循环流化床燃烧 (CFBC) 灰作为二氧化碳储存介质的特征以及通过回收碳化灰来开发建筑材料
Young Min Wie1, Ki Gang Lee1, Kang Hoon Lee2
1Department of Materials Engineering, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-si 16227, Republic of Korea.
Materials (Basel, Switzerland)
|September 14, 2024
概括
循环流化床燃烧 (CFBC) 灰的矿物碳化提供了碳储存潜力. 回收碳化CFBC灰增强了混凝土的性能,提高了早期的强度,并使泡混凝土可以替代水泥.
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:
- 循环流化床燃烧 (CFBC) 灰是热电厂的副产品.
- 矿物碳化是一种可行的二氧化碳封存方法.
- 将工业副产品回收成建筑材料有助于促进可持续性.
研究的目的:
- 通过矿物碳化验证CFBC灰作为碳储存媒介.
- 为了研究由碳化CFBC灰制成的建筑材料的特性.
- 评估使用碳化CFBC灰作为混凝土添加剂和泡混凝土的可行性.
主要方法:
- 在不同的二氧化碳流速和固体含量下,研究了CFBC灰炭化.
- 在混凝土添加剂中作为水泥替代品 (0-20%) 加入碳化CFBC灰.
- 制造并测试泡混凝土,使用0-30%重量%的水泥替代.
- 测量了泥的特性 (密度,流量,沉积) 和硬化材料的特性 (密度,压力强度,导热率).
主要成果:
- 泥中的CFBC灰碳化不同于固体气体系统.
- 碳化CFBC灰提高了5-12%的水泥砂的7天强度.
- 泡混凝土用25%重量%的水泥替代物实现了0.58 g/cm3的密度和2.1 MPa的28天强度,符合标准.
结论:
- 通过矿物碳化,CFBC灰对碳储存有效.
- 回收碳化CFBC灰可用于混凝土和泡混凝土生产.
- 这个过程为管理CFBC灰和生产建筑材料提供了一个可持续的途径.
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