H_2O_2改性溶胶-凝胶法制备ZrO_2基催化剂载体  

Synthesis of ZrO_2-based Catalyst Support by Improved Sol-Gel Method with H_2O_2 Oxidation

作　　者：杨玮娇[1,2] 唐清[1] 李锐星[3] 柳海涛[1] 李会泉[1] 

机构地区：[1]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190 [2]中国科学院研究生院,北京100049 [3]北京航空航天大学材料科学与工程学院,北京100191

出　　处：《过程工程学报》2009年第4期819-823,共5页The Chinese Journal of Process Engineering

基　　金：中石油科技风险创新研究基金资助项目(编号:0706D01040408)

摘　　要：采用改性溶胶-凝胶法,以H2O2除去胶体中Cl-后,用蒸馏法干燥,制备了ZrO2粉末.考察了H2O2/ZrO2摩尔比、蒸馏温度及煅烧温度对ZrO2粉末结构特性的影响.结果表明,优化的工艺条件为:H2O2/ZrO2摩尔比1:2,蒸馏温度80℃,煅烧温度500℃.产品为粒径12～16nm的类球形高纯四方相纳米氧化锆颗粒.该粉末担载5%(ω)Cr2O3后用于CO2氧化丙烷脱氢制丙烯的催化,丙烷转化率为53.4%,丙烯收率为38.1%,CO2转化率为33.3%.Nano-sized tetragonal ZrO2 particles from 12 to 16 nm in diameter were successfully synthesized by an improved sol-gel method,assisted with a distillation-dehydration process after oxidization of Cl-anions by H2O2.The microstructure of synthesized ZrO2 particles was characterized with SEM,TEM,XRD and thermal analysis.The effects of molar ratio of H2O2 to ZrO2,distillation temperature and calcination temperature on the microstructure of ZrO2 powder were studied.The optimum conditions were obtained as follows：molar ratio of H2O2 to ZrO2 1：2,distillation temperature 80℃ and calcination temperature 500℃.Spherical-like nano-sized tetragonal ZrO2 particles could be obtained by the process,and the reactivity of this ZrO2 loading 5%（ω） Cr2O3 for propane dehydrogenation oxidized by CO2 was as follow：53.4% propane conversion rate,38.1% propylene yield and 33.3% CO2 conversion rate.

关 键 词：ZRO2 溶胶凝胶法 H2O2 蒸馏法 丙烷脱氢 

分 类 号：TQ134[化学工程—无机化工]