铁替代和溶液成分对布鲁石碳化的影响
Colton J Vessey1, Maija J Raudsepp1, Avni S Patel1
1Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada.
Environmental science & technology
|April 5, 2024
概括
使用布鲁矿在矿山尾矿中的碳矿化可以储存二氧化碳,但随着铁的替代,效率会下降. 氧气条件形成铁氧化物,而无氧条件产生铁碳酸盐,影响长期碳储存潜力.
科学领域:
- 地质化学 地质化学
- 环境科学 环境科学
- 矿物学是什么?矿物学是什么?
背景情况:
- 碳中和或负碳采矿策略可以将碳矿化整合到矿山运营中.
- 在超矿尾矿中的布鲁石[Mg(OH) 2]具有快速碳化的潜力.
- 铁铁[Fe(II) 替代布鲁石对碳矿化的影响尚未完全理解.
研究的目的:
- 为了评估碳储存在合成Fe (II) 替代型石中的效率.
- 调查Fe(II) 替代对碳矿化产品和效率的影响.
- 评估氧化/无毒条件和背景电解质对碳化的影响.
主要方法:
- 进行了碳化实验,使用合成布鲁石与不同的Fe(II) 替代 (044mol%).
- 在有氧和无氧条件下进行了实验,使用10%的CO2.
- 使用NaCl,Na2SO4和Na4SiO4背景电解质进行评估碳化.
主要成果:
- 碳化效率随着石中Fe (II) 替代的增加而显著下降.
- 在氧化条件下,化和分层的双氧化物形成有限的碳化.
- 无氧条件产生了Fe (II) 替代的内斯奎霍尼特,迪平尼特和丘卡诺维特.
- 富含酸盐的电解质由于无形和Fe-Mg酸盐的形成而降低了碳化效率.
- 碳化效率在化物和硫酸盐溶液中是相似的.
结论:
- 石中的Fe (II) 替代对碳矿化效率产生负面影响.
- 反应产物和碳储存命运取决于Fe (II) 含量和环境条件 (有氧或无氧).
- 溶解的二氧化可以阻碍矿山尾矿中的碳矿化过程.
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