere. Their process accelerates a geological phenomenon that normally takes thousands of years into a 3-day cycle: calcium oxide powder absorbs CO2 from ambient air, becomes limestone, gets heated in a renewable-energy-powered electric kiln to release the captured CO2, and repeats. The captured CO2 is then stored permanently underground or embedded in concrete. Founded in 2020, Heirloom opened America's first commercial DAC facility in Tracy, California in November 2023 and has raised over $354 million to expand capacity toward their goal of removing 1 billion tons of CO2 by 2035.
Nicholas Flanders
Nicholas Flanders is the Co-Founder and CEO of Twelve, a carbon transformation company that converts CO2, water, and renewable electricity into sustainable aviation fuel and carbon-neutral chemicals. A Stanford MBA and former McKinsey consultant, Flanders co-founded Twelve (originally Opus 12) in 2015 alongside scientists Dr. Etosha Cave and Dr. Kendra Kuhl to commercialize breakthrough electrochemical CO2 conversion technology developed at Stanford. The company has raised over $790 million, including a $645 million financing round in 2024 led by TPG Rise Climate, and is building AirPlant One - the world's first commercial-scale e-fuels facility - in Moses Lake, Washington.
Ethan Cohen-Cole
Ethan Cohen-Cole is the CEO and Co-Founder of Capture6, a Berkeley-based climate technology Public Benefit Corporation that has cracked one of cleantech's most stubborn puzzles: making carbon removal pay for itself. By integrating direct air capture with desalination brine management, Capture6 turns the costly waste stream of water treatment into a revenue engine - producing fresh water, green chemicals, and permanent CO2 sequestration simultaneously. Before pivoting to climate tech, Cohen-Cole spent 25+ years as a PhD economist, Federal Reserve bank regulator, and finance professor, giving him an unusually rigorous lens on the economics of decarbonization. Capture6 raised a $27.5M Series A in March 2025, backed by Hyundai's ZER01NE Ventures and Tetrad Corporation, bringing total funding to nearly $49M.
Kathleen Alexander
Kathleen Alexander is co-founder and CEO of Savor, a San Jose-based food-tech startup that makes butter, palm oil, and cocoa butter alternatives from carbon dioxide, hydrogen, and oxygen - no animals, no plants, no farmland. Backed by Bill Gates' Breakthrough Energy Ventures and Synthesis Capital with $33 million raised, Savor commercially launched its carbon-synthesized butter in March 2025 and was recognized in TIME's Best Inventions of 2025. Alexander holds a PhD in Materials Science & Engineering from MIT and is a 2013 Hertz Fellow who grew up in Corvallis, Oregon - famously starting college at 16, dropping out, attending community college, and ultimately earning her doctorate at MIT.