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275 ℃,氢气压力4.0 MPa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、Br?nsted酸性和比表面积.
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