Platinum catalyst hydrogen-oxygen reaction

Hudgins 17) has used a sinusoidally varying input in concentration to analyze the frequency response of a reactor for the catalytic dehydrogenation of ethanol using a conventional tubular reactor. Leder and Butt 18) have successfully used frequency response to analyze the dynamic behavior of a fixed-bed catalytic reactor used for the hydrogen-oxygen reaction over a supported platinum catalyst. Hydrogen inlet concentration was varied sinusoidally over frequencies from 2 cycles/ hour to 120 cycles/hour. 

Hydroxylamine sulfate is produced by direct hydrogen reduction of nitric oxide over platinum catalyst in the presence of sulfuric acid. Only 0.9 kg ammonium sulfate is produced per kilogram of caprolactam, but at the expense of hydrogen consumption (11). A concentrated nitric oxide stream is obtained by catalytic oxidation of ammonia with oxygen. Steam is used as a diluent in order to avoid operating within the explosive limits for the system. The oxidation is followed by condensation of the steam. The net reaction is... 

The ease with which the hexosyl-4-ulose derivative 109 undergoes dehydration was demonstrated in a non-enzymic, model reaction. Oxidation of methyl /8-D-galactopyranoside with oxygen and a platinum catalyst, followed by hydrogenation over the same catalyst, resulted in a 35% yield of methyl /8-D-fucopyranoside,423 presumably formed through reactions analogous to those in Fig. 3. 

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