碳化渣中的杂质对CaCO3在碳化过程中的形态演变的影响
Zihe Pan1, Chunxia Cao1, Bo Wang1
1Institute of Resources and Environmental Engineering, Engineering Research Center of CO(2) Emission Reduction and Resource Utilization (Ministry of Education of the People's Republic of China), Shanxi University, Taiyuan, Shanxi, 030006, PR China.
Journal of environmental management
|June 8, 2024
概括
碳化渣杂质,特别是氧化铁,可以在二氧化碳矿化过程中将碳酸的形态从立方体转变为杆状. 这项研究澄清了杂质的影响,以便更好地利用废物和材料制造.
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:
- 乙生产的副产品碳化物渣 (CS) 含有丰富的Ca(OH) 2,使其成为将CO2矿化为CaCO3.3的潜在材料.
- 在CS中存在杂质可以显著影响CaCO3产品的形态,但这些影响和机制尚未完全理解.
- 了解杂质引起的形态变化对于优化CS利用和生产增值CaCO3材料至关重要.
研究的目的:
- 研究碳化碳渣中存在的杂质对二氧化碳矿化过程中碳酸 (CaCO3) 的形态演变的影响.
- 阐明Fe2O3和Al2O3等特定杂质影响CaCO3晶体形成的机制.
- 探索从CS制造特定CaCO3形态的潜力,如棒状石,用于实际应用.
主要方法:
- 碳化物渣 (CS) 和纯的Ca (OH) 2被用作碳化实验的来源.
- 实验在不同的条件下进行,包括固体-液体比率,二氧化碳流速和速度.
- 在控制度下添加特定杂质 (Al2O3和Fe2O3) 的效果被分析,以了解它们对CaCO3形态的影响.
主要成果:
- 酸盐 (CaCO3) 是碳化酸盐的主要产物.
- 石的形态从立方体演变为棒形,固体-液体比率,二氧化碳流量和速度不断增加.
- 发现Fe2O3杂质是促进棒状CaCO3形成的关键,表面湿透性和电荷起作用;Al2O3的影响最小.
结论:
- 该研究成功地确定了CS中的关键杂质,以及它们在碳化过程中对CaCO3形态的重大影响.
- 氧化铁 (Fe2O3) 杂质对于指导棒状石的形成至关重要,为受控材料合成提供了一条途径.
- 这项研究为有效利用碳化物渣减少二氧化碳和生产定制的CaCO3材料提供了宝贵的见解.
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