Decarbonising cement by scalling Calix technology

At the Carbon Capture, Utilization & Storage Virtual Forum 2021


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Andrew Okely, General Manager – Sustainable Processing at Calix, explores the ways to decarbonise the cement industry by scaling Calix Co2 mitigation technology for Cement and Lime , at the Carbon Capture, Utilization & Storage Virtual Forum 2021.

The Carbon Capture, Storage & Utilization Virtual Forum  examines the latest technology advances, business models, research findings, and real-world applications for capturing, storing and utilizing carbon dioxide.

About Calix’s technology and LEILAC

Calix’s technology re-engineers the existing process flows of a traditional calciner, indirectly heating the limestone via a special steel vessel. This unique system enables pure CO2 to be captured as it is released from the limestone, as the furnace exhaust gases are kept separate. It is also a solution which requires no additional chemicals or processes, and requires minimal changes to the conventional processes for cement as it simply replaces the calciner.

As two-thirds of CO2 emission from cement production is generated from the limestone itself, this technology offers a unique opportunity as it can capture these emissions without significant energy or capital penalty. The energy losses associated with Direct Separation technology are primarily heat losses in the equipment, and CO2 compression (for transport and storage).

It also enables the use of carbon capture techniques, which have been already developed by the power sector to be applied to the heating emissions.

This innovation requires minimal changes to the conventional processes for cement, replacing the calciner in the Preheater-Calciner Tower. For lime there is no product contamination from the combustion gas. The technology has the potential to be used with alternative fuels and other capture technologies to reach the targeted 80% emission reduction in 2050.

Find out more about LEILAC

Andrew Okely – General Manager Sustainable Processing

Andrew joined Calix in 2012 and is currently GM – Sustainable Processing and Commercial, overseeing the Sustainable Business line and general commercial activity including technology licensing and general contractual relationships across the Calix group.

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