화학공학소재연구정보센터
Catalysis Letters, Vol.148, No.12, 3592-3607, 2018
Measurement and Characterization of a High-Temperature, Coke-Resistant Bi-functional Ni/BZY15 Water-Gas-Shift Catalyst Under Steam-Reforming Conditions
This paper characterizes the bi- functional behavior of a unique, nano- dispersed Ni/ BZY15 water- gas- shift catalyst under steam- reforming conditions. The catalyst is highly active above 500. C and has been found to be exceptionally stable in a hydrocarbon steam reforming environment. The performance can be attributed to two features: ( 1) well dispersed, nano- sized Ni particles with high surface area, and ( 2) the ability of the redox- active BZY15 support to remove carbon from the Ni. The bi- functionality is demonstrated through a comparison of WGS activity with BZY15 alone and with a traditional Al 2 O 3 support. The WGS activity is measured under a range of operating temperatures, steam- to- carbon ratios, and feed- gas flow rates. A series of elementary reaction steps are proposed to explain the bi- functionality and to provide a basis for development of a detailed reaction mechanism. [GRAPHICS]