混凝土生产的生命周期评估与碳捕获和碳上循环过程
Tianyu Chen1, Jacob P Nelson1, Vijay Gupta1
1RTI International, 3040 E. Cornwallis Rd, Research Triangle Park, NC, 27713, USA.
Journal of environmental management
|July 2, 2025
概括
在混凝土生产中利用二氧化碳 (CO2) 为减少其碳足迹提供了一个可持续的解决方案. 这些创新方法提高了混凝土的强度和耐用性,同时隔离了二氧化碳.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 混凝土生产是全球二氧化碳 (CO2) 排放的主要贡献者.
- 越来越需要可持续的建筑材料来缓解气候变化.
- 减少混凝土的碳足迹是建筑行业面临的关键环境挑战.
研究的目的:
- 在混凝土生产中探索和总结利用二氧化碳 (CO2) 的各种方法.
- 突出这些二氧化碳利用技术在减少混凝土碳足迹方面的潜力.
- 强调生命周期评估 (LCA) 在评估这些方法对环境的影响时的重要性.
主要方法:
- 混凝土的碳化:二氧化碳与氧化反应,形成碳酸.
- 用CO2激活混凝土:在混合或固化过程中注入CO2.
- 使用工业副产品 (污泥,飞灰) 碳化回收混凝土.
- 纳入生物炭用于二氧化碳封存和材料增强.
- 使用二氧化碳,将工业副产品转化为补充性水泥材料 (SCM).
- 燃烧后二氧化碳捕获过程的应用.
- 使用生命周期评估 (LCA) 进行环境影响评估.
主要成果:
- 几种二氧化碳利用方法有效地减少了混凝土的碳足迹.
- 这些技术可以提高混凝土的强度和耐用性.
- 工业副产品和生物炭在混凝土中对二氧化碳捕获具有前景.
- 燃烧后的二氧化碳捕获与混凝土生产相结合,可以大幅减少排放.
- 环境影响评估对于全面的环境影响评估至关重要.
结论:
- 在混凝土生产中利用二氧化碳,为建筑行业的脱碳提供了一个可行的战略.
- 这些方法不仅可以减轻环境影响,还可以在具体的性能上提供潜在的改进.
- 建议进一步研究和采用LCA来优化可持续的具体解决方案.
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