Oxidative liquefaction - approach for complex plastic waste stream conversion
Description
The oxidative liquefaction method was used to get the data shown here. This method has been used to break down the polymer matrix of wind turbine blades (WTB), municipal solid waste (MSW), personal protective equipment (PPE), and photovoltaic panels (PV) and measure the total polymer degradation. In this experiment, the effects of five different parameters, such as reaction temperature, residence time, pressure, waste-to-liquid ratio, and oxidant concentration, on resin degradation were studied in detail. Experiments were performed in the temperature range of 250°C to 350°C with a residence time of 30 to 90 minutes, at a pressure of 20 to 40 bar, a waste-to-liquid ratio of 5-25%, and oxidant concentrations of 15-45% by weight.
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Steps to reproduce
To the tests the Parr reactor series 4650, produced by Parr Instruments based in Illinois, USA was applied (with a total capacity of 500 mL, and heating spiral). The regulation of reactor temperature by the Parr 4838 reactor controller. During test into the reactor the nitrogen was introduction as an inert gas. Depending on the waste material, the oxidative liquefaction process was conducted at temperatures between 250 and 350 °C for WTB and between 200 and 300°C for PPE, MSW, and PV. The conditions parameters under which the experiments were conducted were prepared using the DOE experiment planning method. According to published studies, these alterations were caused by the material's strength. For the other process variables, the differences are also related to the type of material, and so for WTB the amount of 40% H2O2 addition ranged from 15 to 45% and for the other samples from 30 to 60%. For initial pressure and process time in the case of WTB, these parameters varied between 30-40 bar and 30-90 min, respectively, while for PPE, MSW, and PV they were already constant at 30 bar and 45 min for initial pressure, and process time, respectively.
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Funding
Narodowe Centrum Nauki
2021/41/B/ ST8/01770