The Callide Oxyfuel Project is a world first project which has successfully demonstrated how oxyfuel combustion and carbon capture technology can be applied to a coal-fired power station to generate electricity with low emissions.

Oxyfuel involves firing a conventional pulverised fuel coal boiler with oxygen and recycled exhaust gases instead of regular air. This produces a concentrated stream of carbon dioxide that can be “captured” by compression in a CO2 Processing Unit (CPU) and safely stored, indefinitely, deep underground.

Oxyfuel combustion produces approximately 75% less flue gas than air‑fuelled combustion, and produces exhaust that consists primarily of CO2 and water.

Unlike the other developing coal-based low COemissions technologies, Australian application of Oxyfuel does not have any inherent gas cleaning technologies built into the process. While additional existing controls are available, they add considerable expense and some complexity to a retrofit.

The demonstration phase of the Callide Oxyfuel Project ran from 2012 until 2015 and completed 10,200 hours of operation in oxy-firing mode. ANLEC R&D supported a number of fundamental and applied research and development activities during the project’s operational phase. This work provided valuable technical learnings that will inform future designs and commercial applications of this technology.

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