New study shows carbon dioxide storage is secure climate mitigation tool

June 13, 2018, University of Aberdeen
Capturing emissions and ensuring that carbon dioxide can be safely trapped underground is crucial for the successful protection of the atmosphere. Credit: University of Aberdeen

New research shows that captured carbon dioxide can be stored safely for thousands of years by injecting the liquefied gas deep underground into the microscopic pore spaces of common rocks.

The findings – published in Nature Communications today – increase confidence in the widespread roll-out of engineered capture and storage.

In the study, researchers from Scottish Carbon Capture & Storage (SCCS), whose partner institutes include the Universities of Aberdeen and Edinburgh, compiled a worldwide database of information from natural carbon dioxide and methane accumulations and hydrocarbon industry experience – including engineered gas storage, decades of borehole injection, and laboratory experiments.

Computer simulations were used to combine all these factors and model storage of carbon dioxide for 10,000 years into the future. Previous research in this area had not fully accounted for the natural trapping of carbon dioxide in rock as microscopic bubbles, or the dissolving of carbon dioxide into the salty water already in the rocks.

The UN Paris agreement has committed the world to limiting climate warming to well below 2°C from pre-industrial levels. This requires huge reductions in the amount of the greenhouse gas, carbon dioxide, which is released to the atmosphere from industry, electricity generation, heating and transport.

Capturing these emissions and ensuring that carbon dioxide can be safely trapped underground is crucial for the successful protection of the atmosphere.

Dr. Juan Alcalde, who co-led the research at the University of Aberdeen said: "The security of carbon dioxide storage is an understandable concern for people, communities and governments. Our work shows that the of carbon dioxide necessary to help address climate change can be secure for many thousands of years."

Dr. Stephanie Flude who co-led the work at the University of Edinburgh said: "We selected the model inputs to be conservative but realistic. Importantly, our computer simulations, based on good-regulation practices, such as those used currently in the North Sea, retained more than 90 percent of the injected after 10,000 years in 95 percent of the cases. The most probable outcome being at least 98 percent retention."

Explore further: Heat-trapping carbon dioxide levels in air hit another high

More information: Juan Alcalde et al. Estimating geological CO2 storage security to deliver on climate mitigation, Nature Communications (2018). DOI: 10.1038/s41467-018-04423-1

Related Stories

Carbon capture has a sparkling future

April 1, 2009

( -- New research shows that for millions of years carbon dioxide has been stored safely and naturally in underground water in gas fields saturated with the greenhouse gas. The findings - published in Nature today ...

Video: Developing carbon management solutions

July 20, 2017

Global consumption of fossil fuels is causing atmospheric carbon dioxide and other greenhouse gases to rise to levels that threaten human and environmental sustainability. These gases warm the planet and negatively impact ...

Recommended for you

Death near the shoreline, not life on land

December 13, 2018

Our understanding of when the very first animals started living on land is helped by identifying trace fossils—the tracks and trails left by ancient animals—in sedimentary rocks that were deposited on the continents.

The long dry: global water supplies are shrinking

December 13, 2018

A global study has found a paradox: our water supplies are shrinking at the same time as climate change is generating more intense rain. And the culprit is the drying of soils, say researchers, pointing to a world where drought-like ...

New climate model to be built from the ground up

December 13, 2018

Facing the certainty of a changing climate coupled with the uncertainty that remains in predictions of how it will change, scientists and engineers from across the country are teaming up to build a new type of climate model ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.