Catalytic Hydrolysis of CCl2F2 by Catalyst Al2O3/ZrO2

Dichlorodifluoromethane (CFC-12) is one of the typical compounds currently studied in the problem of Freon, which is responsible for the destruction of the ozone layer and abnormal climate change. Al2O3/ZrO2 solid catalyst was prepared, and the effects of the molar ratio of Al2O3 and ZrO2, calcination temperature, calcination time, and catalyst dosage of the catalyst on the decomposition rate of CFC-12 were studied. The results showed that the best conditions for the preparation of catalyst were as follows: molar ratio of Al2O3 to ZrO2 was 1, calcination temperature was 800 degrees C, calcination time was 2 h, and the amount of catalyst was 1 g. The hydrolysis rate of CFC-12 composite material could reach 98.75%. The characteristics of the catalysts were characterized by XRD, XPS, SEM, EDS, BET, CO2-TPD and NH3-TPD.

Automated summary

In this study, an Al2O3/ZrO2 solid catalyst was prepared to investigate its effect on the decomposition rate of CFC-12. The results showed that the optimal conditions for catalyst preparation were a molar ratio of 1 for Al2O3 to ZrO2, calcination at 800 degrees C for 2 hours, and a catalyst dosage of 1 g. The hydrolysis rate of the CFC-12 composite material reached 98.75%.