Steam gasification of residual oils with potassium catalysts.

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Abstract
This review paper is concerned primarily with the activity of potassium catalyst and the reaction path of the catalytic gasification with steam. The activity test of various potassium compounds, effect of potassium content on gas yield, X-ray diffraction patterns of β"-alumina before and after the reduction of K, and the results of TG analysis of K2SO4 showed that the catalytically active component was not potassium compound, but metallic or cationic potassium. From the experimental results on steam gasification of activated carbon mixed with alumina supported K2CO3, it is deduced that potassium migrates readily to the carbon surface, and forms an unstable potassium-carbon complex which reacts with steam. Catalytic gasification continues until all potassium is consumed.

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