As researchers around the world race against time to develop new strategies and technologies to fight climate change, a team of scientists is exploring one possible way to directly reduce the amount of carbon dioxide in the environment: Negative emissions technologies (NETs).
As researchers around the world race against time to develop new strategies and technologies to fight climate change, a team of scientists at the University of Houston is exploring one possible way to directly reduce the amount of carbon dioxide in the environment: Negative emissions technologies .
Earth's carbon dioxide is stored in the atmosphere and the terrestrial biosphere, but the vast majority is found in our oceans. According to World Ocean Review, the planet's five oceans contain 38,000 gigatons of CO2. Furthermore, United Nations climate experts say oceans absorb 25% of all carbon dioxide emissions and capture 90% of the excess heat generated by those emissions, making it a vital buffer against climate change.
Current efforts to remove carbon dioxide from the ocean mainly involve complex processes like electrolysis, which attempt to either turn dissolved inorganic carbon into gas or convert it into magnesium or calcium carbonates. However, these techniques are energy-intensive and costly due to the use of rare and expensive materials, such as platinum and specialized membranes that easily clog, degrading their performance.
"While membrane-based systems showed promise, they come with challenges," said Prince Aleta, a doctoral student in Rahimi's lab."We're using electricity instead of thermal-based methods, and our current trajectory emphasizes systems without membranes for heightened efficiency."
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