Catalytic depolymerization of waste polyethylene terephthalate plastic in supercritical ethanol by ZnO/γ-Al2O3 catalyst

Chemical recycling of polyester textile wastes: shifting towards sustainability

“…148,149 Thus, Lozano-Martinez and co-workers obtained about 94% PET degradation in 30 min at 275 °C/40 bar, and more recently, the effect of adding metal-based catalyst in the process was studied by Yang et al (92% of degradation within 60 min at 270 °C/8 MPa with ZnO/Al 2 O 3 ). 150…”

Comparsion of Catalyst Effectiveness in Different Chemical Depolymerization Methods of Poly(ethylene terephthalate)

“…Under these process conditions, PET was practically completely depolymerized and the main product of the reaction, apart from ethylene glycol and ethanol, was diethyl terephthalate. Later studies included the addition of catalysts, such as metal oxides [89,90] and ionic liquids [91,92]. As the research has shown, the addition of catalysts to the PET ethanolysis process does not have a major impact on the conversion rates, but conclusively shortens the reaction time.…”

The Effect of Laser Power and Laser Exposure Time for Cavity Created on Al2O3 Ceramic Surface

“…Moreover, laser texturing of zirconia-alumina ceramics has been recognized as a promising surface modification method for various applications, such as enhancing osseointegration of dental implants and improving friction behavior of hip replacement bearing components [38]. The potential practical application of alumina-substrate composites as efficient laser-driven color converters in high-brightness projection displays has also been highlighted [39]. Additionally, laser surface engineering of alumina ceramics has been recognized as an area of technological importance for various applications, with a focus on the effect of laser radiation on the mechanical and physical properties of alumina ceramics [40].…”