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Catalytic Reduction of Sulfur Dioxide on Iron-alumina Bifunctional Catalysts.
Khalafalla-SE; Foerster-EF; Haas-LA
I&ec Product Res and Dev 1971 Jun; 10:133-137
Mixtures of alumina and iron powder provide efficient catalysts for the interaction of low concentration of so2 with carbon monoxide The catalytic reaction rate at 500 deg. C depended significantly on the iron content of the binary catalyst mixture. Mixtures containing 43 percent freshly reduced iron exhibited a sharp peak in the catalytic activity at 500 deg. C when compared with other catalyst compositions. The normalized reaction rate per gram of iron, instead of per gram of total catalyst, still portrayed a sharp maximum when plotted against the weight fraction of iron in the catalyst. This fact, in addition to nonsynergistic effects observed with iron-silica mixtures, disqualifies interpretations based solely on the antisintering or supportive action of alumina on iron. The results are best explained on the basis of a dual reaction site mechanism with both iron and alumina augmenting their specific sites activity at their interparticle contacts.
I&ec Product Res. and Dev., V. 10, June 1971, PP. 133-137
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