Water-Gas Shift Reaction over Bimetallic Pt-Ni/Al_2O_3 Catalysts

Authors: BURCU SELEN ÇAĞLAYAN, AHMET ERHAN AKSOYLU

Abstract: The water-gas shift (WGS) activity of bimetallic Pt-Ni/Al_2O_3 catalysts was investigated in the temperature range 200-450 °C using an idealized feed composition consisting of 3% CO and 6%-10% H_2O. The effects of the Ni content, space velocity, and H_2O/CO ratio on the catalytic performance of the catalysts were studied. An increase in the Ni content and H_2O/CO ratio shifted the carbon monoxide conversion--temperature curve toward lower reaction temperatures. No detectable methane formation was observed in the catalytic reaction tests. The results indicate that Pt-Ni/Al_2O_3 catalysts are highly selective and active for water-gas shift reactions under idealized conditions.

Keywords: Water-gas shift, Pt-Ni, CO removal, high temperature shift (HTS)

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