실리콘 태양전지 재자원화를 위한 초임계 CO2 및 헥산을 이용한 구리 및 산화구리 제거기술 개발 = Development of Copper and Copper Oxide Removal Technology Using Supercritical CO2 and Hexane for Silicon Solar Cell Recycling

다국어 초록 (Multilingual Abstract)

Lifetime of Si photovoltaics modules are about 25 years and a large amount of waste modules are expected to be discharged in the near future. Therefore, the extraction and collection of valuable metals out of discharged Si modules will be one of the important technologies. In this study, we demonstrated that supercritical CO2 extraction method can be effectively used to remove Cu, one of the abundant elements in the module, as well as its oxide form, Cu2O. Especially, we proved that the addition of hexane as co-solvent is effective for the removal of both materials. The optimal ratio of CO2 and hexane was 4:1 at a fixed temperature and pressure of 250°C and 250 bar, respectively. In addition, it was proven that the removal of Cu2O was preceded via reduction of Cu2O to Cu.

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