• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Conversion & Management >Sequestration of CO_2 in geological media in response to climate change: capacity of deep saline aquifers to sequester CO_2 in solution
【24h】

Sequestration of CO_2 in geological media in response to climate change: capacity of deep saline aquifers to sequester CO_2 in solution

机译：响应气候变化而隔离地质介质中的CO_2：深层盐水层将CO_2隔离在溶液中的能力

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Geological sequestration is a means of reducing anthropogenic atmospheric emissions of CO_2 that is immediately available and technologically feasible. Among various options, CO_2 can be sequestered in deep aquifers by dissolution in the formation water. The ultimate CO_2 sequestration capacity in solution (UCSCS) of an aquifer is the difference between the total capacity for CO_2 at saturation and the total inorganic carbon currently in solution in that aquifer, and depends on the pressure, temperature and salinity of the formation water. Assuming non-reactive aquifer conditions, the current carbon content is calculated using standard chemical analyses of the formation waters collected by the energy industry on the basis of the concentration of carbonate and bicarbonate ions. Formation water analyses performed at laboratory conditions are brought to in situ conditions using a geochemical speciation model to account for dissolved gasses that are lost from the water sample. To account for the decrease in CO_2 solubility with increasing water salinity, the maximum CO_2 content in formation water is calculated by applying an empirical correction to the CO_2 content at saturation in pure water. The UCSCS in an aquifer is calculated by considering the effect of dissolved CO_2 on the formation water density, the aquifer thickness and porosity to account for the volume of water in the aquifer pore space and for the mass of CO_2 dissolved in the water currently and at saturation. The methodology developed for estimating the ultimate CO_2 sequestration capacity in solution in aquifers has been applied to the Viking aquifer in the Alberta basin in western Canada. Considering only the region where the injected CO_2 would be a dense fluid, the capacity of the Viking aquifer to sequester CO_2 in solution in the formation water is calculated to be 100 Gt. Simple estimates then indicate that the capacity of the Alberta basin to sequester CO_2 dissolved in the formation waters at depths greater than 1000 m is on the order of 4000 Gt CO_2. The results also show that using geochemical models to bring the analyses of the formation waters to in situ conditions is not warranted when the current total inorganic carbon (TIC) in the aquifer water is very small by comparison with the CO_2 solubility at saturation. Furthermore, in such cases, the current TIC may even be neglected.
机译：地质封存是减少人为大气中CO_2排放的一种方法，该方法可立即获得并且在技术上可行。在各种选择中，可通过溶解在地层水中将CO_2隔离在深层含水层中。含水层中溶液的最终CO_2隔离能力（UCSCS）是饱和时CO_2的总容量与该含水层中当前溶液中的总无机碳之间的差，并取决于地层水的压力，温度和盐度。假定非反应性含水层条件，使用碳酸盐和碳酸氢根离子浓度对能源行业收集的地层水进行标准化学分析，计算出当前碳含量。使用地球化学形态模型将在实验室条件下进行的地层水分析置于现场条件下，以解决从水样中损失的溶解气体的问题。为了说明随水盐度增加而降低的CO_2溶解度，可通过对纯水中饱和时的CO_2含量进行经验校正来计算地层水中的最大CO_2含量。通过考虑溶解的CO_2对地层水密度，含水层厚度和孔隙率的影响来计算含水层中的UCSCS，以考虑含水层孔隙空间中的水量以及目前和目前溶解于水中的CO_2的质量。饱和。用于估算含水层溶液中最终CO_2螯合能力的方法学已应用于加拿大西部艾伯塔盆地的维京含水层。仅考虑注入的CO_2为稠密流体的区域，计算得出的维京含水层将CO_2螯合在地层水中的能力为100 Gt。然后，简单的估算表明，艾伯塔省盆地隔离溶解在大于1000 m的地层水中的CO_2的能力约为4000 Gt CO_2。结果还表明，与饱和时的CO_2溶解度相比，当含水层中当前的总无机碳（TIC）很小时，不需使用地球化学模型将地层水的分析带到原位条件。此外，在这种情况下，甚至可以忽略当前的TIC。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号