SBIR Phase I: Electrochemically-Mediated Highly Selective SO2 Scrubbing

SBIR 第一阶段：电化学介导的高选择性 SO2 洗涤

• 批准号: 2035954
• 负责人: Alexander Reath
• 金额: $ 25万
• 依托单位: VERDOX, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-02-15 至 2021-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2035954&HistoricalAwards=false
• 关键词: SBIR; Phase; Electrochemically; Mediated; Highly

The broader impact of this SBIR Phase I project is through a compact and efficient means of mitigating atmospheric pollution of sulfur dioxide (SO2), a major human health and environmental hazard. Conventional wet scrubbers for SO2 removal are expensive to install and are highly limited by their large footprint, reducing the practicality of their implementation for mobile or space-limited applications. The proposed approach to SO2 capture uses electricity to directly remove the contaminant from a gas stream, providing significant improvements in energy efficiency and eliminating the need for caustic chemicals inherent to conventional SO2 scrubbers. The need for innovative solutions for SO2 removal is highlighted in the maritime shipping industry, where recent legislation on SO2 emissions has created an immediate need for technology that can be retrofitted into existing infrastructure on cargo vessels. This project can potentially be extended to many applications where electrical energy is supplied.The proposed method of SO2 removal uses a technique known as electro-swing adsorption (ESA), which uses a polymer-composite electrode containing an electroactive species that can capture and release a target gas through charge/discharge cycles. This technology has been demonstrated for CO2 capture, but there are significant challenges associated with developing novel chemistry for capture of SO2. Phase I research will focus on gaining a molecular understanding of the electrochemical mechanism of SO2 reactivity. The binding constant for the target gas can be ascertained as a function of the reduction potential of the electroactive species, providing a method of selecting optimized candidates for SO2 capture that are highly reactive and selective over other gases present in exhaust streams, such as CO2. The absorption capacity of the electroactive species will also be assessed using packed-bed absorption columns to simulate an electro-swing adsorption device.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.

SBIR第一期项目的更广泛影响是通过一种紧凑和有效的手段减轻大气中二氧化硫的污染，这是一种主要的人类健康和环境危害。用于去除SO2的传统湿式洗涤器安装成本昂贵，并且由于其占地面积大而受到高度限制，降低了其在移动或空间有限的应用中实施的实用性。所提出的二氧化硫捕获方法使用电力直接从气流中去除污染物，大大提高了能源效率，并且消除了传统二氧化硫洗涤器固有的腐蚀性化学物质的需要。海运业对二氧化硫去除创新解决方案的需求得到了强调，最近关于二氧化硫排放的立法已经产生了对可以改造到现有货船基础设施中的技术的迫切需求。这个项目可以潜在地扩展到许多电力供应的应用。所提出的去除SO2的方法使用一种称为电摆动吸附（ESA）的技术，该技术使用含有电活性物质的聚合物复合电极，该电极可以通过充放电循环捕获和释放目标气体。该技术已被证明用于二氧化碳捕获，但在开发捕获二氧化硫的新化学方面存在重大挑战。第一阶段的研究将集中于对二氧化硫反应的电化学机理的分子理解。目标气体的结合常数可以确定为电活性物质还原电位的函数，从而提供了一种选择SO2捕获的最佳候选物的方法，这些候选物比废气流中存在的其他气体（如CO2）具有高活性和选择性。电活性物质的吸收能力也将使用填充床吸收柱来模拟电摆动吸附装置进行评估。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。