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Oxygen oxidizes CO to CO 2 on a supported metal catalyst in an isothermal plug flow reactor. Use buttons to select plots of "partial pressures" (P), "surface coverages" (θ), or "reaction rate" as a function of distance down the reactor. Use sliders to vary the "temperature", the "CO feed partial pressure", and the "O 2 feed partial pressure". Because the rate-determining step is the reaction of adsorbed CO and adsorbed O, and because CO adsorbs more strongly than O 2, increasing the CO feed partial pressure can decrease the rate of C 2 formation. This happens when the CO surface coverage becomes much higher than the O surface coverage.
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