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CSTR with Heat Effects Energy Balance for CSTRs Equation (8-9)        (page 476)

Published byDwain Weaver Modified over 9 years ago

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Presentation on theme: "CSTR with Heat Effects Energy Balance for CSTRs Equation (8-9)        (page 476)"— Presentation transcript:

1 Lecture 22 Thursday 3/27/08 Blowout Velocity CSTR Explosion Batch Reactor Explosion

2 CSTR with Heat Effects Energy Balance for CSTRs Equation (8-9)        (page 476)

3 (page 593)

4 At Steady State Solving for X Solving for T

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7 Mole Balance Rate Law Stoichiometry Combine

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13 Heat Effects Isothermal Design Stoichiometry Rate Laws Mole Balance

14 Isothermal Design Heat Effects Rate Laws Stoichiometry Mole Balance

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24 Safety in Chemical Reactors

25 Then rearranging Equation (9-8)

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27 Complete conversion FA = 0
Batch Reactors with Heat Effects Single Reactions Multiple Reactions Risk Rupture

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29 Reactor Mole Balance Summary

30 Keeping MBAs Away From Chemical Reactors
The process worked for 19 years before they showed up!! Why did they come???? What did they want????

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35 Nitroaniline Synthesis Reaction
NO2 NH2 Cl NH3 + NH4Cl ONCB Ammonia Nitroanaline Ammonium Chloride

36 Nitroaniline Synthesis Process
Autoclave 175 oC ~550 psi NH3 Separation Filter Press NH3 in H2O ONCB O-Nitroaniline Product Stream “fast” Orange To Crystallizing Tanks

37 Nitroaniline Synthesis Reactor
Old 3 kmol ONCB 43 kmol Ammonia 100 kmol Water V = 3.25 m3

38 Same Nitroaniline Synthesis Reaction
NO2 NH2 Cl NH3 + NH4Cl ONCB Ammonia Nitroanaline Ammonium Chloride Batch Reactor, 24 hour reaction time Management said: TRIPLE PRODUCTION

39 MBA Style Nitroaniline Synthesis Reactor
New 9 kmol ONCB 33 kmol Ammonia 100 kmol Water V = 5 m3

40 Monsanto Accident

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43 Temperature-time trajectory
9:55 t = 0 10: :50 midnight 12:18 Isothermal Operation Cooling Restored 200 175 400 Temperature oC fuse

44 Temperature-time trajectory
9:55 t = 0 10: :50 midnight 12:18 Isothermal Operation Cooling Restored Qr = 0 200 175 400 Temperature oC fuse

45 CSTR multiple reactions
=0

46 Example Mole balance) Rates) net rates, relative rates, rate laws….. Stoichiometry) Energy Balance)

47 FA0 FI0 A If the flow rate shut off, the temperature will rise (possibly to point of explosion!)

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