Catalytic Hydrolysis of CFC-12 over MoO3/ZrO2-TiO2
Catalytic Hydrolysis of CFC-12 over MoO3/ZrO2-TiO2作者机构：College of Chemistry and Environment Yunnan Minzu University Innovation Team of Green Purifcation Technology for Industrial Waste Gas Education Department of Yunnan Dehong Vocational College
出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报(材料科学版)(英文版))
年 卷 期：2023年第38卷第1期
页 面：59-64页
核心收录：
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0804[工学-仪器科学与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
基 金：FundedbytheNationalNaturalScienceFoundationofChina(No.51568068) theYoungandMiddle-agedAcademicandTechnicalLeadersReserveTalentProgram(No.202105AC160054)
主 题：catalytic hydrolysis difluorodichloromethane(CFC-12) MoO 3 /ZrO 2 -TiO 2 solid acid catalyst
摘 要：Solid acid MoO3/ZrO2-TiO2catalysts were prepared by impregnation method, and catalytic hydrolysis of difluorodichloromethane(CFC-12) over the catalyst was studied. The presence of MoO3/ZrO2-TiO2catalyst in polycrystalline state could be clearly observed by transmission electron microscopy(TEM).Mesopores were detected by N2 adsorption-desorption isotherms which further confirmed the MoO3/ZrO2-TiO2structural characteristics of catalyst. The results of NH3-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, ZrO2-TiO2was highly dispersed in the MoO3framework, suggested by powder X-ray diffraction(XRD) and N2adsorption-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 MoO3/ZrO2-TiO2was 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.
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