Collaborative Research: EPRI/WERF: Collaborative Research: Electrical percolation in flowable electrodes for energy-efficient water re-use applications

合作研究：EPRI/WERF：合作研究：可流动电极中的电渗透用于节能水再利用应用

基本信息

批准号：
1706290
负责人：
Marta Hatzell
金额：
$ 6.92万
依托单位：
Georgia Tech Research Corporation
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-08-15 至 2019-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1706290&HistoricalAwards=false
关键词：
Collaborative Research EPRI WERF Electrical

项目摘要

PI Name: Kelsey Hatzell/Marta HatzellProposal Number: 1706956/1706290 There is a growing need to develop low cost and modular water reuse systems to promote optimal reclamation and treatment of discharged water from industrial, municipal, agricultural and energy generation sites. Targeting strategies that optimize water usage could significantly alleviate stresses at the core of the food-energy-water nexus. The development of new water deionization technologies which can be easily scaled to meet the decentralized demands is imperative for water sustainability. Capacitive deionization is a cost effective and low energy electrochemical approach for treating brackish water streams; however, there are fundamental limitations to this approach because the process is not continuous. In this project a novel flow-electrode-based architecture is examined as a means for both continuous and scalable deionization and energy recovery. The researchers plan to collaborate with local organizations (Georgia Intern Fellowship for Teachers and Vanderbilt School for Science and Math) in order to design an experiential curriculum on brackish water treatment to increase water literacy in the Southeast. The objective of this project is to advance fundamental understanding of the design of flowable electrode architectures for ion removal processes. The PIs plan to study the concept of flow-electrode capacitive deionization (FCDI) for water treatment. FCDI systems have three flow channels, two of which serve to transport suspended activated carbon particles, which remove or electroadsorb ions, and a center channel where the feedwater is directed. To date, few studies have explored the fundamental mechanisms which promote efficient charge transfer and storage within flow electrodes. Specifically, understanding the influence of hydrodynamics within a flowable electrode and its effect on the formation and disruption or percolation networks can potentially increase material utilization and control electrochemical penetration depths. The PIs seek to define a new theoretical framework to describe charging and electron conduction processes at the particle-particle level in order to elucidate idealized operating conditions that promote energy efficient ion removal processes. The PIs will investigate the percolation network of carbon particles in a flow electrode using computational fluid mechanics, advanced in-situ characterization, and bench scale experimentation to obtain new fundamental and applied knowledge regarding this emerging deionization technology. Direct interrogation of the electrical, mechanical and microstructural properties of flowable electrode percolation networks will be obtained through advanced synchrotron-based techniques. The work has the potential to guide the design of a new process for water purification and may have broader relevance for other environmental technologies involving energy storage, energy conversion, and desalination.

PI名称：Kelsey Hatzell/Marta HatzellPropopals编号：1706956/1706290越来越需要开发低成本和模块化水的水域，以促进最佳的填海和从工业，市政，农业，农业和能源生产地点对排放水的处理。针对优化用水量的策略可以大大减轻食品能量 - 水连接的核心压力。可以轻松地扩展以满足分散需求的新水域化技术的开发对于水的可持续性至关重要。电容性去离子是一种具有成本效益和低能电化学方法的方法，用于治疗咸水流。但是，这种方法存在根本的局限性，因为该过程不是连续的。在这个项目中，研究了一种新颖的基于流电极的结构，以作为连续和可扩展性恢复和能量恢复的一种手段。研究人员计划与当地组织（佐治亚州实习奖学金和范德比尔特科学与数学学校实习奖学金）合作，以设计一项关于咸水水处理的体验课程，以提高东南水识字率。该项目的目的是促进对离子去除过程的可流动电极体系结构设计的基本理解。 PIS计划研究水处理流动电容式去离子（FCDI）的概念。 FCDI系统具有三个流通通道，其中两个用于运输悬挂的活性碳颗粒，这些碳颗粒删除或选择性驱动器，以及一个指向水的中心通道。迄今为止，很少有研究探索了促进流量电极内有效的电荷转移和存储的基本机制。具体而言，了解流动电极内流体动力学的影响及其对形成和破坏或渗透网络的影响可能会增加材料利用率并控制电化学渗透深度。 PI试图定义一个新的理论框架，以描述粒子粒子水平的充电和电子传导过程，以阐明理想的工作条件，从而促进节能离子去除过程。 PI将使用计算流体力学，高级原位表征和基准尺度实验研究流量电极中碳颗粒的渗透网络，以获得有关这种新兴脱位技术的新基本知识和应用的知识。将通过基于高级同步加速器的技术获得可流动电极渗透网络的电气，机械和微结构特性的直接询问。这项工作有可能指导设计新的水净化过程，并可能与涉及储能，能量转换和脱盐的其他环境技术具有更广泛的相关性。