Elementary Principles 73

# Elementary Principles 73 - 4.41 (cont'd) e. 10 5 45 0.0119...

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4- 32 4.41 (cont’d) Rm V kmol / h c =− = ⇒= + = 10 7 45 00119 765 00605 5 7 539 7 3 5 3 127 4 bg b g b g .. . . ± n c e. Faulty sensors, computer problems, analyzer calibration not linear, extrapolation beyond range of calibration data, system had not reached steady state yet. 4.42 165 1 mol/s mol C H / mol mol HBr / mol 24 x x ± . . n mol / s mol C H / mol mol HBr / mol 0.517 mol C H Br / mol 25 0310 0173 CH HB r CHB r +→ C balance : 165 2 0310 2 0517 2 mol s molC H mol molC molC H x nn b g b g =+ ± . ± . (1) Br balance : () ( ) ( )( ) ( )( ) 165 1 1 0.173 1 0.517 1 xn n −= + ±± (2) (Note: An atomic H balance can be obtained as 2*(Eq. 2) + (Eq. 1) and so is not independent) Solve (1) and (2) simultaneously = = ± nx 10877 0545 mol / s, molC H / mol ⇒− = 10 4 5 5 x .m o l H B r / m o l Since the C 2 H 4 /HBr feed ratio (0.545/0.455) is greater than the stoichiometric ration (=1),
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