Releasing and Capturing carbon dioxide CO2 using Morpholine and Photo acid Solutions

Osamah Alghazwat; Adnan Elgattar; Yi liao

Florida institute of technology

Carbon dioxide is a primary greenhouse gas that contributes significantly to global warming and climate change. Various methods have been proposed to capture and convert CO₂ into useful products, but most of them have several challenges. In contrast, photoacids have emerged as a promising alternative for releasing CO₂ because they have the potential to drive a photoinduced proton-coupled electron transfer reaction that can produce CO₂.In this work, we designed and synthesized an indazole photoacid mPAH with high water solubility to release CO₂ from Morpholine salt. The reaction was monitored over time using proton nuclear magnetic resonance (NMR) spectroscopy, and the results showed that the release of CO₂was successfully achieved under irradiation with UV light in the presence of a photoacid. The magnitude of pH is 1.9–2 units with maximum pH change occurring after 15mins of the irradiation with 470nm.The efficiency of CO₂ release was found to be dependent on the concentration of the photoacid and irradiation time. The mechanism of the reaction was proposed to involve the photoacid-mediated protonation of morpholine salt followed by decarboxylation to release CO₂. The process of capturing and releasing CO₂ using morpholine is an efficient and cost-effective method for reducing greenhouse gas emissions from industrial processes. This study provides a promising method for the controlled release of CO₂ from morpholine salt using photoacids, which has potential applications in carbon capture and storage technologies. Further research is needed to explore the potential of photoacid-based technologies for carbon capture and storage in different industrial applications. However, the results of this study provide a promising foundation for future research in this emerging field.