Holcim invests in Capsol’s carbon capture tech to push on-site emissions reduction in cement industry

Holcim has taken an equity stake in Norwegian carbon capture specialist Capsol Technologies as part of a wider push to scale on-site emissions abatement across its cement operations, according to Carbon Herald and Holcim’s own announcement. The move formalises a cooperation that began with a CapsolGo® demonstration campaign at Holcim’s Dotternhausen plant in southern Germany in 2025 and signals a shift from pilot validation toward longer-term industrial deployment.

Capsol’s system uses hot potassium carbonate (HPC) solvent in a post-combustion chemical absorption process and incorporates heat recovery within a compact, stand-alone unit. According to Capsol’s corporate materials, the approach is built on a mature solvent technology that has been applied in industrial gas treatment and is designed to reduce the energy penalty that normally accompanies CO2 capture at high-temperature sites such as cement plants. GlobalCement’s reporting on the Dotternhausen campaign described the demonstration as a turnkey test to generate the operational data needed for scale-up.

Holcim presents the investment as consistent with its decarbonisation pathway and its commercial ambition to offer near-zero cement at scale. The company said the partnership pairs its operational know-how with Capsol’s capture platform to explore commercial opportunities across its global portfolio. Industry observers note that on-site capture addresses process emissions from clinker manufacture that cannot be removed solely by changing fuels, making such technologies a strategic lever in the sector’s emissions reductions toolbox.

The stake also sits within Holcim’s broader venture strategy. Holcim’s MAQER Ventures screens hundreds of climate and construction technology startups annually and has announced a string of strategic investments aimed at diversifying low-carbon product and process options. Holcim has recently invested in other decarbonisation ventures, including Sublime Systems, and is collaborating with energy company Eni on CO2 repurposing and mineralisation research, illustrating a multi-pronged approach that combines capture, alternative materials and carbon utilisation.

For industrial decarbonisation professionals, Capsol’s offering highlights two trade-offs to assess: technology readiness and operational energy cost. Capsol and Holcim emphasise the energy-efficiency gains from solvent choice and integrated heat recovery, yet capture at cement scale still requires careful integration with kiln heat management, steam systems and plant economics. According to Capsol’s website, its licensing model targets not only cement but also biomass, energy-from-waste and gas-turbine segments, suggesting potential cross-sector deployment opportunities and revenue streams for licensors and host operators.

The Dotternhausen demonstration will remain an important reference point as Holcim and Capsol move toward commercialization. Holcim said the demonstration delivered critical data under real operating conditions; Capsol framed the deal as the logical next step in a longer industrial collaboration. As regulators tighten emissions requirements and customers demand lower-carbon building materials, partnerships that couple developer expertise with incumbent industry scale could determine which capture solutions move from demonstration to widespread adoption.

Industry data and recent project pipelines suggest on-site capture will be just one element of a decarbonisation portfolio that also includes low-carbon binders, alternative fuels and CO2 mineralisation. Holcim’s investment underlines a strategic bet that integrating capture with heat optimisation and downstream carbon use or storage will be commercially viable at the scale of cement manufacture, but the ultimate test will be deployment across multiple plants with transparent performance and cost outcomes.