This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: 7.1. ISOTHERMAL, ISOCHORIC KINETICS 263 LBracket1 NO RBracket1 LBracket1 N RBracket1 10 Minus 8 10 Minus 6 10 Minus 4 0.01 1 100 t LParen1 s RParen1 10 Minus 16 10 Minus 14 10 Minus 12 10 Minus 10 10 Minus 8 LBracket1 N RBracket1 , LBracket1 NO RBracket1 LParen1 mole Slash1 cc RParen1 Figure 7.11: ρ NO and ρ N versus time for Zel’dovich mechanism at T = 1500 K , P = 6 . 2355 × 10 3 dyne/cm 2 . the high pressure P = 6 . 2355 × 10 5 dyne/cm 2 , T = 1500 K case, we notice some similarities and dramatic differences. The overall shape of the timeprofiles of concentration variation is similar. But, we see the reaction commences at a much later time, t ∼ 10 − 6 s . For t ∼ 10 − 4 s , there is a temporary cessation of significant reaction. We notice a long plateau in which species concentrations do not change over several decades of time. This is again actually a pseudoequilibrium. Significant reaction recommences for t ∼ 10 s . Only around t ∼ 100 s does the system approach final equilibrium. We can perform an eigenvalue analysisdoes the system approach final equilibrium....
View
Full Document
 Fall '11
 ParkSou
 Dynamics, Numerical Analysis, Time scales, J. M. Powers

Click to edit the document details