稀土添加剂对烃类转化Ni/α-Al_2O_3催化剂活性及稳定性的影响

<正> 一、前言烃类蒸汽转化制氢的关键是催化剂,因此多年来,国内外许多科研工作者在这方面做了大量的工作,并开发出了许多较为成功的催化剂。但随着新工艺的发展,加之工艺条件的日益强化,如空速、压力的不断增加,水碳比越来越低,原料馏分重而杂等,势必对制氢催化

Effect of Rare Earth Additive on the Activity and Stability of Hydrocarbon Reforming Catalyst Ni/α-Al_2O_3

This paper studies the effect of rare earth lanthanum and cerium on the activity and stability of Ni/a--A1_2O_(?) catalyst, The experimental results indicate that: (1) the amount of additives lanthanum and cerium affects the activity and stability to to some extent; (2) a moderate amount of these rare earth elements can disperse the active component nickel, and obviously enhance the stability of the catalyst. What is more important is that lanthanum and cerium coexist in the same nickel catalyst, creating a synelgism which promotes the activity and stability of the catalyst.