在CO2-丰富的盐水中自然变化的玄武岩的活性和溶解特征:对CO2矿化的影响
Jiajie Wang1, Masahiko Yagi2, Tetsuya Tamagawa2
1Department of Environmental Studies for Advanced Society, Graduate School of Environmental Studies, Tohoku University, Sendai 980-0845, Japan.
ACS omega
|February 5, 2024
概括
改变的玄武岩对二氧化碳 (CO2) 储存有希望. 它们在二氧化碳矿化过程中迅速溶解 (Mg),为永久的二氧化碳封存提供了一条可行的途径.
科学领域:
- 地质化学 地质化学
- 矿物学是什么?矿物学是什么?
- 环境科学 环境科学
背景情况:
- 水热变化的玄武岩是丰富且易于获得的地质材料.
- 通过矿化永久储存二氧化碳是缓解气候变化的关键战略.
- 了解改变的玄武岩与二氧化碳的反应性对于有效的碳捕获至关重要.
研究的目的:
- 为了研究含有富含二氧化碳的流体的水热变化的玄武岩的反应性和溶解.
- 为了比较改变的玄武岩与未改变的玄武岩的二氧化碳矿化潜力.
- 为在碳储存技术中利用改性玄武岩提供理论支持.
主要方法:
- 模拟水库条件 (100°C,5MPa CO2) 的批量热水实验.
- 从基岩粉末和块与富含二氧化碳的盐水发生反应的元素液的分析.
- 与未经改变的玄武岩相比,改变的玄武岩反应性的比较.
主要成果:
- 改变的玄武岩在粉末实验中显示了比不改变的玄武岩更低的总体元素出率.
- 在块实验中,改变的玄武岩表现出快速,偏好的溶解,释放显著的.
- 从改变的玄武岩中溶解的速度比溶解的速度更快,这表明了主导的碳化阶段.
结论:
- 由于偏好的Mg溶解,改变的玄武岩是二氧化碳矿化的一个有希望的原料.
- 改性玄武岩中的碳化过程可能与新鲜玄武岩不同,最初的碳化是Mg.
- 这项研究支持开发用于永久储存二氧化碳的改变基岩利用方法.
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