Bocahut Haut-Lieu Lime Kiln CCS Pilot

French cryogenic carbon capture developer Revcoo has been operating an industrial demonstrator of its CarbonCloud technology at Eiffage's Bocahut limestone quarry and lime kiln in Haut-Lieu, Nord department, Hauts-de-France region, France, near Avesnes-sur-Helpe. The demonstrator has been on-site since November 2024, connected to the flue gas stack of one of the Bocahut lime kilns, and uses Revcoo's proprietary cryogenic process to freeze and separate CO₂ from the kiln flue gas without chemical solvents or water. Through the first half of 2025 Revcoo was working through operational parameter optimization on the demonstrator, targeting 72 hours of continuous operation as an initial milestone, with the ultimate ambition of scaling the on-site installation to capture up to 10% of the Bocahut site's total CO₂ emissions. The Bocahut pilot is Revcoo's flagship demonstrator and reference deployment, sitting alongside earlier deployments in the cement industry, and it's the technology validation platform behind Revcoo's broader commercial rollout plan (including the recently announced Reazn Kruisem zinc plant project in Belgium). Revcoo founder and president Hugo Lucas has stated an ambition of capturing approximately 1 million tonnes per year of CO₂ across the company's deployed fleet by 2030.