CO2 mitigation levers and utilisation in the cement industry: Michel Gimenez, LafargeHolcim CIP (France)

Filmed at Cemtech Europe 2015, 20-23 September, Intercontinental Hotel, Vienna, Austria.

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Good afternoon everyone. Thank you for the introduction and for inviting me to make this presentation. So I will make the presentation around, let's say the results we have obtained LafargeHolcim, although in CO2 project let's say, and associated projects. Although, we must admit that this presentation is more based on the legacy of the Lafarge work due to the recent merger, and this is a summary of what we have done let's say over the last 10 years dealing with this topic.

Several speakers have already spoke about the levers, the usual levers of our industry as in hand to reduce the CO2 emissions. I am telling from a number that is also spoken of that. So we'll be short, but we have got roughly three main levers. Although, raw materials could also enter into the picture, but until now we have the addition ratio let's say, the more cement we can produce with a lower clinker content.

So we have several additions, and you see that this lever is very efficient. Clinker production is 830 or 40 kg of CO2 per tone, and then if we look at the final results with all levers like alternative fuels, the control of specific heat consumption, and clinker ratio, clinker to cement ratio, we are ending now at let's say, lower than 600 kg.

So these are all the usual levers we have. Then we can, we had a look to breakthrough levers. Of course, usually people speak of CCS, and has been mentioned already. Nearly 46 or 50% of the CO2 reduction, our industry should produce would come from CCS, so carbon capture and sequestration or storage, geological storage.

We have also several others levers breakthrough with new products, new low CO2 products as compared to Portland. So we have Larfage and LafargeHolcim now, low burning projects like Aehter which is a sulpho, belite sulphoaluminate cement base which could reduce our emissions by 30% as Portland replacement of course, and then we're currently developing a new product, a common table product also called Solidia with a collaboration contract with Solidia company and Lafarge, and LarfageHolcim, and this is a brand new product.

We will go in much more details during the presentation.
Then if you want to carbonate, and use CO2, we need CO2, this is obvious of course, but we will see that it's not so simple. Then we see also that high concentrations you do is quite expensive, especially if you want to capture it from diluted sources like the cement Heracles, and stacks.

If you go more into details on the Solidia project and Solidia product, this is a true breakthrough, I can say. This product, new product can substitute Portland in certain applications. For the moment it's precast only and nonstructural, but it can be burnt in the same kilns with our re-kilns[sp?] PF, and in so the process for setting and strength acquisition is not anymore hydration like Portland, or Aether, or sulphoaluminate, but on the contrary carbonation. Meaning the chewing chambers, you can switch from steam in concrete plants to carbonation chewing chambers.

We have already performed two successful trials in this re-production of 5,000 bonds of this new product in North America and Hungary, let's say three months ago. So as I said for the moment the market is restricted to precast and nonstructural. Although, of course we will improve this, and try to enlarge the market. We expect this product to emit 70%

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