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

该创新-技术转化伙伴关系（PFI-TT）项目的更广泛影响/商业潜力是生产用于填充材料和建筑材料的新产品。该技术使排放二氧化碳和生产碱性工业残留物的行业能够捕获并将其排放物转化为商业上有用的稳定产品。该项目将用工程产品取代碳酸盐材料的开采，满足对绿色建筑材料日益增长的需求。该项目将开发一种创新的低温方法，将捕获的二氧化碳排放转化为具有规则粒度分布的碳酸钙和碳酸镁。目前，在工业中没有通过具有规则孔径分布的固体碳酸盐形成来整合CO2捕集和再生的方法。所提出的技术是一种节能的替代传统的热驱动的能源密集型研磨方法。该项目将通过利用甘氨酸钠等可再生溶剂来应对与二氧化碳低溶解度相关的挑战。作为溶剂热再生的替代方案，使用与CO2反应以产生无机碳酸盐并再生溶剂的含钙和镁的材料化学再生负载CO2的溶剂。在50-75 °C下通过固体碳酸盐形成的溶剂的化学再生与在90 °C以上发生的溶剂的常规热再生相比显著更低。碳酸钙和碳酸镁具有良好的有序的粒度分布，实现了使用湍流涡在泰勒-库埃特反应器定制这些研究。该研究将推进反应堆工程的基本方面，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NSF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。

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.