性固体废物在CO2矿化和利用中的性能和机制
Yongpeng Zhang1, Guoxiong Zhan2, Zhoulan Huang2
1School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, ZhengZhou 450046, PR China.
Waste management (New York, N.Y.)
|January 3, 2024
概括
这项研究通过采用氨酸介导工艺,利用性固体废物 (ASW) 增强了二氧化碳矿物封存. 这种方法提高了碳化效率,并为干旱土地应用创造了环保产品.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
背景情况:
- 使用性固体废物 (ASW) 的二氧化碳矿物封存提供了减少排放和再利用工业副产品的双重好处.
- 当前方法的挑战包括在低pH下缓慢的Ca/Mg离子浸出,限制碳化效率.
- 开发高效的二氧化碳捕获和利用战略对于减缓气候变化至关重要.
研究的目的:
- 通过使用各种ASW来研究一种胺介导的二氧化碳吸收和矿化过程.
- 评估不同ASW的二氧化碳矿化能力,重点关注碳化渣 (CS) 和钢渣 (SS).
- 探索由此产生的CO2-ASW产品的生态应用,特别是用于干旱地区的节水.
主要方法:
- 一个新的氨基介导CO2吸收和矿化过程被开发和测试了六种常见的ASWs.
- 分析了速率和颗粒大小对二氧化碳捕获效率的影响.
- 钢渣 (SS) 被用作含有不同度的单乙胺 (MEA) 的矿物质介质,以优化Ca2+提取和CO2去除.
主要成果:
- 碳化渣 (CS) 呈现出最高的二氧化碳矿化能力 (86.2 g-CO2/kg-CS).
- 用钢 (SS) 进行胺基介导的二氧化碳捕获,显著提高了二氧化碳去除效率,从49%提高到92%以2mol/L MEA.
- 多孔矿化产品 (30.6 m2/g) 的特点是球形的阿拉戈尼特或针状石结构.
- 冲洗后的SS矿化产品显示出微不足道的毒理作用,豆种子的生长速度为4mm/d.
结论:
- 氨基酸介导的过程有效地增强了ASW中的二氧化碳矿化,特别是钢.
- 该研究证明了利用CO2-ASW产品在干旱和沙土地的水资源节约方面的一种可行的方法.
- 这种方法为工业废物利用和碳捕获提供了一个可持续的途径.
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