Harussani M M, Rashid Umer, Sapuan S M, Abdan Khalina
Advanced Engineering Materials and Composites Research Centre (AEMC), Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia.
Institute of Nanoscience and Nanotechnology (ION2), Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia.
Polymers (Basel). 2021 Nov 17;13(22):3980. doi: 10.3390/polym13223980.
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. 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. A batch reactor with a horizontal furnace was used to mediate the thermal decomposition of PP-IG. Enhanced surface area and porosity value of PP-IG derived char were obtained via an optimised slow pyrolysis approach. The results showed that the amount of yielded char was inversely proportional to the temperature. This process relied heavily on the process parameters, especially pyrolytic temperature. Additionally, as the heating rate decreased, as well as longer isothermal residence time, the char yields were increased. Optimised temperature for maximum char yields was recorded. The enhanced SBET values for the char and its pore volume were collected, ~24 m g and ~0.08 cm g, respectively. The char obtained at higher temperatures display higher volatilisation and carbonisation. These findings are beneficial for the utilisation of this pyrolysis model in plastic waste management and conversion of PP-IG waste into char for further activated carbon and fuel briquettes applications, with the enhanced char yields, amidst the COVID-19 pandemic.
通过降低温度来提高高表面积碳质焦炭的产量，以促进危险塑料聚丙烯（PP）的转化，PP是大量使用的隔离服的主要成分。本研究采用不同的低温热解方法，将消毒后的PP基隔离服废料（PP-IG）转化为优化量的焦炭产量。使用带有卧式炉的间歇式反应器来介导PP-IG的热分解。通过优化的慢速热解方法获得了PP-IG衍生焦炭的增强表面积和孔隙率值。结果表明，产生的焦炭量与温度成反比。该过程严重依赖于工艺参数，尤其是热解温度。此外，随着加热速率降低以及等温停留时间延长，焦炭产量增加。记录了获得最大焦炭产量的优化温度。收集到焦炭的增强SBET值及其孔体积，分别约为24 m²/g和0.08 cm³/g。在较高温度下获得的焦炭显示出更高的挥发和碳化。这些发现有利于在塑料废物管理中利用这种热解模型，并将PP-IG废物转化为焦炭，以进一步用于活性炭和燃料型煤应用，在COVID-19大流行期间提高焦炭产量。
