Lecture 23 Thursday 4/1/08 OCNB Explosion Noble Prize 2007 Catalytic Steps. 400. Temperature o C. Cooling Restored. Q r = 0. Isothermal Operation. 200. 175. 9:55 t = 0. 10:40 10:50. midnight 12:18. Temperature-time trajectory. fuse. Catalysts and Catalysis.
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Qr = 0
t = 0
A Catalyst is a substance that affects the rate of chemical reaction but emerges from the process unchanged.
Catalysis is the occurrence, study, and use of catalysts and catalytic processes.
Approximately 1/3 of the GNP of materials produced in the U.S. involves a catalytic process.
Normal Pentane Octane Number = 62
Iso-Pentane Octane Number = 95
Pt (sputtered on)
CV=concentration of vacant sites
Postulate a mechanism: (single site)
In 75% of heterogeneous catalysis, surface reaction is the slow step
Is this consistent with the data?
Linear when PNi0 is low
Low slope when PNi0 is large