Catalytic Hydrolysis of CFC-12 over MoO_(3)/ZrO_(2)-TiO_(2)  

作　　者：谭小芳 ZHOU Tong LI Zhiqian REN Guoqing JIA Lijuan 刘天成 TAN Xiaofang;ZHOU Tong;LI Zhiqian;REN Guoqing;JIA Lijuan;LIU Tiancheng(College of Chemistry and Environment,Yunnan Minzu University,Innovation Team of Green Purifcation Technology for Industrial Waste Gas,Education Department of Yunnan,Kunming 650504,China;Dehong Vocational College,Dehong 678400,China)

机构地区：[1]College of Chemistry and Environment,Yunnan Minzu University,Innovation Team of Green Purifcation Technology for Industrial Waste Gas,Education Department of Yunnan,Kunming 650504,China [2]Dehong Vocational College,Dehong 678400,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第1期59-64,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51568068);the Young and Middle-aged Academic and Technical Leaders Reserve Talent Program(No.202105AC160054)。

摘　　要：Solid acid MoO_(3)/ZrO_(2)-TiO_(2)catalysts were prepared by impregnation method,and catalytic hydrolysis of difluorodichloromethane(CFC-12)over the catalyst was studied.The presence of MoO_(3)/ZrO_(2)-TiO_(2)catalyst in polycrystalline state could be clearly observed by transmission electron microscopy(TEM).Mesopores were detected by N2 adsorption-desorption isotherms which further confirmed the MoO_(3)/ZrO_(2)-TiO_(2)structural characteristics of catalyst.The results of NH_(3)-TPD showed that the calcination temperatures had a great influence on the acidity of the catalyst,and the weak acidic site had a strong catalytic activity for the catalytic hydrolysis of CFC-12.Moreover,ZrO_(2)-TiO_(2)was highly dispersed in the MoO_(3)framework,suggested by powder X-ray diffraction(XRD)and N_(2)adsorption-desorption results.The effects of the catalyst calcination temperatures on the conversion rate of CFC-12 were studied.The effects of catalytic hydrolysis temperatures and water vapor concentration on the catalytic hydrolysis rate of CFC-12 were also studied.The solid acid MoO_(3)/ZrO_(2)-TiO_(2)was calcined at 500℃for 3 h at a catalytic hydrolysis temperature of 400℃and water vapor concentration of 83.18%,and catalytic hydrolysis rate of CFC-12 reached 98.65%.The hydrolysis rate of CFC-12 remained above 65.34%after 30 hours continuous reaction.

关 键 词：catalytic hydrolysis difluorodichloromethane(CFC-12) MoO_(3)/ZrO_(2)-TiO_(2) solid acid catalyst 

分 类 号：TQ426[化学工程]