Australia could benefit from a global shift to emissions-free steel
John Pye, Associate Professor, School of Engineering, ANU, Australian National University;Alireza Rahbari, Research fellow, School of Engineering, ANU, Australian National University; Emma Aisbett, Fellow, Australian National University;Frank Jotzo, Professor, Crawford School of Public Policy and Head of Energy, Institute for Climate Energy and Disaster Solutions, Australian National University; and Zsuzsanna Csereklyei, Senior Lecturer in Economics, RMIT University. Australia is the world’s number one exporter of both iron ore and metallurgical coal, the key ingredients of traditional steel making. Together, these materials make up a very large part of Australia’s export income. But as the world moves towards net-zero emissions by 2050, the conventional way of making steel, using coal to power a blast furnace, will come under question. Iron and steel production, in total, account for close to 7% of the world’s greenhouse gas emissions. This is incompatible with a net-zero world economy, where residual emissions would need to be compensated through carbon dioxide uptake from the atmosphere. The mature technology of coal-fired blast furnaces currently dominates the steel industry, generating 90% of its emissions. For years, decarbonising steel production has been seen as particularly challenging. But now, alternatives to the centuries-old practice of using coal to produce iron and steel are emerging. Researchers have been working on a number of new pathways to make steel with little or no emissions. The most promising process relying on the use of hydrogen. Our new research shows the steel industry can develop and implement green steel production processes to contribute to the great decarbonisation effort needed. For Australia, this presents an enormous new opportunity to future-proof and expand our steel industry as the world acts on climate change. How can we produce green steel? To eliminate emissions from this sector, several things are needed. First, we must use steel efficiently in well-designed structures. Second, we must […]