News
16 Mar 2022, 14:35
Edgar Meza

Mineralising CO2 can reduce cement production emissions by a third - study

Clean Energy Wire

Cement production is responsible for about seven percent of global greenhouse gas emissions, but a process known as CO2 mineralisation can cut the output of the greenhouse gas by up to a third at no additional cost, according to a study by the Institute for Advanced Sustainability Studies (IASS) in Potsdam and Edinburgh's Heriot-Watt University. “In CO2 mineralisation, the captured CO2 reacts with minerals (e.g., magnesium-rich or calcium-rich silicates) and can be stored permanently – and the resulting product could even bring in additional revenue,” IASS states, adding the mineralisation processes can produce cement additives that can be added to ordinary cement. By integrating CO2 mineralisation into the cement production process, CO2 emissions can be reduced by 8 to 33 percent and generate additional profit of up to 32 euros per tonne, provided certain conditions are met, the study published in Nature found. “The products need to be used as cement substitutes in cement mixtures in construction, for example, in bridges or buildings, and cement standards may need to be adjusted,” said researcher Till Strunge. “Moreover, CO2 storage in minerals must be eligible for ETS [Emissions Trading System] credits or similar.”

The global market size of cement is estimated to reach 463 billion US Dollars by 2026 – some six gigatonnes of cement per year, according to the study. Some 60 percent of emissions from the cement industry are process-inherent, resulting from the calcination of limestone, in which high temperatures are used to remove carbon dioxide from the material, the researchers explain. Carbon capture and storage technologies are an alternative, but incur additional production costs.

In 2020, German cement industry association VDZ presented plans to decarbonise cement and concrete as part of its efforts to become climate-neutral by 2050.

All texts created by the Clean Energy Wire are available under a “Creative Commons Attribution 4.0 International Licence (CC BY 4.0)” . They can be copied, shared and made publicly accessible by users so long as they give appropriate credit, provide a link to the license, and indicate if changes were made.
« previous news next news »

Ask CLEW

Researching a story? Drop CLEW a line or give us a call for background material and contacts.

info@cleanenergywire.org

+49 30 62858 497

We are hiring

Correspondent (m/w/d) - Berlin

Manager:In Finanzen & Operatives (m/w/d) (50%-100%)

Find more details here

Journalism for the energy transition

Get our Newsletter
Join our Network
Find an interviewee