American Airlines To Turn 10K Tons of CO2 Into Buried Carbon Blocks

American Airlines today announced a deal with Graphyte to purchase “carbon removal credits” to help accelerate its long-term goal to reach net-zero emissions by 2050. According to the announcement, the airline will purchase credits equivalent to 10,000 tons of permanent carbon removal with delivery scheduled for early 2025. Graphyte uses a process called carbon casting that converts byproducts from the agriculture and timber industries such as wood bark, rice hulls and plant stalks which have captured carbon dioxide through photosynthesis. The plant material is dried to prevent decomposition and then converted into carbon dense bricks that are sealed with a polymer barrier. These bricks are stored in underground chambers and monitored with sensors to make sure the carbon does not escape, according to the company.

Plant byproducts from the agriculture and timber industries are typically burned or left to decompose, which returns carbon dioxide into the atmosphere. This biomass material is equivalent to 3 billion tons of potential carbon dioxide removal annually, according to Graphyte. Graphyte says carbon casting is a cheap, scalable alternative to expensive and technologically intensive methods of carbon capture and removal. The company is backed by Breakthrough Energy Ventures, an investment firm founded by Bill Gates that funds clean energy technologies.