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Unformatted text preview: 7.1. ISOTHERMAL, ISOCHORIC KINETICS 249 Again, A is an arbitrary constant. Obviously the equilibrium is stable. Moreover the time constant of relaxation to equilibrium is τ = 1 2 . 09575 × 10 7 = 4 . 77156 × 10 − 8 s. (7.146) This is consistent with the time scale to equilibrium which comes from integrating the full equation. 7.1.2 Zel’dovich mechanism of NO production Let us consider next a more complicated reaction system: that of NO production known as the Zel’dovich 6 mechanism. This is an important model for the production of a major pollutant from combustion processes. It is most important for high temperature applications. 7.1.2.1 Mathematical model The model has several versions. One is 1 : N + NO ⇌ N 2 + O, (7.147) 2 : N + O 2 ⇌ NO + O. (7.148) similar to our results for O 2 dissociation, N 2 and O 2 are preferred at low temperature. As the temperature rises N and O begin to appear, and it is possible when they are mixed for NO to appear as a product....
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This note was uploaded on 11/26/2011 for the course EGN 3381 taught by Professor Parksou during the Fall '11 term at FSU.
 Fall '11
 ParkSou
 Dynamics

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