非晶态硼钼氧化物的制备及其加氢脱氧性能  

Preparation of Mo-O-B Amorphous Catalyst and Its Hydrodeoxygenation

作　　者：包建国[1] 杨运泉[1] 王威燕[1] 蒋新民 李娅[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《分子催化》2009年第6期558-563,共6页Journal of Molecular Catalysis(China)

基　　金：国家自然科学基金(NO.20576110);湖南省科技厅攻关项目(NO.06FJ4106);湖南省教育厅重点项目(05A003)

摘　　要：以(NH4)6Mo7O24为原料,以NaBH4作为还原剂分别在冰浴与超声波条件下制备出非晶态催化剂.用FT-IR、SEM、XRD、DSC与XPS进行表征,以苯酚模型化合物研究其加氢脱氧性能.表征结果表明:制备的催化剂都为非晶结构;硼钼氧化物表面没有明显的晶体特征结构;Mo只有部分被还原,冰浴下的Mo以+4与+6价存在,超声波下的Mo为+5与+6价,冰浴法有利于Mo4+的生成;冰浴下所制备的催化剂具有更高的热稳定性以及表现出优良的加氢脱氧活性,在225℃下苯酚的转化率79.3%,远高于同温度下超声波法所制备的催化剂对苯酚的转化率(46.8%).Amorphous catalysts were prepared by chemical reduction of ammonnium heptamolybdate within sodium borohydride aqueous solution under the condition of ice bath and ultrasonic, respectively. The resulting materials were characterized by FT-IR, Scanning electron microscopy, DSC, X-ray diffraction and X-ray photoelectron spectroscoy, the hydrodeoxygenation performances of the catalysts was tested with phenol as the model compound. The resulting of characterization showed that the catalysts were amorphous; molybdenum was not reduced completely which in the form of oxides. The valence state of Mo in the catalyst which was prepared by ice bath method was ＋ 4 and ＋5 ,which different from the ＋ 5 and ＋ 6 of Mo in the catalyst prepared by ultrasonic technique, Mo^4＋ is conducive to the generation of the ice bath method, The catalyst prepared by the ice bath method had a higher thermal Stability and exhibited excellent hydrodeoxygenation activity, the conversion of phenol was 79.3% at temperature 225℃ which higher than the catalyst prepared by ultrasonic technique at the same reaction system（46.8% ）.

关 键 词：非晶态催化剂 硼钼氧化物 表征 加氢脱氧 

分 类 号：O643.3[理学—物理化学] TQ53[理学—化学]