Base- or acid-assisted polystyrene plastic degradation in supercritical CO₂.

ABSTRACT: Plastic has caused serious "white pollution" to the environment, and the highly inert characteristics of plastic bring a major challenge for degradation. Supercritical fluids have unique physical properties and have been widely used in various fields. In this work, supercritical CO₂ (Sc-CO₂) with mild conditions was selected and assisted by NaOH/HCl solution to degrade polystyrene (PS) plastic, and the reaction model was designed using response surface methodology (RSM). It was found that, regardless of the types of assistance solutions, the factors affecting PS degradation efficiencies were reaction temperature, reaction time, and NaOH/HCl concentration. At the temperature of 400 °C, time of 120 min, and base/acid concentration of 5% (in weight), 0.15 g PS produced 1

SUBMITTER: Liu Y 

PROVIDER: S-EPMC10023313 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature