The char obtained at higher temperatures display higher volatilisation and carbonisation. The enhanced SBET values for the char and its pore volume were collected, ~24 m2 g−1 and ~0.08 cm3 g−1, respectively. Optimised temperature for maximum char yields was recorded. Additionally, as the heating rate decreased, as well as longer isothermal residence time, the char yields were increased. This process relied heavily on the process parameters, especially pyrolytic temperature. The results showed that the amount of yielded char was inversely proportional to the temperature. Enhanced surface area and porosity value of PP-IG derived char were obtained via an optimised slow pyrolysis approach. A batch reactor with a horizontal furnace was used to mediate the thermal decomposition of PP-IG.

This study applied pyrolysis with different low pyrolytic temperatures to convert disinfected PP-based isolation gown waste (PP-IG) into an optimised amount of char yields. Yields of carbonaceous char with a high surface area were enhanced by decreasing the temperature to improve the conversion of hazardous plastic polypropylene (PP), the major component in abundantly used isolation gowns.

Bamboo in the paper