固体酸MoO_3/ZrO_2-TiO_2的制备和催化性能的研究  

Study on preparation and catalytic performance of MoO_3/ZrO_2-TiO_2 solid acid

作　　者：赵光琴 唐光阳 贾丽娟 周童 任国庆 常玉 黄荣松 刘天成 ZHAO Guang-qin;TANG Guang-yang;JIA Li-juan;ZHOU Tong;REN Guo-qing;CHANG Yu;HUANG Rong-song;LIU Tian-cheng(College of Chemistry and Environment, Yunnan Minzu University, Joint Research Centre for International Cross-border Ethnic Regions Biomass Clean Utilization in Yunnan, Kunming 650500, China;Yunnan Technician College, Kunming 650500, China;Environmental Protection Bureau of Longchuan Country, Dehong 678700, China)

机构地区：[1]云南民族大学化学与环境学院云南省跨境民族地区生物质资源清洁利用国际联合研究中心,云南昆明650500 [2]云南技师学院,云南昆明650500 [3]陇川县环境保护局,云南德宏678700

出　　处：《云南大学学报（自然科学版）》2018年第4期755-759,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(51568068)

摘　　要：采用混合沉淀过饱和浸渍法制备Mo O_3/Zr O_2-Ti O_2固体酸催化剂.以催化水解CFC-12(CCl_2F_2)的转化率90%作为评价标准,考察并优化浸渍液浓度、浸渍时间、浸渍温度、焙烧温度、焙烧时间等催化剂制备条件.结果表明,催化剂的最佳制备条件为:钛锆摩尔比为7∶3,浸渍液浓度为0.25 mol/L,浸渍时间6 h,浸渍温度60℃,焙烧温度500℃.对催化剂进行XRD、SEM、EDS表征,结果表明该方法合成的催化剂为纯相,主要结构为四方晶相的Zr(Mo O_4)_2掺杂锐钛型的Ti O_2,稳定性较好,是催化水解CFC-12良好的催化剂.The co-precipitation over saturated impregnation method was used to prepare MoO3/ZrO2 -TiO2 solid acid catalyst.The catalytic conversion rate of CFC-12（ CCl2F2） 90% was used as the evaluation criteria.The preparation conditions of the catalyst were optimized by the immersion liquid concentration, impregnation time and temperature, calcination temperature.The results show that the best preparation conditions were as follows：n（Ti） ： n（Zr） is 7 ： 3, the immersion liquid concentration of （NH4）6Mo7O24· 4H2O 0.25 mol/L,the impregnation time is 6 h, impregnation temperature is 60 ℃, the calcination temperature is 500 ℃ .The catalysts were characterized by XRD, SEM and EDS.The results show that the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tet- ragonal Zr（ MoO4） 2 that doped TiO2 of anatase. Stability is good, it is a good catalyst for catalytic hydrolysis of C FC- 12.

关 键 词：MoO3/ZrO2-TiO2 固体酸 催化剂 制备 

分 类 号：TQ139.2[化学工程—无机化工]