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首页> 外文学位 >A Study of Surface Treatments on Carbonate Core Material for Application to Mineral Precipitation and Dissolution during Geologic Carbon Storage.
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A Study of Surface Treatments on Carbonate Core Material for Application to Mineral Precipitation and Dissolution during Geologic Carbon Storage.

机译：碳酸盐岩心材料的表面处理研究，用于地质碳储藏中的矿物沉淀和溶解。

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摘要

Underground injection of acid gas has been studied for several decades for oil field applications, such as enhanced oil recovery (EOR), but is now being studied as a solution to climate change. This research aims to simulate underground conditions at injection sites, such as the pilot scale injection site located near the site of a coal fired power facility in the Black Warrior Basin of Alabama. This proposed carbon capture and sequestration (CCS) location would involve injection of liquid CO2 into a carbonaceous saline aquifer.;The objective of this study was to investigate carbonate surface treatments that alter the kinetics and mechanism of mineral dissolution resulting from the injection of an acid gas (CO2) into a geologic formation. A variety of mineral coatings were tested in an attempt to preserve mineral integrity under acidic conditions. Surface active chemicals were first tested, including scale inhibitors, followed by a novel acid induced surface treatment that precipitates an inorganic layer on the calcite to preserve the acid soluble mineral. These experiments are the first to investigate the use of scale inhibitors for mineral preservation, although were found ultimately to have little impact on dissolution kinetics. However, anions of moderate to strong acids induced surface coatings that were determined to effectively inhibit dissolution.;Additionally, a novel, high pressure flow-through experimental apparatus was developed to simulate pressure and temperature conditions relevant to injection sites. Similar mineralogical studies in the literature have used pressurized, unstirred, batch systems to simulate mineral interactions. Solids with an acid induced surface coating were tested in the high pressure column and no calcium was found to leave the column.
机译：地下注入酸性气体已经被研究了数十年，用于油田应用，例如提高采收率（EOR），但是现在正在研究它作为解决气候变化的方法。这项研究旨在模拟注入点的地下条件，例如位于阿拉巴马州黑武士盆地燃煤发电设施附近的中试注入点。拟议的碳捕集与封存（CCS）位置涉及将液态CO2注入碳质盐水层中。本研究的目的是研究碳酸盐表面处理，这些表面处理会改变注入酸引起的矿物溶解的动力学和机理。气体（CO2）进入地质构造。为了在酸性条件下保持矿物完整性，对各种矿物涂层进行了测试。首先测试了表面活性化学品，包括阻垢剂，然后进行了新的酸诱导表面处理，该表面处理使方解石上的无机层沉淀，从而保留了酸溶性矿物。这些实验是第一个研究使用阻垢剂进行矿物质保存的实验，尽管最终发现它们对溶出动力学的影响很小。然而，中等至强酸的阴离子可诱导表面涂层，可有效抑制溶解。此外，开发了一种新型的高压流通实验设备，可模拟与注射部位相关的压力和温度条件。文献中类似的矿物学研究已使用加压的，未搅拌的批处理系统来模拟矿物相互作用。在高压色谱柱中测试了带有酸诱导的表面涂层的固体，未发现钙从色谱柱中逸出。

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  • 作者

    Work, Sarah Nicole.;

  • 作者单位

    Rice University.;

  • 授予单位 Rice University.;
  • 学科 Environmental engineering.;Geochemistry.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 205 p.
  • 总页数 205
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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