| 초록 |
With the growing use of lithium nickel manganese cobalt oxide (NCM) batteries, the high recovery of cathode materials is required for sustainable battery recycling under the limited metal source and to minimize environmental impacts from battery disposal. In the recycling process, acid leaching is a critical step for selective metal extraction. However, excessive use of chemicals including acid, base degrade the economic performance of the recycling process. Hence, in this study, we proposed and simulated the novel lithium-ion battery recycling system using SOx utilization of industrial flue gas as the following process: sulfuric acid regeneration from SOx, acid leaching of the cathode material, selective precipitation. The catalytic conversion from the SO2 to SO3 and the absorption process are employed for each flue gas desulfurization and the H2SO4 production which are used as the leaching reagent. We expected that utilizing industrial flue gas could simultaneously save the operating cost of the flue gas cleaning and acid consumption of the battery recycling process.Keywords: Spent lithium-ion batteries, SOx recycling, valuable metals |
