en.Wedoany.com Reported - Spain's All4Zero Innovation Center has completed a technology validation that fixes carbon dioxide using industrial waste, confirming that certain industrial by-products can stably and permanently absorb and retain CO₂.

The technology, named HECO®, was developed by SBS and evaluated together with Holcim, ArcelorMittal, and Terresis in three strategic activities: cement manufacturing, steel production, and mining. The system not only reduces emissions but also generates materials with new industrial applications.

The HECO® process is based on the accelerated mineralization of alkaline solid waste, during which CO₂ is permanently retained in the structure of the treated material, ultimately yielding reusable minerals or aggregates. The trials studied eight different materials, seven of which showed viable results, indicating the potential of this solution to adapt to various types of industrial by-products.

The resulting materials possess properties that make them suitable for specific uses in the construction sector, including as recycled aggregates, filling materials, or components for low-carbon footprint cement and binders. Aitor Pablos, Business Development Manager at SBS, stated that the technology can convert CO₂ emissions into materials with potential applications in construction and other industries, promoting a circular and low-carbon economy. Verónica Climent, Industrial Performance Manager at Holcim, noted that this proof of concept demonstrates that CO₂ can be permanently and safely stored in different industrial by-products, and the results confirm the feasibility of advancing preliminary designs for future treatment plants and their industrial scaling analysis.

Following this trial, the goal is to launch a pilot plant capable of operating under real conditions using HECO® technology, with the final decision depending on factors such as energy balance and integration with existing facilities. Jorge Baños, General Manager of Terresis España, believes that this model offers an opportunity to promote a circular economy through by-product valorization while reducing CO₂ emissions.

All4Zero was born two and a half years ago, driven jointly by ArcelorMittal, Holcim, Iberia, and Repsol. Currently, the center brings together 27 additional companies, aiming to support technologies that reduce emissions and promote resource utilization to achieve net-zero emissions by 2050.

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