不同温度和CO2压力下层状硅酸盐的碳矿化和锂提取:推进CO2安全储存和利用策略

IF 5.3 3区 工程技术 Q2 ENERGY & FUELS
Mohamed Abdalla,  and , Qingsheng Wang*, 
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引用次数: 0

摘要

减少人为二氧化碳排放的迫切需要需要强大的、可扩展的和安全的CCUS技术的进步。这项研究表明,在富含黑云母的系统中,仅在暴露于二氧化碳的24小时内,碳酸盐就能快速稳定地形成。通过一系列可控静态反应器实验,研究了不同温度(18-40℃)、压力(6-74 bar)和反应时间下的黑云母样品,揭示了其深刻的矿物学转变和地球化学动力学。黑云母与富CO2卤水条件的相互作用导致阳离子Mg、Fe、K、Ca和Li的释放,其中超临界CO2条件下释放的浓度最高。XRD和SEM分析发现,形成了稳定的碳酸盐矿物,包括方解石、菱铁矿和菱镁矿,直接证明了二氧化碳的快速矿化。一项首次在文献中报道的发现是氘化锂和氟化锂的形成,突出了在温和条件下(30°C, 6 bar)锂矿化的新途径,其中锂最初结合在黑云母结构中(2038 mg/kg),在二氧化碳诱导的反应中变得高度流动。这一发现为从沉积地层中回收锂开辟了一条新的地球化学途径,表明在富含粘土和云母的硅屑矿床中,如内华达州Thacker Pass锂矿床,可以通过二氧化碳辅助地球化学处理有效地提取大量锂资源。除锂外,实验还揭示了关键金属──Ni、Cu、Zn和Cr的大量动员,强调了关键金属回收的潜力以及与二氧化碳泄漏到浅层含水层相关的环境风险。这些发现重新定义了层状硅酸盐的作用,从被动的二氧化碳遏制结构到活性碳矿化反应器,能够以前所未有的速度促进永久的二氧化碳封存。此外,锂的动员和矿化同时发生带来了双重好处──安全的二氧化碳封存以及可持续的锂资源回收,这对全球能源转型至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Carbon Mineralization and Lithium Extraction in Phyllosilicates under Different Temperatures and CO2 Pressures: Advancing Secure CO2 Storage and Utilization Strategies

The urgent need to mitigate anthropogenic CO2 emissions necessitates the advancement of robust, scalable, and safe CCUS technologies. This study demonstrates rapid and stable carbonate formation in biotite-rich systems within just 24 h of CO2 exposure. Through a series of controlled static reactor experiments, biotite samples were subjected to varying temperatures (18–40°C), pressures (6–74 bar), and reaction durations, revealing profound mineralogical transformations and geochemical dynamics. The interaction of biotite with CO2-rich brine conditions led to the release of cations─Mg, Fe, K, Ca, and Li─with the highest concentrations observed under supercritical CO2 conditions. XRD and SEM analyses identified the formation of stable carbonate minerals, including calcite, siderite, and magnesite, directly evidencing rapid CO2 mineralization. A discovery, first to be reported in the literature, was the formation of lithium deuteride and lithium fluoride, highlighting a novel pathway for lithium mineralization under mild conditions (30°C, 6 bar), where lithium, initially incorporated within the biotite structure (2038 mg/kg), becomes highly mobile during CO2-induced reactions. This finding opens a new geochemical pathway for lithium recovery from sedimentary formations, suggesting that vast lithium resources hosted in clay- and mica-rich siliciclastic deposits, such as those in the Thacker Pass lithium deposit in Nevada, could be effectively extracted through CO2-assisted geochemical treatments. In addition to lithium, the experiments revealed substantial mobilization of critical metals─Ni, Cu, Zn, and Cr, emphasizing both the potential for critical metal recovery and environmental risks associated with CO2 leakage into shallow aquifers. These findings redefine the role of phyllosilicates from passive CO2 containment structures to active carbon mineralization reactors, capable of facilitating permanent CO2 sequestration at unprecedented rates. Furthermore, the cooccurrence of lithium mobilization and mineralization introduces a dual benefit─secure CO2 sequestration coupled with sustainable lithium resource recovery, critical for the global energy transition.

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来源期刊
Energy & Fuels
Energy & Fuels 工程技术-工程:化工
CiteScore
9.20
自引率
13.20%
发文量
1101
审稿时长
2.1 months
期刊介绍: Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.
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