CO₂ capture enhancement of different zeolites through the utilization of valuable cathode metals from spent...

Due to their exceptional properties, lithium-ion batteries are widely utilized in electronic devices and electric vehicles. However, their extensive use has highlighted the need for environmentally sustainable recycling methods. This study proposes a novel approach by using metals from spent lithium-ion batteries to modify CO₂ capture abilities of different zeolite types, thereby contributing to the global progress towards achieving net zero emissions. The leach liquor was obtained by leaching metals from the batteries using a mixture of H₂SO₄ and H₂O₂. The study investigated the effect of ion concentrations on CO₂ adsorption, including both breakthrough and full capacity. While no significant improvement in CO₂ capture was observed for most zeolites, zeolite A showed enhanced breakthrough capacity after ion exchange. The breakthrough curve for zeolite A, with data points below 10 % breakthrough, was effectively modelled using the Bohart-Adams model. The results demonstrated the potential of zeolites, especially zeolite LTA, in both recycling metals from lithium-ion batteries and enhancing CO₂ adsorption capacity.