Life Cycle Assessment of Carbon Capture via Dynamic Carbonation of Mineral Waste: Insights from the Mineral LOOP Project

The Mineral LOOP project explores an innovative approach to carbon capture through dynamic carbonation of mineral waste, with a focus on industrial waste streams. Utilizing an industrial pilot plant, the project investigates various waste types—including demolition wastes and thermal process residues—for their CO₂ sequestration potential and compatibility with dynamic carbonation. The goal is to convert these materials into durable, secondary construction products, such as fillers, that contribute to a circular economy while offering a viable pathway for large-scale carbon sequestration.
A Life Cycle Assessment (LCA) of this CO2 capture strategy is integrated into the Mineral LOOP project, serving as a critical decision-support tool. The LCA has two main objectives: (1) to support eco-design through each stage of waste processing, carbonation, and recycling operations, and (2) to evaluate the environmental relevance of this new recycling route by comparing its impacts to those of conventional waste treatments. This study mainly relies on primary data from the project’s industrial partners, including both conventional waste treatment data and upscaled measurements from the Mineral LOOP pilot plant. It employs an attributional approach for modeling and applies the substitution method to address the multifunctionality associated with recycling.
In line with climate targets and industry’s commitment to sustainable practices, the Mineral LOOP project highlights the essential role of cross-industry partnerships in advancing carbon capture solutions. By driving innovation in the valorization of mineral waste, this initiative paves the way for novel carbon capture strategies across sectors, while promoting circularity and reinforcing the foundation for a more sustainable and resource-efficient construction industry.