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Australian Climate Tech Startup Develops Ocean-Based Carbon Capture Technology

Sydney-based OceanCO2 secures $25M to deploy ocean-based carbon removal technology that could sequester millions of tons annually.

James Mitchell
By James Mitchell · BRIC.TV
Published Apr 8, 2026 · 4 min read · 1365 views
Australian Climate Tech Startup Develops Ocean-Based Carbon Capture Technology

Key Takeaways

  • OceanCO2 raises $25M for ocean-based carbon capture
  • Technology costs 70% less than direct air capture
  • Pilot projects successfully removed 10,000 tons of CO2
  • Reduces ocean acidification while capturing carbon

OceanCO2, a Sydney-based climate tech startup, has successfully demonstrated a breakthrough ocean-based carbon capture method and secured $25 million in funding to scale operations. The technology enhances the ocean's natural ability to absorb CO2 through controlled alkalinity enhancement.

Scientific Approach

The company disperses carefully measured alkaline materials in specific ocean locations, increasing the water's capacity to absorb atmospheric CO2. This process mimics and accelerates natural weathering processes that have regulated Earth's climate for millions of years.

Technology Advantages

  • Captures and permanently stores CO2 for 10,000+ years
  • Costs 70% less than direct air capture technologies
  • Improves ocean health by reducing acidification
  • Scalable to gigatonne-level carbon removal

Pilot Results

Initial pilot projects off Australia's coast have successfully removed 10,000 tons of CO2 while showing positive effects on marine ecosystems. The company has signed agreements with major corporations seeking high-quality carbon removal credits.

"We're not just tackling climate change; we're restoring ocean health in the process," said Dr. Emily Carter, founder and Chief Scientist. "This is a true climate solution with multiple environmental benefits."

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