Calix and Tarmac to cut CO2 emissions in lime production

Industrial technology company Calix is moving ahead on yet another front, announcing an agreement to implement its calcination process to reduce in-process carbon dioxide emissions in the production of lime.

The company, which is developing a world-first zero emissions lime kiln with Australian group Adbri, will co-develop a project with construction materials manufacturer Tarmac to produce 30,000 tonnes of lime per annum at a site to be determined in the United Kingdom.

The companies will conduct a feasibility study and front-end engineering design (FEED) studies, including demonstrating the capture of 20,000 tonnes a year of CO2.

Partly funded by the UK’s Net Zero Innovation Portfolio initiative, a final investment decision is yet to be made on the plant.

A Calix technology calciner with electrical calcination and CO2 off-gas capture will replace today’s method of producing lime from natural limestone by burning the stone in a kiln.

Calix CEO Phil Hodgson said: “Lime is one of the most important industrial products globally, and it is great to be developing this in partnership with Tarmac.”

Lime or calcium oxide is the most important ingredient of cement and also used in making steel, aluminium, and rare earths.

However one tonne of CO2 is currently produced for every tonne of lime.

On Monday Calix signed a deal to implement its calcination process with Vienna-based RHI Magnesita NV to produce refractories.

Picture: Tarmac

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