WGS reaction on gold-ceria

Recently many authors have discussed different aspects of the WGS reaction over gold-based catalysts on ceria activity, stability, deactivation, influence of reaction conditions, pretreatment of the catalysts, Andreeva s group was a pioneer in these 

Note The number before Au indicates the gold loading (wt%) of the catalysts. 

2 1TG5 reaction over gold based on doped ceria 

Galletti et al reported the results of WGS activity over Au supported on CeOg-AlgOs under realistic stream conditions. The samples reached a maximum of 37% CO conversion at 330 °C, very far from the equilibrium curve. Note, however, that above 300 °C, the WGS activity of unpromoted ceria is significant.  

Mixed CeOg-MegOg (Me=La, Sm, Gd, or Yb) supports were used successfully as supports of gold catalysts for WGS reactions. The mixed oxide supports were prepared by GP or MA. Results of catalytic activity tests for WGS reactions of fresh catalysts and after pretreatment in air are given in Figs. 10.8 and 10.9. It can be seen that the MA samples are more active than those prepared by GP but the differences are not as large as for Al-modified ceria catalysts.  

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