Carbon capture utilisation and storage

Carbon capture, utilisation and storage (CCUS) describes processes that capture CO2 emissions from industrial sources and either reuses them in other industrial processes or stores them for centuries or millennia so that they will not enter the atmosphere. CCUS is a crucial solution for the cement sector where a large share of emissions are not energy related but due to the specific chemistry of cement making.

The Green Cement Technology Tracker

We have partnered with the Leadership Group for Industry Transition (LeadIT) to develop The Green Cement Technology Tracker, which tracks public announcements of low-carbon cement investments aligned to corporate climate goals consistent with the Paris Agreement.

The Green Cement Technology Tracker currently includes carbon capture technologies. Carbon Capture and Storage (CCS) and Carbon Capture Utilisation and Storage (CCUS) account for 36 percent of planned reduction levers in the GCCA 2050 Roadmap for Net Zero Carbon Concrete. The tracker will be expanded include other technologies designed to reduce emissions from cement manufacturing.

Click here to use The Green Cement Technology Tracker

Carbon Capture

CO2 capture is still expensive today, but technology is improving and the significant number of demonstration facilities, currently being deployed in cement production, demonstrates the potential for significant cost reduction in the years ahead.&lt

A variety of different capture technologies are currently being tested in pilot projects across the globe. These include post combustion (e.g. chemical absorption by amines), direct separation, oxyfuel and calcium looping. Typically additional energy is needed for these technologies to operate the separation and handling processes

The 2030 goal is to have CCUS fully operational at 10 cement plants around the world

Captured CO2 can be used in the production of e-fuels and as a feedstock for the chemical industry. More specific uses are to promote crop growth in greenhouses and in the food and drinks industries.

The construction industry can also play its part in developing an economy forCO2 – and there are signs that this is happening. The process of carbonation has been long understood by engineers with respect to reinforced concrete and is rightly limited for the sake of durability. Recent development has focused on speeding up the reaction in various applications as a method of sequestering CO2. Potential applications include

• the manufacture of artificial aggregates

• curing concrete

• carbonation of recycled concrete.

SequestrationCO2 can be sequestrated in geological formations which would avoid it being released into the atmosphere.

Infrastructure Both solutions, utilisation or sequestration, require the development of infrastructure between the source and point of use or storage.