Equivalence of difluorodichloromethane (CFC-12) hydrolysis catalyzed by solid acid(base) MoO(3)(MgO)/ZrO(2)

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%.