Monoliths for Partial Oxidation Catalysis

Monolith catalysts are effective for partial oxidation reactions at high temperatures at contact times between 10 −4 and 10 −2 sec. We summarize results for three reactions: (1) syngas by direct oxidation of CH 4 , (2) olefins by oxidative dehydrogenation of alkanes, and (3) HCN by ammoxidation of CH 4 , and we consider what features of monoliths create optimal selectivity with high conversions. Monoliths used are noble metal films coated on ceramic foams, extruded ceramics, ceramic fibers, and woven Pt-10%Rh gauze catalysts. Effects of metals and geometries of the ceramics are ceramics are compared to show how these factors influence activity and selectivity.

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