Mitchell Cement Plant

The Heidelberg Materials Mitchell Cement Carbon Capture Project in Mitchell, Indiana is a planned full-scale retrofit designed to capture CO₂ from clinker production and auxiliary plant flue gas at Heidelberg’s cement facility. The project is engineered to capture up to 2 million metric tons of CO₂ per year at roughly 95 percent capture efficiency, positioning it among the largest proposed cement carbon capture projects in the United States. Front-End Engineering Design work evaluated an amine-based post-combustion capture system integrated with existing kiln operations, along with on-site CO₂ compression and transport infrastructure connected to geological storage formations in the Illinois Basin. The FEED phase was supported by a $3.7 million DOE award within a total $5.8 million project budget and included engineering led by Mitsubishi Heavy Industries America and Sargent & Lundy. While Heidelberg continues to advance project planning and long-term decarbonization strategy at the Mitchell site, the most recent federal demonstration funding for the next development phase was withdrawn, delaying construction timelines but not cancelling the project.