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https://hku.zoom.us/j/94521050228?pwd=RV17sWh1SfQAbqxuu0Wyz4KccV8Cxq.1

Meeting ID: 945 2105 0228

Password: 346333

Abstract:

The escalating greenhouse effect and increasing extreme weather events underscore the urgent need to reduce CO2 emissions and enhance capture technologies. Innovative approaches, such as CO2 gas batteries and electrochemical conversion of CO2 into valuable byproducts, hinge on optimizing efficiency and yields. A key factor in these advancements is understanding how CO2 dissolves in aqueous solutions, transforming into carbonate (CO32-) and bicarbonate (HCO3-) ions—a process marked by dynamic equilibria and detection challenges.

This discussion explores analytical techniques for studying dissolved CO2 and its ions, ranging from traditional methods like total carbon measurement and equilibrium analysis to advanced in situ tools such as FTIR and Raman spectroscopy. These methods reveal the journey of CO2 from gas-liquid interfaces to full solution integration, offering precise insights into carbon species distribution and concentration. Each technique’s strengths, limitations, and applications are assessed, particularly in understanding CO2 ionization kinetics and equilibria. Recent detection improvements also enable a novel battery technology that leverages CO2 absorption and waste heat for power generation. This overview highlights the critical role of precise monitoring in advancing CO2 utilization technologies and suggests directions for future research.

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