温室气体排放和脱碳潜力全球烧土生产的温室气体排放和脱碳潜力
Josefine A Olsson1, Hisham Hafez2, Sabbie A Miller1
1Department of Civil and Environmental Engineering, University of California, Davis, California 95616, United States.
Environmental science & technology
|January 23, 2025
概括
全球燃烧粘土 (FCB) 产量对温室气体 (GHG) 排放作出了重大贡献. 新的模型估计目前的年度排放量为5亿tCO2e,突出了建筑材料行业脱碳战略的需要.
科学领域:
- 建筑材料科学 建筑材料科学
- 环境科学 环境科学
- 气候变化缓解缓解 气候变化缓解
背景情况:
- 烧土 (FCB) 是全球普遍的,低成本的建筑材料,特别是在发展中国家.
- 预计住房需求的增加将增加FCB产量,可能会增加相关的温室气体 (GHG) 排放.
- 准确估计需求和排放量对于制定有效的脱碳战略至关重要.
研究的目的:
- 开发新的代理模型来估计全球烧土的消费和相关的温室气体排放.
- 在温和的气候变化减缓情景下预测未来的FCB需求和排放 (SSP 2-4.5).
- 评估FCB行业通过各种脱碳化途径减少温室气体排放的潜力.
主要方法:
- 使用国家特定的粘土开采数据,动态建筑库存建模和材料强度开发了消费预测模型.
- 创建了一个温室气体排放模型,利用基于文献的数据和特定于生产技术的输入.
- 预测到2050年,并分析了三个脱碳化战略:提高能源效率,采用最佳实践,用空心混凝土块替代材料.
主要成果:
- 目前全球FCB消耗量估计为每年2.18 Gt,产生约5亿tCO2e (占全球温室气体排放量的1%).
- 如果没有干预,在温和排放情景下,到2050年,FCB排放可能会增加到全球温室气体排放量的3.5-5%.
- 探索的脱碳途径包括能源效率 (27%的降低),转向最佳实践 (49%的降低),并用混凝土块代替一半的FCB需求 (51%的降低).
结论:
- 烧土生产是全球温室气体排放的重要和不断增长的来源.
- 强大的建模对于量化影响和指导建筑材料行业的缓解努力至关重要.
- 实施能源效率,最佳实践和材料替代可以大幅减少生产的碳足迹.
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