Reliable production of isopropyl alcohol from air carbon dioxide Andrea Facchin , Federica Zimbardi, Getachew Abrha Gebrehiwet, Cristian Torri University of Bologna, Italy Climate crisis has driven our society and economy towards the research of new sources of power. Solar energy is, among the others, the renewable resource which has been rapidly developed and applied all over the globe [1] . However, its energy production is strongly dependent on the light time duration and light intensity. Moreover, despite energy production, our society seeks chemicals and fuels for which we are still strongly dependent on fossil oil. To meet the needs mentioned above, our team developed a system, based on biological conversion, able to perform direct air capture (DAC) of CO 2 through commercial resins [2] and combine it with on-demand hydrogen from water hydrolysis, to produce acetate which is further chemically converted into isopropanol. The technology, which has been recently filed for patent, provides a synergic combination of DAC and fixation of CO 2 utilizing the properties of microbial mixed cultures which, while producing up to 70 g L -1 acetate solution, are able to reduce the energy consumption for the carbon dioxide recovery from the DAC resins. Later, the acetate is converted via chemical upgrade to acetone and isopropanol by respectively ketonization and later hydrogenation. The result is a process which can be applied to reduce the CO 2 levels in indoor contests with minimal energy costs, providing different renewable building blocks chemicals and fuels. References 1. Q. Hassan et al. , «A comprehensive review of international renewable energy growth», Energy Built Environ. , gen. 2024, doi: 10.1016/j.enbenv.2023.12.002. 2. H. Shokrollahzadeh Behbahani e M. D. Green, «Polymers in direct air capture: a mini review», Polym. Int. , vol. n/a, fasc. n/a, doi: 10.1002/pi.6781
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