Industry requires decarbonisation technology that is not only robust, but able to operate at speed. RMIT researchers have made strides in the development of such technology.
Researchers have developed a smart and super-efficient new way of capturing carbon dioxide and converting it to solid carbon, to help advance the decarbonisation of heavy industries.
The carbon dioxide utilisation technology from RMIT researchers is designed to be smoothly integrated into existing industrial processes.
Decarbonisation is an immense technical challenge for heavy industries like cement and steel, which are not only energy-intensive but also directly emit CO2 as part of the production process.
The new technology offers a pathway for instantly converting carbon dioxide as it is produced and locking it permanently in a solid state, keeping CO2 out of the atmosphere.
The research is published in the journal Energy & Environmental Science.
Co-lead researcher Associate Professor Torben Daeneke said the work built on an earlier experimental approach that used liquid metals as a catalyst.
“Our new method still harnesses the power of liquid metals but the design has been modified for smoother integration into standard industrial processes,” Daeneke said.
“As well as being simpler to scale up, the new tech is radically more efficient and can break down CO2 to carbon in an instant.
“We hope this could be a significant new tool in the push towards decarbonisation, to help industries and governments deliver on their climate commitments and bring us radically closer to net zero.”
A provisional patent application has been filed for the technology and researchers have recently signed a $AUD2.6 million agreement with Australian environmental technology company ABR, who are commercialising technologies to decarbonise the cement and steel manufacturing industries.
Scientist holding a tube of liquid metalLiquid metal is at the heart of the new carbon dioxide utilisation technology.
Co-lead researcher Dr Ken Chiang said the team was keen to hear from other companies to understand the challenges in difficult-to-decarbonise industries and identify other potential applications of the technology.
“To accelerate the sustainable industrial revolution and the zero carbon economy, we need smart technical solutions and effective research-industry collaborations,” Chiang said.
The steel and cement industries are each responsible for about 7% of total global CO2 emissions (International Energy Agency), with both sectors expected to continue growing over coming decades as demand is fuelled by population growth and urbanisation.
Technologies for carbon capture and storage (CCS) have largely focused on compressing the gas into a liquid and injecting it underground, but this comes with significant engineering challenges and environmental concerns. CCS has also drawn criticism for being too expensive and energy-intensive for widespread use.
Daeneke, an Australian Research Council DECRA Fellow, said the new approach offered a sustainable alternative, with the aim of both preventing CO2 emissions and delivering value-added reutilisation of carbon.
“Turning CO2 into a solid avoids potential issues of leakage and locks it away securely and indefinitely,” he said.
“And because our process does not use very high temperatures, it would be feasible to power the reaction with renewable energy.”
The Australian Government has highlighted CCS as a priority technology for investment in its net zero plan, announcing a $1 billion fund for the development of new low emissions technologies.