lecture 6 - CHE 349, Lecture 7 CHE 349: Kinetics and...

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CHE 349: Kinetics and Reactor Design Lecture 8 Lecture 8 Jing Wu 350 Tiernan Department of Chemical Engineering ± jingwu@adm.njit.edu ² 973-642-7064 CHE 349 - Lecture 7 by Jing Wu 2 Assignments Reading: 3.3.4 – 3.4 Homework 3-7 (b,c), 3-10, 3-12, 3-14 CHE 349 - Lecture 7 by Jing Wu 3 Last Time, Stoichiometric Table -- Const Vol. Flow Systems (I) CHE 349 - Lecture 7 by Jing Wu 4 Stoichiometric Table – Const. Vol. Flow Systems (II) D a d C a c B a b A + + liter moles time liters time moles v F C A A = = = / / ) 1 ( 0 X v F v F C A A A = = v X F a b F v F C A B B B 0 0 ) / ( = = v X F a c F v F C A C C C 0 0 ) / ( + = = Θ = X a b C C B A B 0 ) 1 ( ) 1 ( 0 0 0 X C v X F C A A A = = Constant volume
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CHE 349 - Lecture 7 by Jing Wu 5 Summary: Stoichiometric Table Constant Volume Systems D a d C a c B a b A + + 1 + = a b a c a d δ 0 0 0 0 0 0 A i A i A i i y y C C N N = = = Θ ) 1 ( ) 1 ( 0 0 0 X C V X N C A A A = = Θ = Θ = X a b C V X a b N C B A B A B 0 0 0 ] ) / ( [ + Θ = X a c C C C A C 0 V = V 0 CHE 349 - Lecture 7 by Jing Wu 6 Volume Change with Reaction Case 1: Gas Phase Reaction: Change in volume and volumetric flow rate. 3 2 2 2 3 NH H N + Case 2: Volume Changes with time in batch reactors Example: Combustion chamber, barrel of a firearm CHE 349 - Lecture 7 by Jing Wu 7 Change in Stoichiometric Table ? 0 0 0 0 ) / ( v X F a c F v F C A C C C + = = Θ = Θ = X a b C V X a b N C B A B A B 0 0 0 ] ) / ( [ CHE 349 - Lecture 7 by Jing Wu 8 Variable Volume Batch Gas Phase Reactor (I) PV = ZN T RT P 0 V 0 = Z 0 N T0 RT 0 0 0 0 0 0 T T N N Z Z T T P P V V = Express N T /N T0 : X N N N A T T 0 0 + = X
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lecture 6 - CHE 349, Lecture 7 CHE 349: Kinetics and...

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