3D visualisation of CCS at Sleipner, where carbon dioxide has been successfully stored deep below the North Sea outside the coast of Norway since 1996. Credit: Chalmers University of Technology | Equinor.
There is a need for a major boost in carbon capture and storage (CCS) technology if the Paris Climate Agreement is to be fulfilled.
The statement stems from a new study, led by Chalmers University of Technology in Sweden and Norway’s University of Bergen, which shows that without major efforts, CCS technology will not expand fast enough to meet the 2°C target and even with major efforts it is unlikely to expand fast enough for the 1.5°C target.
The idea behind CCS technology is to capture carbon dioxide then store it deep underground.
Some applications of CCS, such as bioenergy with CCS (BECCS) and direct air capture and storage (DACCS) actually lead to negative emissions, essentially ‘reversing’ emissions from burning fossil fuels.
CCS technologies play an important role in many climate mitigation strategies including net-zero targets. However, the current use is negligible.
Jessica Jewell, associate professor at Chalmers, said: “CCS is an important technology for achieving negative emissions and also essential for reducing carbon emissions from some of the most carbon-intensive industries.
“Yet our results show that major efforts are needed to bridge the gap between the demonstration projects in place today and the massive deployment we need to mitigate climate change.”
Analysis
A new study, Feasible Deployment of Carbon Capture and Storage and the Requirements of Climate Targets, conducted a thorough analysis of past and future growth of CCS to forecast whether it can expand fast enough for the Paris Climate Agreement.
The study found that over the 21st Century, no more than 600 Gigatons (Gt) of carbon dioxide can be sequestered with CCS.
First author of the study, Tsimafei Kazlou, a PhD candidate at University of Bergen, said: “Our analysis shows that we are unlikely to capture and store more than 600 Gt over the 21st Century.
“This contrasts with many climate mitigation pathways from the Intergovernmental Panel on Climate Change (IPCC) which in some cases require upwards of 1,000 Gt of CO2 captured and stored by the end of the century.
“While this looks at the overall amount, it’s also important to understand when the technology can start operating at a large scale because the later we start using CCS the lower the chances are of keeping temperature rise at 1.5°C or 2°C.
“This is why most of our research focused on how fast CCS can expand.”
Cut failure rates
The study highlights the need to expand the number of CCS projects that realise this technology and cut failure rates to ensure the technology ‘takes off’ this decade.
Today, the development of CCS is driven by policies like the EU Net-Zero Industry Act and the Inflation Reduction Act in the US. In fact, if all of today’s plans are realised, by 2030, CCS capacity would be eight times what it is today.
Kazlou said: “Even though there are ambitious plans for CCS, there are big doubts about whether these are feasible.
“About 15 years ago, during another wave of interest in CCS, planned projects failed at a rate of almost 90%.
“If historic failure rates continue, capacity in 2030 will be at most twice what it is today which would be insufficient for climate targets.”
Promising technology
Like most technologies, CCS grows non-linearly and there are examples of other technologies to learn from. Even if CCS takes-off by 2030, the challenges won’t stop.
In the following decade it would need to grow as fast as wind power did in the early 2000s to keep up with carbon dioxide reductions required for limiting the global temperature rise to 2°C by 2100.
Then starting in the 2040s, CCS will need to match the peak growth that nuclear energy experienced in the 1970s and 1980s.
Jewell said: “The good news is that if CCS can grow as fast as other low-carbon technologies have, the 2°C target would be within reach (on tiptoes). The bad news, 1.5°C would likely still be out of reach.”
The authors say their analysis underlines the need for strong policy support for CCS combined with a rapid expansion of other decarbonisation technologies for climate targets.
Aleh Cherp, professor at Central European University in Austria, said: “Rapid deployment of CCS needs strong support schemes to make CCS projects financially viable.
“At the same time, our results show that since we can only count on CCS to deliver 600 Gt of CO2 captured and stored over the 21st Century, other low-carbon technologies like solar and wind power need to expand even faster.”
