助剂α-Sb_2O_4对杂多化合物催化剂选择氧化异丁烷的影响  

Effect of α-Sb_2O_4 on Heteropolycompound Catalyst for Selective Oxidation of Isobutane

作　　者：彭振山[1] 方正军[1] 邓谦[1] 龙云飞[1] 余长林[1] 蔡铁军[1] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201

出　　处：《分子催化》2005年第1期50-54,共5页Journal of Molecular Catalysis(China)

基　　金：湖南省教育厅科研项目 [0 2C463 ];[0 3C5 15 ]

摘　　要：采用组合法制备了具有Keggin结构的杂多化合物催化剂 ,采用FTIR、UV VIS DR、H2 - TPR、BET、TG DTA和SEM对合成的催化剂的结构和性质进行了研究 .探讨了催化剂中助剂α- Sb2 O4含量对异丁烷选择性催化氧化的影响 .并考察了反应温度对催化剂的催化性能影响 .实验表明 ,助剂含量为 8.3% ,在C4H10 /O2 /N2 /H2 O=1/2 .6 /6 /1,GHSV为 910h-1,温度为 380℃的条件下 ,甲基丙烯酸的收率可达 10 .4 % ,选择性为 4 4 .3% .Keggin-type heteropolycompound catalyst was prepared by combination. Study of structure and properties of catalysts were carried out with FTIR, UV-VIS-DR, H_2-TPR, BET, TG-DTA and SEM. The influence of α-Sb_2O_4 content on selective oxidation of isobutane was evaluated. The effect of reaction temperature was also investigated. Results show when the content of promoter was 8.3%, under the reaction conditions: C_4H_(10)/O_2/N_2/H_2O = 1/2.6/6/1, space volocity = 910 h^(-1), T = 380 ℃, the yield and the selectivity of methacrylic acid reached 10.4% and 44.3%, respectively.

关 键 词：杂多化合物催化剂 异丁烷 助剂α-Sb2O4 选择性氧化 甲基丙烯酸 

分 类 号：O643.32[理学—物理化学]