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首页> 外文会议>International Conference on Greenhouse Gas Technologies >Planned Experimental Studies into the Nucleation and Precipitation Kinetics of Sulfate-Bearing Minerals under Conditions Relevant to CO2 Geological Storage
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Planned Experimental Studies into the Nucleation and Precipitation Kinetics of Sulfate-Bearing Minerals under Conditions Relevant to CO2 Geological Storage

机译：在与二氧化碳地质储存相关的条件下，计划的实验研究含有硫酸盐矿物质的核心和沉淀动力学

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Carbon Capture and Storage (CCS) has been widely recognized as one of the main technologies to mitigate climate change. Deep-saline aquifers are among the preferred potential repositories for CO2 currently being emitted to the atmosphere from burning of fossil fuels. Large-scale injection of supercritical CO2 into subsurface reservoirs induces a complex interplay of multiphase flow, capillary trapping, dissolution and chemical reactions that may have significant impacts on both, short-term injection performance and long-term fate of CO2 storage. To ensure the viability of geological CO2 storage, a holistic understanding of reactions at supercritical CO2-water-rock interfaces and the environmental factors affecting these interactions is required. The major objectives of this contribution are to study the kinetics of CO2 brine-rock interactions and derive respective chemical reaction rate expressions under the typical conditions of CO2 storage sites. These rate laws may be used in modeling the storage sites and operating them in a way that will minimize scaling and thus potential reduction of injectivity. A new experimental system was set up at the Water-Rock interaction laboratory, Ben-Gurion University of the Negev that allows studying the interaction between CO2, brine, and minerals under CO2 supercritical conditions. All equipment is fully capable to deal with adjustable PTX conditions enabling continuous and computerized data acquisition of various variables including pressure, temperature, stirring speed, in-situ measurement of pH and redox potential. The experimental setup allows the measurement of dissolution and precipitation rates of diverse minerals under a wide range of environmental conditions as found in CO2 storage sites offering the possibility to collect liquid and solid samples for further chemical and morphological analyses.
机译：碳捕获和储存（CCS）被广泛认为是减轻气候变化的主要技术之一。深盐含水层是目前从化石燃料燃烧到大气中的二氧化碳的首选潜在储存库中。将超临界CO2的大规模注入到地下储层中诱导多相流动，毛细血管捕获，溶解和化学反应的复杂相互作用，这可能对二氧化碳储存的短期注射性能和长期命运产生显着影响。为了确保地质二氧化碳储存的可行性，需要对超临界CO2-水岩界面处的反应的整体理解和影响这些相互作用的环境因素。本贡献的主要目标是研究CO2盐水岩相互作用的动力学，并在CO 2储存位点的典型条件下导出各自的化学反应速率表达。这些速率法可以用于建模存储网站并以最小化缩放的方式操作它们，从而使重新注入的潜在降低。在Negev的Ben-Gurion大学水岩相互作用实验室建立了一种新的实验系统，允许研究CO2超临界条件下二氧化碳，盐水和矿物质之间的相互作用。所有设备都完全能够处理可调节的P​​TX条件，使得连续和计算机数据采集的各种变量包括压力，温度，搅拌速度，原位测量pH和氧化还原潜力。实验设置允许在CO 2储存网站中发现的各种环境条件下测量各种矿物质的溶解和降水率，这提供了用于进一步化学和形态学分析的可能收集液体和固体样品。

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