The airline industry's challenge to decarbonize is highlighted by United Airlines Ventures' investment in Heirloom, a company that captures CO2 using limestone. The process, involving stacking limestone powder and heating it to release CO2, enables the gas to be either sequestered or used as sustainable aviation fuel. This method is appealing due to its simplicity and reliability. Major companies like Microsoft leverage this technology for carbon offsetting, demonstrating potential partnerships and scalability. Additionally, capturing CO2 for fuel could sidestep land-use concerns associated with conventional biofuels, presenting a promising avenue for the industry.
The technology relies on limestone's natural ability to absorb CO2, with proven methods of heat application allowing for effective carbon capture and release.
United Airlines can now either sequester captured CO2 for credits or convert it into sustainable aviation fuel, thereby diversifying its approach to emissions reduction.
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