Magnetic Resonance Studies of supercritical fluids in porous media

多孔介质中超临界流体的磁共振研究

• 批准号: 1335534
• 负责人: Sarah Codd
• 金额: $ 30.65万
• 依托单位: Montana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1335534&HistoricalAwards=false
• 关键词: Magnetic; Resonance; Studies; supercritical; fluids

1335534 PI: CoddMagnetic Resonance (MR) techniques will be used to study flows and diffusion characteristics of both pure supercritical fluids (C2F6 and CO2) and a two-phase mixture of brine and supercritical CO2 in capillaries and in porous media. The study will proceed from relatively simple flows in capillaries to more complex ones, involving fingering instability and buoyancy-driven flows of brine-supercritical CO2 mixtures in porous media. Results will be used to determine behavior near critical points in these systems and to establish the validity of a theory. Storage of CO2 in a supercritical state in earth formations (porous media) is currently being proposed as means to reduce CO2 in the atmosphere. Carbon sequestration requires the storage of CO2 in its supercritical state in contact with subsurface brines. Supercritical fluids are also used as green solvents in industrial processes such as decaffeination and enhanced oil recovery. The results of the present study will be useful in assessing the risks and in designing safer carbon sequestration and industrial processes that use supercritical fluids.

1335534 PI：CODDMAGNETIC共振（MR）技术将用于研究纯超临界流体（C2F6和CO2）的流量和扩散特性，以及在帽子和多孔媒体中的盐水和超临界CO2的两相混合物。这项研究将从毛细血管中的相对简单流到更复杂的流动进行，涉及多孔介质中盐水渗透二氧化碳混合物的指法不稳定性和浮力驱动的流动。结果将用于确定这些系统中关键点附近的行为，并确定理论的有效性。目前正在提出将CO2存储在地球地层中的超临界状态（多孔介质），以减少大气中的二氧化碳的手段。碳固存需要与地下盐水接触的超临界状态的二氧化碳储存。超临界流体还用作工业过程中的绿色溶剂，例如脱咖啡因和增强的石油回收率。本研究的结果将有助于评估使用超临界流体的风险和设计更安全的碳固存和工业过程。