研究目的
Investigating the influence of fragment size on the time and temperature of ethylene vinyl acetate lamination decomposition in the photovoltaic module recycling process.
研究成果
The study concluded that increasing the temperature to at least 500°C is necessary for thermal decomposition of EVA in PV modules. Smaller fragment sizes, particularly powder, showed higher decomposition efficiency at lower temperatures, suggesting potential energy savings. However, the cost of milling must be considered. The optimal process suggested is using 3 × 3 cm pieces at 600°C for 1 h, balancing energy input and processing efficiency.
研究不足
The study focused on thermal decomposition in air, potentially overlooking other decomposition methods or atmospheres. The economic feasibility of milling to powder size for energy savings was noted but not deeply analyzed.
1：Experimental Design and Method Selection:
The study involved thermal treatment of EVA foil and PV module pieces at different temperatures (300–800°C) for varying durations (1 h, 3 h, 5 h) to assess the effect of fragment size on decomposition.
2：Sample Selection and Data Sources:
Samples included pure EVA film and EVA laminated PV module pieces of different sizes (5 cm × 5 cm, 3 cm × 3 cm, 1 cm × 1 cm, and powder <250 μm).
3：List of Experimental Equipment and Materials:
Equipment used included a horizontal pipe furnace (PTF 12/105/500, Protherm), DSC (Q20 DSC, TA Instrument), and a planetary mill (Retsch PM100).
4：0). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Samples were heated in air at a rate of 10°C/min, and weight loss was recorded post-treatment.
5：Data Analysis Methods:
The degree of decomposition was assessed based on weight loss, and DSC was used to analyze thermal properties of EVA samples.
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