3D printing of reactive porous media to enhance understanding of porosity-permeability evolution

活性多孔介质的 3D 打印可增强对孔隙度-渗透率演变的理解

• 批准号: 2025626
• 负责人: Lauren Beckingham
• 金额: $ 33.18万
• 依托单位: Auburn University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2025626&HistoricalAwards=false
• 关键词: 3D; printing; reactive; porous; media

Geochemical reactions play an important role in natural and engineered systems, occurring as part of natural weathering processes, at contaminated subsurface and surface sites, and in geologic CO2 sequestration, radioactive waste disposal, and other engineered subsurface systems. Understanding the impact of these reactions on flow and transport is critical to assessing long-term evolution of these systems, including risks and adverse environmental impacts. However, current understanding of the impact of mineral dissolution and precipitation reactions on porous media properties is limited. These systems are difficult to evaluate with laboratory experiments because natural samples are highly heterogenous and different results can be obtained for even replicate experiments with samples from the same location. In this work, the use of 3D printing to create replicable, reactive porous media samples will be explored and used to enhance understanding of reactions and permeability evolution in porous media. Observations will be leveraged to generate new porosity-permeability relationships with improved predictive capabilities. Advancements in understanding from this work will generate knowledge needed to improve engineering design of subsurface energy systems, enhance understanding of contaminant fate and transport in subsurface systems, and improve understanding of near surface weathering processes. This work will encompass a range of broader impacts ranging from K-12 outreach, graduate student education, and enhancing diversity in STEM students in addition to increasing understanding of transport and reactions in natural systems. Undergraduate and graduate students from underrepresented groups will be recruited for this project and included in outreach activities aimed to enhance interest and diversity in STEM fields.The goal of this work is to enhance understanding of mineral dissolution and precipitation reactions and impacts on porosity and permeability in porous media. The highly heterogenous nature of porous media complicates experimental efforts and limits predictive capabilities. Critically, this proposal will utilize 3D printing to fabricate replicate reactive porous media that maintain the physical heterogeneities of real porous media to enhance understanding of the impact of variations in porous media structures and the distribution of mineral reactions on where mineral reactions occur and, consequently, changes in porosity and permeability. The approach will be to create a series of 3D printed “reactive” porous media and carry out replicate laboratory mineral dissolution and precipitation experiments on these samples, characterizing permeability evolution and using 3D imaging to identify the time lapsed evolution of porosity. Experimental observations will be leveraged to develop new macroscopic porosity-permeability relationships with improved predictive capabilities.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地球化学反应在自然和工程系统中发挥着重要作用，作为自然风化过程的一部分，发生在受污染的地下和地表场所，以及地质CO2封存，放射性废物处理和其他工程地下系统中。了解这些反应对流动和运输的影响对于评估这些系统的长期演变至关重要，包括风险和不利的环境影响。然而，目前对矿物溶解和沉淀反应对多孔介质性质的影响的了解是有限的。这些系统很难用实验室实验来评估，因为天然样品是高度异质性的，即使用同一地点的样品进行重复实验，也可能得到不同的结果。在这项工作中，将探索使用3D打印来创建可复制的反应性多孔介质样品，并用于增强对多孔介质中反应和渗透率演变的理解。将利用观测结果生成新的孔隙度-渗透率关系，提高预测能力。从这项工作中获得的理解进步将产生改进地下能量系统工程设计所需的知识，增强对地下系统中污染物命运和运输的理解，并提高对近地表风化过程的理解。这项工作将包括一系列更广泛的影响，从K-12推广，研究生教育，提高STEM学生的多样性，以及增加对自然系统中运输和反应的理解。本项目将招募来自代表性不足群体的本科生和研究生，并将其纳入旨在提高STEM领域兴趣和多样性的外展活动。这项工作的目的是加强对多孔介质中矿物溶解和沉淀反应及其对孔隙度和渗透率的影响的认识。多孔介质的高度非均质性使实验工作复杂化，并限制了预测能力。关键的是，该提案将利用3D打印来制造复制反应性多孔介质，以保持真实多孔介质的物理非均质性，以增强对多孔介质结构变化和矿物反应分布对矿物反应发生位置的影响的理解，从而提高孔隙度和渗透率的变化。该方法将创建一系列3D打印的“反应性”多孔介质，并在这些样品上进行复制的实验室矿物溶解和沉淀实验，表征渗透率的演变，并使用3D成像来识别孔隙度的随时间变化。将利用实验观测来开发新的宏观孔隙度-渗透率关系，提高预测能力。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Resin based 3D printing for fabricating reactive porous media

用于制造反应性多孔介质的树脂基 3D 打印

• DOI: 10.1016/j.matlet.2022.132469
• 发表时间: 2022
• 期刊: Materials Letters
• 影响因子: 3
• 作者: Fahim Salek, Md;Shinde, Vinita V.;Beckingham, Bryan S.;Beckingham, Lauren E.
• 通讯作者: Beckingham, Lauren E.

Material Design for Enhancing Properties of 3D Printed Polymer Composites for Target Applications

• DOI: 10.3390/technologies10020045
• 发表时间: 2022-03
• 期刊: Technologies
• 影响因子: 3.6
• 作者: Vinita V. Shinde;Yuyang Wang;M. Salek;M. Auad;L. Beckingham;B. Beckingham