摘要
用普通方法和超声波法制备了非晶态Ni-Mo-B催化剂,用BET、SEM、XRD、XPS和FT-IR等手段对催化剂进行表征。以苯酚为探针考察了催化剂的制备因素和反应温度对催化剂加氢脱氧性能的影响,探讨了苯酚在非晶态Ni-Mo-B催化剂表面上的吸附加氢脱氧反应机理。结果表明,超声波条件下制备的催化剂粒径小,颗粒团聚减弱,比表面积大,MoO2与B的含量高,催化剂活性高。在498K时,苯酚的转化率达81.08%,脱氧选择性达93.39%。
The amorphous Ni-Mo-B catalysts were prepared by ultrasonic as well as regular chemical reduction and characterized by BET,SEM,XRD,XPS,and FT-IR.Their catalytic activity in the hydrodeoxygenation of phenol was evaluated.The influences of the catalyst preparation conditions and the reaction temperature on the phenol hydrodeoxygenation were investigated,and a reaction mechanism was proposed.The results showed that the particle size,agglomeration phenomenon,surface area,and MoO2 and B content of the Ni-Mo-B catalysts can be regulated by introducing the ultrasonic treatment into the chemical reduction,which is effective to enhance their catalytic activity in phenol hydrodeoxygenation.At 498 K,the conversion of phenol is 81.08% and the hydrodeoxygenation selectivity reaches 93.39%.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2009年第6期701-706,共6页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(20576110)
湖南省科技厅攻关项目(06FJ4106)
湖南省教育厅重点项目(05A003)
关键词
非晶态催化剂
镍
钼
硼化物
加氢脱氧
amorphous catalyst
nickel
molybdenum
boride
hydrodeoxygenation
