Ni-Co-W-B非晶态催化剂的制备及其加氢脱氧性能  

Preparation and Hydrodeoxygenation Properties of Ni-Co-W-B Amorphous Catalyst

作　　者：王威燕[1] 杨运泉[1] 罗和安[1] 彭会左[1] 张小哲[1] 胡韬[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《催化学报》2011年第10期1645-1650,共6页

基　　金：湖南省教育厅开放基金(10K062);湖南省研究生科研创新项目(CX2009B135)~~

摘　　要：采用化学还原法制备了不同Ni/Co原子比的Ni-Co-W-B非晶态催化剂,以苯酚为探针,研究了其加氢脱氧性能.结果表明,新鲜的Ni-Co-W-B催化剂具有非晶态结构,其中Ni0和B0之间存在电子转移,且随着Co含量的增加,催化剂的热稳定性逐渐提高,表面Ni0含量减少.该催化剂上苯酚加氢脱氧反应按照先加氢再脱氧的方式进行,没有生成苯.当原料中Ni:Co原子比为2:1时,Ni-Co-W-B非晶态催化剂表现出最高的加氢脱氧催化活性,在275oC,氢气压力4.0MPa条件下反应2h,苯酚转化率达99.4%,脱氧率可达86.0%.催化剂的加氢脱氧活性取决于其表面Ni0含量、Bransted酸性和比表面积.Ni-Co-W-B amorphous catalysts with different Ni/Co ratios were prepared by the chemical reduction method,and their hydrodeoxygenation（HDO） activity was tested using phenol as the model compound.All the fresh catalysts showed an amorphous structure,and the electron transfer between Ni0 and B0 occurred in the Ni-Co-W-B amorphous catalysts.The thermal stability of the amorphous catalyst increased and the Ni0 content decreased with increasing Co content.The HDO of phenol on the Ni-Co-W-B amorphous catalysts proceeded through a hydrogenation-deoxygenation route,and no benzene was found in the products.When the Ni：Co atom ratio in the raw material was 2：1,the Ni-Co-W-B amorphous catalyst showed the highest HDO activity.Under the conditions of temperature 275 oC,hydrogen pressure 4.0 MPa,and reaction time 2 h,the phenol conversion and the deoxygenation rate reached 99.4% and 86.0%,respectively.The HDO activity of the Ni-Co-W-B amorphous catalysts depended on the Ni0 content,the Br？nsted acidity,and the catalyst surface area.

关 键 词：非晶态催化剂 苯酚 加氢脱氧 苯 生物油 清洁燃油 

分 类 号：O643.36[理学—物理化学]