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polymersArticleLow-Temperature ��-Tocopherol Tyrosinase Thermal Degradation of Disinfected COVID-19 Non-Woven Polypropylene–Based Isolation Gown Wastes into Carbonaceous CharM. M. Harussani 1 , Umer Rashid 2, , S. M. Sapuan 1,three, and Khalina AbdanAdvanced Engineering Materials and Composites Investigation Centre (AEMC), Division of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; [email protected] Institute of Nanoscience and Nanotechnology (ION2), Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia Laboratory of Biocomposite Technologies, Institute of Tropical Forestry and Forest Goods, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; [email protected] Correspondence: [email protected] (U.R.); [email protected] (S.M.S.)Citation: Harussani, M.M.; Rashid, U.; Sapuan, S.M.; Abdan, K. Low-Temperature Thermal Degradation of Disinfected COVID-19 Non-Woven Polypropylene–Based Isolation Gown Wastes into Carbonaceous Char. Polymers 2021, 13, 3980. https://doi.org/10.3390/ polym13223980 Academic Editor: Serge Bourbigot Received: 24 September 2021 Accepted: 20 October 2021 Published: 17 NovemberAbstract: Yields of carbonaceous char using a higher surface area had been enhanced by decreasing the temperature to enhance the conversion of hazardous plastic polypropylene (PP), the main component in abundantly utilized isolation gowns. This study applied pyrolysis with distinctive low pyrolytic temperatures to convert disinfected PP-based isolation gown waste (PP-IG) into an Ruboxistaurin Epigenetics optimised quantity of char yields. A batch reactor using a horizontal furnace was used to mediate the thermal decomposition of PP-IG. Enhanced surface region and porosity value of PP-IG derived char had been obtained via an optimised slow pyrolysis approach. The outcomes showed that the quantity of yielded char was inversely proportional towards the temperature. This procedure relied heavily around the method parameters, especially pyrolytic temperature. Furthermore, because the heating rate decreased, at the same time as longer isothermal residence time, the char yields were elevated. Optimised temperature for maximum char yields was recorded. The enhanced SBET values for the char and its pore volume had been collected, 24 m2 g-1 and 0.08 cm3 g-1 , respectively. The char obtained at larger temperatures show higher volatilisation and carbonisation. These findings are helpful 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, together with the enhanced char yields, amidst the COVID-19 pandemic. Keywords: slow pyrolysis; COVID-19 isolation gown; polypropylene; char; pyrolysis parameters1. Introduction Serious acute respiratory syndrome coronavirus (SARS-CoV-2 or COVID-19 virus) pandemic attacked the planet vigorously from the fourth quarter of 2019 until the present. As a result, the Globe Wellness Organization (WHO) [1] announced a public wellness emergency resulting from the outbreak on 30 January 2020. As reported on 7 February 2021, there have been 106 million active COVID-19 instances, with 2.3 million deaths calculated from 219 countries and regions affected by the global outbreak [2]. Environmental pollution is among the most worrying consequences resulting from this COVID-19 epidemic. As of 22 November 2020, a enormous level of COVID-19 medical waste (C.