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America Has A Steel Start-Up. Yes, Really - EP 47 Laureen Meroueh

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Dec 3, 2025
Laureen Meroueh, founder and CEO of Hertha Metals, is a mechanical engineer and MIT PhD who is transforming steel production. She discusses her groundbreaking one-step, gas-based steelmaking process that utilizes natural gas and hydrogen, aiming for cheaper and cleaner steel. Laureen highlights the advantages of US natural gas and the scalability of her technology, emphasizing its potential to reshape the US steel industry and support national security. Plus, she shares insights on funding challenges and the significance of domestic high-purity iron for defense supply chains.
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INSIGHT

Single-Step Gas+Arc Steelmaking

  • Hertha Metals replaces coal with gases and electric arcs to both reduce ore and control carbon in one step.
  • Laureen Meroueh says this single-step approach increases flexibility, cuts cost, and lowers emissions simultaneously.
INSIGHT

Electric Arcs And Gas Replace Coke

  • The process harnesses electric arcs for heat and gases (natural gas or hydrogen) as reductants instead of coke.
  • Meroueh emphasizes US natural gas price advantages that make the approach economically compelling.
ANECDOTE

Rapid Pilot Build To One Ton Per Day

  • Meroueh designed the pilot and reached a continuous one-ton-per-day pilot within about a year of opening HQ.
  • She credits Breakthrough Energy Fellows and early investors for enabling rapid build and testing.
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