Cost of capturing carbon dioxide from power stations could be reduced by a quarter, an Australian study shows.
Carbon capture and storage (CCS) has the potential to make deep cuts in global carbon dioxide (CO2) emissions, a major contributor to climate change, by capturing and storing carbon dioxide emissions from major sources such as power stations.
But the problem is the high cost of the technology, partly due to the amount of extra energy needed, known as the energy penalty, when adding carbon capture to existing power stations.
"Currently about 80 per cent of the cost of CCS systems is in capturing the CO2," said Barry Hooper, Chief Technologist with the Co-operative Research Centre for Greenhouse Gas Technologies (CO2CRC).
"Reducing capture cost is therefore the most effective way to make significant savings to the overall cost. Process integration is one of several pathways our research teams are pursuing to drive down capture costs."
The CO2CRC team, which included researchers from Monash University, used process integration studies to identify minimum energy targets. They considered the heat and cooling requirements of the power plant and capture plant holistically, rather than individually, and found that initial energy penalty estimates could be significantly reduced.
This is the first such comprehensive study in the CCS area and the technique is applicable to both retrofitted and new carbon capture plants. While there is still engineering work to be done on capital and operating implications of this research, it offers an encouraging finding to generators as they consider options to reduce their carbon dioxide emissions.
The findings were discussed with Victorian Government and power industry representatives at a recent CO2CRC research showcase in Melbourne. The showcase provided an update on the latest developments in CO2CRC carbon capture and storage (CCS) research and demonstration projects, and issues surrounding large scale CCS projects in Victoria.