Supercapacitive Swing Adsorption Modules and Systems

CBET - 1566201 PI：Landskron，K.气体分离是当今许多工业操作的关键要求，对环境安全、人类健康和能源生产都很重要。例如，碳捕集基本上是从发电厂燃烧天然气或煤产生的氮气中分离二氧化碳，将避免二氧化碳排放到大气中。其他重要的气体分离包括工业用氢气的回收，稀有气体如氙气从空气中的回收，以及关键轻质气体石化产品如丙烷和丙烯的分离。本项目将研究设计一种新型的气体分离技术--超电容变压吸附技术.该项目的方法将使用电容能量来实现气体分离。这种形式的能量具有可以以最小损失回收的优点。因此，与目前使用的方法相比，该技术有望以更低的能耗实现气体分离。气体分离过程的能量效率对于经济可行性非常重要。此外，超级电容变压吸附具有潜在的较低的环境足迹，因为它需要无毒，环保的化学溶剂和碳基材料作为吸附剂。超电容变压吸附具有应用于几种重要工业气体分离的潜力。由于碳捕获和封存的极端重要性，PI在该项目中将重点关注二氧化碳与氮气的分离。与传统的变压和变温吸附工艺相比，超级电容变压吸附提供了一种对目标气体混合物组分完全选择性的方法。在该过程中，吸附剂本身通过电容充电和放电可逆地改变，导致气体吸附行为的变化。形成双电层，并且目标组分被吸附在电极中/电极上。电容性充电和放电是一种可逆的过程，可以以高能量效率操作，因为不使用连续电流，并且气体被吸附类似于物理吸附能量学。将测试超级电容变压吸附模块在二氧化碳与氮气分离中的性能，作为碳捕获的一个例子。模块将允许在连续气流下充电和放电。研究的主要性能参数将是能量效率、所产生气体的纯度、气体吸附能力以及吸附和解吸动力学。为了最大限度地提高能源效率，该团队将设计具有最小内阻的电极。电极的形状和形态将在充电和放电动力学以及气体吸附和解吸动力学方面进行优化。为了最大限度地提高气体吸附能力，PI将使用更高的电压进行实验，探索新的吸附剂材料作为电极，并测试替代电解质。

CBET - 1566201 PI: Landskron, K.Gas separations are a key requirement for many of today's industrial operations and are important for environmental safety, human health, and energy production. For example, carbon capture, which is essentially a separation of carbon dioxide from nitrogen resulting from the combustion of natural gas or coal in a power plant, will avoid emission of carbon dioxide into the atmosphere. Other important gas separations include recovery of hydrogen for industrial use, recovery of noble gases such as xenon from air, and separation of key light gas petrochemicals such as propane and propylene. In this project, a new gas separation technology - Supercapacitive Swing Adsorption - will be researched and designed. The project's approach will use capacitive energy to achieve the gas separation. This form of energy has the advantage that it can be recovered with minimal losses. As a consequence, the technique is promising to achieve gas separations with lower energy consumption compared with currently used methods. The energy efficiency of gas separations processes is very important for economic viability. In addition, Supercapacitive Swing Adsorption has a potential lower environmental footprint since it requires non-toxic, environmentally friendly chemical solvents and carbon-based materials as the adsorbent. Supercapacitive Swing Adsorption has the potential to be applicable to several important industrial gas separations. In this project the PI will focus on the separation of carbon dioxide from nitrogen because of the extreme importance of carbon capture and sequestration.In contrast to conventional pressure and temperature swing adsorption processes, Supercapacitive Swing Adsorption offers an approach for full selectivity towards a targeted gas mixture component. In the process, the sorbent itself is reversibly altered by capacitive charge and discharge leading to a change in gas adsorption behavior. An electric double layer is formed and the targeted component is adsorbed in/on the electrode. Capacitive charge and discharge is a thermodynamically reversible process that can be operated with high energy efficiency, since a continuous current is not used and the gases are adsorbed similar to physisorption energetics. Supercapacitive Swing Adsorption modules will be tested for their performance in the separation of carbon dioxide from nitrogen as an example of carbon capture. The modules will allow for charge and discharge under continuous gas flow. The primary performance parameters of investigation will be energy efficiency, purity of the produced gas, gas adsorption capacity, and adsorption and desorption kinetics. To maximize the energy efficiency, the team will design electrodes with minimal internal resistance. The shape and morphology of the electrodes will be optimized with regard to charge and discharge kinetics as well as gas adsorption and desorption kinetics. To maximize the gas adsorption capacity the PI will perform experiments with increased voltage, explore new sorbent materials as electrodes, and test alternative electrolytes.