Application of KOH-ethanol Solution in Separation of Waste Photovoltaic Panels

Abstract

With the continuous development of photovoltaic panel technology in recent years, the frequency of replacement has accelerated, which has led to the continuous increase of waste photovoltaic panels. Developing the separation technology of waste photovoltaic panels can effectively solve the problems of resource shortage and environmental pollution. According to the sticking mechanism of EVA film, this paper proposes a KOH-ethanol solution to degrade EVA film and recover silicon from waste photovoltaic panels. In this paper, the key factors affecting the separation of photovoltaic panels are studied through experiments indicating that compared with NaOH-ethanol solution, KOH-ethanol solution has better separation efficiency. Sample after crushing treatment has higher separation efficiency, the best temperature for sample separation is 200 degrees Celsius, and the best sample area is 1×1 square centimeter, the optimal concentration of the solution is 0.20 mol/L, and the optimal reaction time is 3.0 hours.

Keywords

• photovoltaic panels koh-ethanol solution recycling eva film