Lecture Thursday 4/3/08 Normal Pentene  Iso-Pentane Langmuir Adsorption Isotherm Catalytic Converters for Automobiles.

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Presentation transcript:

Lecture Thursday 4/3/08 Normal Pentene  Iso-Pentane Langmuir Adsorption Isotherm Catalytic Converters for Automobiles

Last Time Catalytic Reforming Reaction (Gasoline) Normal Pentane Octane Number =62 Iso-Pentane Octane Number=90 Normal Pentene  Iso-Pentane

Steps in a Catalytic Reaction

More Catalysis Langmuir Adsorption Isotherm Increasing T Slope=k A

Automotive Catalytic Converters -Placed inline with exhaust system (~ $500) -NO x plays big role in smog formation Propose a mechanism (from graph data, we see CO 2 is not on the surface and that the surface reaction is irreversible)

Is this consistent with the given data? -No CO 2 in rate law -rate law decreases as P N 2 increases The contribution of P N 2 is very small and can be neglected optimum