(173a) CO2 Adsorption and Utilization Using Silica Based Aerogel in Factory Chimney Environments.

The current rise in atmospheric carbon dioxide (CO₂) levels is a serious global concern, primarily linked to the phenomenon of global warming. It stems largely from the combustion of fossil fuels and deforestation, leading to significant climate change worldwide. Global warming triggers events such as rising sea levels, melting glaciers and ice caps in polar and mountainous regions, and increased frequency of extreme weather events, posing serious threats to human health, safety, and the economy. Moreover, CO₂ remains in the atmosphere for long periods, meaning today's emissions affect future generations. Hence, efforts to reduce carbon emissions and promote alternative energy sources and sustainable industries are imperative.
Currently, significant efforts are being made to reduce and eliminate carbon dioxide emissions through ongoing research, with a particular focus on utilizing porous supports. Studies are investigating various methods, including impregnation and chemical grafting, to enhance the adsorption and utilization of carbon dioxide. Porous supports must withstand diverse environmental conditions, and research is underway to ensure their recyclability and other factors.

We have conducted research on utilizing a silica-based aerogel supported with PVP, which we developed, to capture CO₂ emissions from factory chimneys, one of the sources of carbon dioxide emissions. Employing a physical impregnation technique, we ensured that the aerogel could effectively adsorb CO₂ even at high temperatures while maintaining good recyclability. Additionally, to utilize captured CO₂, we introduced Zn²⁺ to facilitate the cycloaddition reaction of propylene oxide, an epoxide compound, within the aerogel support. This process aims to synthesize propylene carbonate as the product.