Carbon capture and utilization (CCU) is an essential method to sequester unavoidable CO₂ emissions in regions with insufficient geological storage capacities. Nonetheless, there are several uncertainties and knowledge gaps in terms of the future value chains of some CCU technologies (e.g. carbonation). This paper analyzes the potentials of coupling CCU with the supply chains of the construction industry by means of carbonating the concrete products and waste concrete in the German federal state of North Rhine–Westphalia. Based on extensive data and statistical analyses, the locations and outputs of the concrete and recycling plants have been determined in order to quantify their CO₂ sequestration capacities. Location-allocation models have been applied to allocate the carbon sources to the potential carbon sinks and calculate the minimum transportation costs.

The analysis shows that the total annual sequestration capacity is up to 1 Mt CO₂ with an average transportation distance of 37.4 km (8.3 EUR/ton). Nonetheless, some emission sources have a clear comparative advantage in terms of their proximity to the carbon sinks as the distance ranges between 0.7 km and 99.7 km. Also, some carbon sinks have a comparative advantage in terms of capacities and technology readiness levels. Therefore, the paper also presents models for the different products in order to display the potentials of each category separately and offer more flexibility to the stakeholders.

碳捕获和利用 (CCU) 是在地质储存能力不足的地区隔离不可避免的 CO ₂排放的重要方法。尽管如此，就某些 CCU 技术（例如碳化）的未来价值链而言，存在一些不确定性和知识差距。本文通过对德国北莱茵-威斯特法伦州的混凝土产品和废混凝土进行碳化，分析了将 CCU 与建筑行业供应链耦合的潜力。基于广泛的数据和统计分析，已确定混凝土和回收厂的位置和产量，以量化其 CO ₂封存能力。已应用位置分配模型将碳源分配到潜在碳汇并计算最低运输成本。

分析表明，年总封存能力高达 1 Mt CO ₂，平均运输距离为 37.4 公里（8.3 欧元/吨）。尽管如此，一些排放源在接近碳汇方面具有明显的比较优势，因为距离范围在 0.7 公里到 99.7 公里之间。此外，一些碳汇在容量和技术准备水平方面具有比较优势。因此，本文还提出了不同产品的模型，以便分别展示每个类别的潜力并为利益相关者提供更大的灵活性。