关键词:

水煤气变换催化剂, 多元体金属组分;等体积浸渍法;制备参数;还原条件

Abstract:

Using γ-Al2O3 as a support, a multiple-metal （Ni-Cu-Mn-K/Al2O3）catalyst for high- temperature water gas shift reaction was prepared by an equivalent-volumetric two-step impregnation method.Preparation parameters and reduction conditions were determined by TG, DTA and TPR characterization techniques.The results showed that, when loading ratio (Ni∶Cu∶Mn), impregnation time, and calcination temperature were 2∶1.5∶1, 300 min and 400℃ for the first-step impregnation respectively, loading of K+ was 5% in the second step impregnation, and reduction temperature was 400℃ and a proper amount of steam was added, the catalyst prepared in this work showed excellent catalytic performance and thermal stability, as compared with the existing commercial catalysts.Meanwhile, the ammonium-nitrogen wastewater produced with conventional preparation methods was eliminated with the eqivalent-volumetic impregnation method proposed in this work.

Key words:

水煤气变换催化剂, 多元体金属组分;等体积浸渍法;制备参数;还原条件