Case Studies

These case studies illustrate how Alcoa is acting upon its commitment to sustainable development throughout the world. We are pleased with this progress, but look forward to achieving even more.

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Australia - 2006

Residue Carbon Capture Delivers Double Environmental Benefit


Alcoa scientists in Australia have developed a process that locks up carbon dioxide by mixing it with bauxite residue, a waste from the alumina refining process.

The residue carbon capture process not only captures large amounts of a greenhouse gas, it also reduces the alkalinity of the residue and opens the way for it to be reused.

The project has set a new benchmark for the global alumina industry. The first carbon capture plant is now fully operational at Kwinana, and similar plants are planned for our other refineries in Australia and around the world.

The Kwinana residue carbon capture plant is locking up almost 70,000 tons of carbon dioxide a year, the equivalent of taking 17,500 cars off the road.