The Hydrolyzation and Hydrolysis Rates of Chlorodifluoromethane during Catalytic Hydrolysis over Solid Acid (Base) MoO<sub>3</sub>(MgO)/ZrO<sub>2</sub> Catalyst
Xiaofang Tan,
Junhao Mao,
Guoqing Ren,
Yu Chang,
Lijuan Jia,
Tiancheng Liu
Affiliations
Xiaofang Tan
School of Chemistry & Environment, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Junhao Mao
School of Chemistry & Environment, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Guoqing Ren
School of Chemistry & Environment, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Yu Chang
Yunnan Technician College, Kunming 650300, China
Lijuan Jia
School of Chemistry & Environment, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Tiancheng Liu
School of Chemistry & Environment, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Chlorodifluoromethane (HCFC-22) is one of the air pollutants that destroy the ozone layer and warm the earth. In order to degrade HCFC-22, the catalytic hydrolysis method is currently the most effective environmental technology. Herein, we prepare solid acid MoO3/ZrO2 and solid base MgO/ZrO2 catalysts for the degradation of HCFC-22, with a particular focus on revealing the effects of the catalyst preparation methods, calcination temperatures, and hydrolysis temperatures on the hydrolyzation and hydrolysis rates of HCFC-22. The catalysts are characterized by XRD, N2 isothermal adsorption–desorption, and NH3-TPD. The results show that the solid acid (base) MoO3(MgO)/ZrO2 catalysts have strong catalytic activity for the degradation of HCFC-22, while the catalytic activity of the solid acid MoZr is better than that of the solid base MgZr catalyst and the hydrolysis rate can reach more than 90%. The water vapor generates B-acid centers on the MoO3(MgO)/ZrO2 framework and promotes the hydrolysis of HCFC-22 to HF and HCl.
