Decarbonising cementitious materials through carbon capture and utilisation (CO24Cem)

通过碳捕获和利用实现胶凝材料脱碳（CO24Cem）

• 批准号: EP/Y001370/1
• 负责人: Rupert Myers
• 金额: $ 161.87万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FY001370%2F1
• 关键词: Decarbonising; cementitious; materials; through; carbon

Decarbonising concrete production is important since it is directly responsible for ~9% of global CO2 emissions. Academic research in low carbon concrete has overwhelmingly focused on a limited set of supply-side decarbonisation measures, such as carbon capture and storage, broadly overlooking the huge potential of carbon capture and utilisation. CO24Cem will address this knowledge gap and decarbonisation goal by delivering a near-zero CO2 emissions cement produced by carbonating end-of-life concrete with waste CO2. The main scientific aim in CO24Cem is to create this carbonated cement with sufficiently high reactivity so it contains ~0% Portland cement clinker, which is the high-CO2 material produced in cement plants. This aim will be achieved by making breakthrough advancements in cement chemistry and carbonation process technology, which will involve chemical modification of the carbonation reactor feedstock (end-of-life cement paste), optimisation of the carbonation reactor conditions, and the use of novel combinations of materials in its mix design. Success here will create an important pathway to completely decarbonise European cement production and achieve ~100% recycling of non-energy materials in this industry. The breakthrough cement technology will also have excellent use potential globally at the multiple gigaton scale. In CO24Cem, near-zero CO2 emissions concrete products will be produced using this breakthrough technology, accompanied by a life cycle assessment study, to demonstrate its feasibility and the massive potential beneficial impacts. Overall, CO24Cem represents a significant step towards decarbonising the cement and concrete industries, which is one of the most difficult to achieve yet essential aspects of 1.5-2 C temperature rise climate change mitigation targets.

脱碳混凝土生产非常重要，因为它直接造成全球约9%的二氧化碳排放。低碳混凝土的学术研究绝大多数集中在有限的供给侧脱碳措施上，例如碳捕获和储存，而广泛忽视了碳捕获和利用的巨大潜力。CO24 Cem将通过提供一种接近零二氧化碳排放的水泥来解决这一知识差距和脱碳目标，这种水泥是通过用废弃的二氧化碳对报废混凝土进行碳酸化来生产的。CO24 Cem的主要科学目标是生产这种具有足够高反应性的碳酸化水泥，因此它含有约0%的波特兰水泥熟料，这是水泥厂生产的高CO2材料。这一目标将通过在水泥化学和碳酸化工艺技术方面取得突破性进展来实现，这将涉及碳酸化反应器原料（报废水泥浆）的化学改性，碳酸化反应器条件的优化以及在其混合设计中使用新型材料组合。该项目的成功将为欧洲水泥生产完全脱碳和实现该行业非能源材料100%回收利用开辟一条重要途径。这一突破性的水泥技术也将在全球范围内具有数十亿吨级的巨大应用潜力。在CO24 Cem中，将使用这一突破性技术生产近零二氧化碳排放的混凝土产品，并进行生命周期评估研究，以证明其可行性和巨大的潜在有益影响。总的来说，CO24 Cem代表了水泥和混凝土行业脱碳的重要一步，这是1.5-2 ℃温升气候变化减缓目标中最难实现的重要方面之一。