Optimization of carbon capture, utilization, and storage supply chains for the hard-to-abate industry in Türkiye

Carbon dioxide plays a central role in driving climate change. Carbon capture, utilization, and storage (CCUS) has emerged as a critical mitigation option, particularly for hard-to-abate industrial sectors. This study introduces an optimization framework to evaluate the technical and economic feasibility of establishing a large-scale CO 2 infrastructure for the iron and steel, cement, and refining industries in Türkiye. The framework, developed using a mixed-integer linear programming approach, seeks to minimize the overall system costs by integrating multiple capture technologies, transportation means, geological storage options, and the possibility of CO 2 utilization through electro-Methanol production. The results indicate that the most economically efficient solution is achieved under a scenario which combines rail and pipeline transportation, and geological storage within national borders. For a 10% carbon reduction target, the lowest specific CO 2 avoidance cost is 68.0 €/t, while for a 90% target, the cost rises to 110.2 €/t.