PFI-TT: Novel Vortex-Flow Driven Process for Producing Calcium and Magnesium Carbonates Using Anthropogenic CO2

PFI-TT：利用人为二氧化碳生产碳酸钙和碳酸镁的新型涡流驱动工艺

• 批准号: 2141091
• 负责人: Greeshma Gadikota
• 金额: $ 25万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-02-01 至 2025-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2141091&HistoricalAwards=false
• 关键词: PFI; TT; Novel; Vortex; Flow

The broader impact/commercial potential of this Partnerships for Innovation - Technology Translation (PFI-TT) project is to produce new products for filler materials and in construction materials. The proposed technology enables industries emitting CO2 and producing alkaline industrial residues to capture and convert their emissions into commercially useful and stable products. It will replace the mining of carbonate materials with engineered products, meeting the growing demand for green construction materials.The proposed project will lead to the development of an innovative low-temperature approach to convert captured CO2 emissions into calcium and magnesium carbonates with regular particle size distributions. Currently there is no process in industry that integrates CO2 capture and regeneration via solid carbonate formation with regular pore size distributions. The proposed technology is an energy-efficient alternative to conventional thermally driven energy-intensive grinding approaches. The project will address challenges associated with the low solubility of CO2 by harnessing regenerable solvents, such as sodium glycinate. As an alternative to thermal regeneration of solvents, the CO2-loaded solvents are chemically regenerated using calcium and magnesium bearing materials that react with CO2 to produce inorganic carbonates and regenerate the solvents. The chemical regeneration of solvents at 50-75 °C via solid carbonate formation is significantly lower compared to conventional thermal regeneration of solvents which occurs above 90 °C. Calcium and magnesium carbonates with well-ordered particle size distributions are realized using turbulent vortices in a Taylor-Couette reactor customized for these studies. The research will advance fundamental aspects of reactor engineering, tuning of multiphase chemical interactions, and practical challenges of scalable implementation.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.

创新技术转化伙伴关系（PFI-TT）项目的更广泛影响/商业潜力是生产填充材料和建筑材料的新产品。拟议的技术使排放二氧化碳和产生碱性工业残留物的工业能够捕获并将其排放转化为商业上有用和稳定的产品。它将用工程产品取代碳酸盐材料的开采，满足人们对绿色建筑材料日益增长的需求。拟议中的项目将导致一种创新的低温方法的发展，将捕获的二氧化碳排放转化为具有规则粒径分布的碳酸钙和碳酸镁。目前，工业上还没有通过具有规则孔径分布的固体碳酸盐地层将二氧化碳捕获和再生结合起来的工艺。所提出的技术是传统热驱动的能源密集型磨削方法的节能替代方案。该项目将通过利用可再生溶剂，如甘氨酸钠，解决与二氧化碳溶解度低相关的挑战。作为溶剂热再生的一种替代方法，使用含钙和镁的材料对含二氧化碳的溶剂进行化学再生，这些材料与二氧化碳反应生成无机碳酸盐并再生溶剂。在50-75°C时，通过固体碳酸盐形成的溶剂的化学再生比在90°C以上进行的常规溶剂热再生要低得多。在为这些研究定制的Taylor-Couette反应器中使用湍流涡实现了具有有序粒径分布的碳酸钙和碳酸镁。该研究将推进反应器工程的基本方面，多相化学相互作用的调整，以及可扩展实施的实际挑战。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。