The project will retrofit CS Energy’s Callide A Power station in Queensland with oxyfuel carbon capture technology which, once applied, creates a highly concentrated stream of CO₂ by burning coal with oxygen (rather than air, which is approximately 78% nitrogen) and re-circulated waste gases.

The concentrated stream of CO₂ can then be captured, purified, compressed to liquid form, and stored underground.
 

How is it stored?

The captured liquid CO₂ will be stored deep underground in geological formations - a process known as geosequestration.

Suitable sites for geosequestration are sedimentary basins that have permeable (porous) rock that can absorb CO₂, with a natural upper seal of non-permeable (solid) cap-rock to trap the CO₂ in place.

Depleted gas fields are an example of sites with high CO₂ storage potential, as they have the characteristics that have enabled natural gases to be stored there previously for millions of years.

The Global Carbon Capture and Storage Institute recently announced in-principle support of $1.83 million to faciltate an injection test of CO₂ from the project in the Northern Denison Trough and other locations in south-east Queensland.