Article

Effect of addition sequence during neutralization and precipitation on iron-based catalysts for high temperature shift reaction

Petroleum Science (impact factor: 0.47). 04/2012; 4(1):75-80. DOI:10.1007/BF03186578 pp.75-80

ABSTRACT The preparation of the iron-based catalysts promoted by cobalt with a small amount of copper and aluminum for the high temperature
shift reaction (HTS) with different sequences of adding catalyst raw materials during neutralization and precipitation was
investigated. XRD, BET and particle size distribution (PSD) were used to characterize the prepared catalysts. It was found
that the catalyst crystals were all γ-Fe2O3, and the intermediate of the catalyst after aging was Fe3O4. The crystallographic form of the catalyst and its intermediate was not affected by the addition sequence in the neutralization
and precipitation process. The results showed that the specific surface area and the particle size of the catalysts depended
on the addition sequence to the mother liquor. Cobalt with a small amount of copper and aluminum could increase the specific
surface area and decrease the particle size of catalysts.

Key wordsWater gas shift reaction-γ-Fe2O3
-cobalt-promoted catalyst-iron-based catalyst

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Keywords

addition sequence
 
aluminum
 
catalyst
 
catalyst crystals
 
catalyst raw materials
 
catalysts
 
cobalt
 
different sequences
 
iron-based catalysts
 
neutralization
 
particle size
 
particle size distribution
 
precipitation process
 
prepared catalysts
 
small amount
 
specific
 
specific surface area
 
XRD
 

Li Wei