多孔介质中以超临界流体为载体的沉积过程动力学及其控制方法

项目名称： 多孔介质中以超临界流体为载体的沉积过程动力学及其控制方法

项目编号： No.20876123

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 生物科学

项目作者： 刘永忠

作者单位： 西安交通大学

项目金额： 22万元

中文摘要： 以多孔介质中超临界流体为载体的物理/化学沉积过程为研究对象，采用介观尺度和孔尺度相结合的数学模拟方法，研究多孔介质中沉积过程的动力学机理及其控制方法。在孔尺度下，研究沉积过程中传递－反应－界面沉积与多孔介质孔隙微观结构特性演化的耦合作用机制，获得关联介观过程参数所需的沉积位置、影响区域和孔隙形态的演变规律；在介观尺度下，以微观过程的动力学控制参数变化特性为基础，研究过程参数对沉积过程中多孔介质孔隙结构形态演变过程影响的规律，目的在于掌握不同孔隙特性多孔介质中以超临界流体为载体的沉积过程与多孔介质孔隙结构演化的耦合作用机制，揭示多孔介质中以超临界流体为载体的沉积动力学过程机理，并探索多孔介质孔结构形态演变的动力学控制方法。该项目的研究将有助于深入理解在超临界流体流动条件下多孔介质中物理/化学沉积过程机理及其控制方法，深化超临界流体应用的基础理论和分析方法。

中文关键词： 多孔介质；超临界流体；沉积动力学；数学模型；调控方法

英文摘要： Regarding physical/chemical deposition when supercritical fluid (SCF) flows in porous media, mathematical modeling approaches in which mesoscale methods incorporate with pore scale simulations are employed to explore the dynamics and relevant controlling methods during deposition process. The evolutions of micro-structural characteristics of porous media coupling with the effects of transport-reaction-interfacial deposition during the processes will be investigated at pore scale to achieve the understandings on the evolutions of deposition position, impact region and morphological variation of pores in porous media. On the basis of the controlling dynamic parameters obtained at the pore scale, the effects of process parameters on the evolutions of morphological variation of pores will be also investigated at mesoscale to understand behaviors of porous structural variation coupling with deposition process in porous media with different micro-structural features when SCF acts as a carrier for deposition. This project aims at revealing the mechanism of deposition process dynamics when SCF acts as a carrier and flows into porous media, and exploring the approaches to control evolutions of porous structure. It will shed light on deep understanding of the mechanisms and relevant control methods of physical/chemical deposition when SCF flows inside porous media. The achievement of this project will extend the fundamentals of SCF and the relevant analysis approaches in the applications of SCF process in practice.

英文关键词： porous media; SCF; deposition dynamics; mathematical modeling; control method