Equivalence of difluorodichloromethane (CFC-12) hydrolysis catalyzed by solid acid(base) MoO(MgO)/ZrO

• Published in: RSC advances 2020-09, Vol.1 (56), p.33662-33674
• Main Authors: Li, Zhiqian, Tan, Xiaofang, Ren, Guoqin, Chang, Yu, Jia, Lijuan, Duan, Kaijiao, Liu, Tiancheng
• Format: Article
• Language: English
• ISSN: 2046-2069
• DOI: 10.1039/d0ra05947a

In this paper, a solid acid(base) MoO 3 (MgO)/ZrO 2 was prepared for the catalytic hydrolysis of difluorodichloromethane (CFC-12). The effects of the catalyst preparation method, calcination temperature, and hydrolysis temperature on the conversion rate of CFC-12 were studied. The catalysts were characterized by XRD, N 2 isotherm adsorption desorption, NH 3 -TPD, and CO 2 -TPD. Meanwhile, the equivalence of the catalytic activity of MoO 3 (MgO)/ZrO 2 for CFC-12 was studied. Research shows that the solid acid MoO 3 /ZrO 2 and solid base MgO/ZrO 2 catalyzed hydrolysis of CFC-12 is equivalent; the solid acid MoO 3 /ZrO 2 is calcined at 600 °C for 3 h and the solid base MgO/ZrO 2 is calcined at 600 °C for 6 h (co-precipitation) and 700 °C for 6 h (impregnated) at a catalytic hydrolysis temperature of 300-400 °C and CFC-12 concentration of 4%. The catalytic hydrolysis products obtained were CO, HCl, and HF, and the CFC-12 conversion rate almost reached 100%. In this paper, a solid acid(base) MoO 3 (MgO)/ZrO 2 was prepared for the catalytic hydrolysis of difluorodichloromethane (CFC-12).