Using Lime to Capture CO2:
Project ANICA


Calix Technology captures the CO2 emitted when limestone is heated and decomposes to lime. The calcium looping concept uses this reaction along with its reverse counterpart (i.e. CO2 + lime -> limestone) to capture CO2 from exhaust gases from a range of industrial processes, including power generation.

In ANICA (Advanced Indirectly Heated Carbonate Looping Process), Calix has partnered with other organisations to investigate the capture of the combustion emissions from cement and lime plants, along with the existing capture of process emissions that LEILAC achieves.

As with SOCRATCES, CO2 is captured by lime in a ‘carbonator’ reactor, generating limestone. This limestone then travels to the LEILAC reactor where the CO2 is released as a high-purity gas and the lime is regenerated, ready to return to the carbonator. In this method, the combustion emissions from a lime or cement plant – as well as the process emissions – can be captured using Calix Technology, enabling a zero-emission, or even negative[1]emission, lime plant.

The project is funded by ACT, an initiative of the G7, and is led by the Technical University of Darmstadt, whose pilot plant is being used to test the process.

Tom Hills, Research Engineer

Calix Technology’s versatility enables us, working with our R&D partners, to invent and innovate exciting applications across a wide range of Global Challenges. We leverage our experience and relationships with universities, industry and government to transform these ideas into reality.

Find out more about ANICA Project

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