Freya Burton, Chief Sustainability Officer and Head of Europe at LanzaTech.
June 17, 2026

Episode 27: Freya Burton (LanzaTech) - Scaling Carbon Recycling Technology from Startup to Maturity, Through Earthshot and IPO

Logo of Adopter - the marketing agency for deep tech and climate adaptation.

Episode summary

Freya Burton, Chief Sustainability Officer and Head of Europe at LanzaTech, discusses carbon recycling, sustainable aviation fuel, and the 20-year journey from a four-person startup to a public company on Episode 27 of Scaling Green Tech, a podcast by Adopter.

Burton describes how LanzaTech captures waste carbon from industrial sites such as steel mills and uses microbes to ferment it into ethanol, a process she likens to brewing beer with carbon instead of sugar and bacteria instead of yeast. She traces the company from its 2005 founding in New Zealand by Dr Sean Simpson and Dr Richard Forster, through a 2008 pilot and a 2012 demonstration plant in China, to its first commercial plant in 2018 and six plants today. The conversation turns to why LanzaTech narrowed its focus to sustainable aviation fuel after listing on the Nasdaq, and how it reframes its work around energy security and economic value rather than emissions alone. Burton also explains why getting fuels policy right has taken more than a decade of work across the UK, EU and US.

This episode is relevant for founders scaling capital-intensive climate tech, carbon capture and utilisation investors, sustainable aviation fuel producers and buyers, and policymakers working on fuels regulation.

Guest profile

Freya Burton is the Chief Sustainability Officer and Head of Europe at LanzaTech. She joined the company in 2007 as one of its first four employees, working in borrowed lab space, and has since held roles spanning safety, human resources, external affairs and policy. She previously served as the company's Chief People Officer and spent a long period based in the United States before moving into her current sustainability and Europe-focused leadership role.

LanzaTech is a carbon recycling company that converts waste carbon from industrial emissions into ethanol and other chemicals using a gas fermentation process. Founded in New Zealand in 2005 and now listed on the Nasdaq, the company operates six commercial plants worldwide across steel mills, ferro alloy mills and a refinery. It supplies ethanol made from recycled carbon, and related materials, to consumer brands in fashion, fragrance and household goods.

Explore the LanzaTech website

Find Freya Burton on LinkedIn.

Key takeaways

  • LanzaTech captures waste carbon from industrial sites and ferments it into ethanol using microbes. Burton compares the process to brewing beer, but using carbon in gas instead of sugar and bacteria instead of yeast.
  • LanzaTech operates six commercial plants worldwide across steel mills, ferro alloy mills and a refinery, with commercial reactors producing approximately 64,000 tonnes of ethanol a year.
  • Since listing on the Nasdaq, LanzaTech has sharpened its focus onto sustainable aviation fuel and low-cost SAF, narrowing from a historically broad approach across road fuels, materials and packaging.
  • LanzaTech was a finalist for the Earthshot Prize and the only US company in its cohort, gaining press coverage that reached general consumer audiences rather than only investor and technical circles.
  • Burton's headline advice on funding tough tech is that it takes a long time, requires going global across geographies and investor types, and depends on patient partners. LanzaTech has raised rounds led from the US, Japan, Malaysia and China, alongside government grants.
  • Before pursuing a partnership, Burton advises founders to work out what the other party actually wants from the relationship, because companies in the same sector can have very different motivations, some purely financial and some environmental. Selling to an assumed motivation risks offering a partner something they do not need.
  • What investors prioritise shifts as a company matures: in LanzaTech's early years they wanted data proving the technology worked, then the focus moved to vision, and today it centres on economics, the business plan and execution. Burton frames this as a timeline shift more than a geographic one.
  • Proof points, not pitches, unlocked LanzaTech's partnerships. The company generated thousands of hours of operating data across a pilot and four demonstration plants before major steel companies committed, because with genuinely new technology "everyone wants to be first to be second."
  • Burton argues climate technologies scale faster when they lead with the value drivers customers care about, such as cost, energy security and supply chain resilience, rather than emissions reduction, with sustainability following as a by-product of adoption.

topics covered

  • Explaining complex deep tech simply
  • How carbon recycling works: the brewery analogy and the microbes
  • Reaching commercial scale with a first-of-a-kind technology
  • A non-linear founder journey: finding problems and solving them
  • Building company culture and the risk of leader burnout
  • How commercial strategy shifts from startup to public company
  • Narrowing focus to win a single market
  • Leading with value and energy security, not sustainability alone
  • Building partnerships on data and proof points
  • What investors prioritise at different stages of growth
  • Funding capital-intensive tough tech, and marketing it to mainstream audiences
  • Navigating regulatory uncertainty and advice for the next stage of scaling

Frequently asked questions

What does LanzaTech do?
What is sustainable aviation fuel (SAF)?
How does the UK regulate sustainable aviation fuel?
Why do climate technologies often struggle to scale?
How is carbon-captured ethanol used in fashion and fragrance?

About Scaling Green-Tech

Scaling Green-Tech by Adopter is a podcast for people shaping the future of climate technology - founders, investors, and ecosystem leaders at the forefront of adaptation and resilience solutions. As part of Adopter’s mission to accelerate the adoption of high-impact climate innovation, the podcast aims to amplify real voices and practical insights that can help others navigate the startup journey. These conversations go beyond the hype to bring real, unfiltered stories - the wins, the roadblocks and everything you need to know in between.

Read the full transcript here
illustration of Earth