Green Hydrogen from Seawater: Equatic Makes by Extracting CO2 - India Renewable Energy Consulting – Solar, Biomass, Wind, Cleantech
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Green Hydrogen from Seawater: Equatic Makes by Extracting CO2

Here’s an article posted in Market Screener.

According to the article,

  • US-based Equatic plans to extract CO2 from seawater and produce green hydrogen
  • The company uses a technique that extracts stored CO2 from the water, releasing green hydrogen
  • Ocean water contains 150 times more CO2 than the air, making it more effective to remove CO2 from seawater

Equatic’s process of extracting CO2 from seawater and producing green hydrogen through electrolysis is a groundbreaking innovation with significant potential for combating climate change. Here’s a detailed explanation of the process along with specific data points:

  1. Seawater Intake: The process begins with the intake of seawater, which is rich in dissolved CO2. Seawater contains approximately 150 times more CO2 than the air, making it a highly effective source for CO2 extraction.
  2. Electrolysis: The seawater is then directed into a tank where an electrolyzer splits the water into hydrogen gas (H2) and oxygen gas (O2) through electrolysis. This process requires electricity, but Equatic utilizes renewable sources to minimize environmental impact.
  3. CO2 Capture: As the electrolysis takes place, the dissolved CO2 in the seawater is released. Equatic’s innovative method involves mineralizing the CO2, essentially turning it into rock. This captured CO2 is then stored underground in empty gas and oil fields or salt formations, preventing it from re-entering the atmosphere.
  4. Green Hydrogen Production: Simultaneously, the hydrogen gas generated during electrolysis is captured. This hydrogen serves as a clean and renewable energy source, known as green hydrogen. It can be used in various applications, such as fuel for transportation, including aviation.
  5. Alkaline Rock Addition: To maintain the natural composition of the seawater and balance its acidity, Equatic adds alkaline rock to the remaining water. This ensures that the discharged water returned to the ocean is as clean as when it was initially extracted, with reduced CO2 levels.
  6. Pilot Testing and Scaling Up: Equatic conducted a successful pilot test in Los Angeles, where it extracted 100 kilograms of CO2 per day from the ocean, yielding a few kilograms of green hydrogen. The company plans to scale up its operations with a larger test plant scheduled to open in Singapore, aiming to capture 3,500 tons of CO2 annually. By 2030, Equatic envisions large-scale plants capable of removing 1 million tons of CO2 per year and producing 35,000 tons of green hydrogen.
  7. Partnership with Boeing: Equatic has entered into a five-year agreement with aviation company Boeing to supply them with green hydrogen fuel. Under this agreement, Equatic will capture 63,000 tons of CO2 for Boeing, further demonstrating the commercial viability and demand for their innovative solution.

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Here's more about EAI

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We work across entire climate tech spectrum

Our specialty focus areas include bio-energy, e-mobility, solar & green hydrogen

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Hydrogen Production from Seawater: New System by Researchers: Innovative system converts seawater into hydrogen fuel, providing a sustainable energy source and enhancing understanding of seawater ion movement. Double-Membrane Electrolysis: A New Method for Producing Hydrogen Directly from Seawater – A new method called double-membrane electrolysis enables the extraction of hydrogen directly from seawater, operating without creating toxic by-products like bleach and chlorine.

About Narasimhan Santhanam (Narsi)

Narsi, a Director at EAI, Co-founded one of India's first climate tech consulting firm in 2008.

Since then, he has assisted over 250 Indian and International firms, across many climate tech domain Solar, Bio-energy, Green hydrogen, E-Mobility, Green Chemicals.

Narsi works closely with senior and top management corporates and helps then devise strategy and go-to-market plans to benefit from the fast growing Indian Climate tech market.


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