Catalysis Investigation of PET Depolymerization by Superacid SO42- /γ-Al2O3 under Microwave Irradiation
Solid superacids SO42- /γ-Al2O3 were prepared with wetness impregnation method in different concentrations of sulphuric acid and calcination temperatures. Polyethylene terephthalate (PET, grains) depolymerizations were catalyzed by SO42- /γ-Al2O3 superacids in pure water under microwave irradiation with a reaction time of 150min, a temperature of 190°C and a pressure of 200psi. The results indicated that the catalytic activity of SO42- /γ-Al2O3 superacids was influenced by the calcination temperature, concentration of sulphuric acid and the catalyst dosage. When the superacid SO42- /γ-Al2O3 catalyst was calcined at 600°C, soaked in 2.5 mol·L-1 sulfuric acid solution and the catalyst dosage was 1%, a good catalytic activity appeared.
Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He
Y. S. Ma et al., "Catalysis Investigation of PET Depolymerization by Superacid SO42- /γ-Al2O3 under Microwave Irradiation", Advanced Materials Research, Vols. 233-235, pp. 1073-1075, 2011