<ul><li>Chemical Reaction Engineering  (CRE) is the field that studies the rates and mechanisms of chemical reactions and ...
Chemical Reaction Engineering <ul><li>Chemical reaction engineering  is at the heart of virtually every chemical process. ...
 
 
Materials on the Web and CDROM <ul><li>http://www.engin.umich.edu/~cre/ </li></ul>
 
 
 
 
 
Developing Critical Thinking Skills <ul><li>Socratic Questioning  </li></ul><ul><li>is the  </li></ul><ul><li>Heart of Cri...
Let’s Begin CRE <ul><li>Chemical Reaction Engineering  (CRE) is the field that studies the rates and mechanisms of chemica...
<ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul>Chemical Identity
<ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul><ul><li>The identity ...
<ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul>Chemical Identity 1. ...
<ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul>Chemical Identity 1. ...
<ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul>Chemical Identity 1. ...
<ul><li>The reaction rate is the rate at which a species looses its chemical identity per unit volume. </li></ul>Reaction ...
<ul><li>The reaction rate  is the rate at which a species looses its chemical identity per unit volume. </li></ul><ul><li>...
Reaction Rate Consider the isomerization  A  B r A  = the rate of formation of species A per unit volume   -r A  = the ra...
Reaction Rate <ul><li>EXAMPLE:  A  B </li></ul><ul><ul><li>If Species B is being formed at a rate of  </li></ul></ul><ul>...
Reaction Rate <ul><li>EXAMPLE:  A  B </li></ul><ul><ul><li>r B  = 0.2 mole/dm 3 /s </li></ul></ul><ul><ul><li>Then A is d...
Reaction Rate <ul><li>EXAMPLE:  A  B </li></ul><ul><ul><li>r B  = 0.2 mole/dm 3 /s </li></ul></ul><ul><ul><li>Then A is d...
Reaction Rate <ul><li>For a catalytic reaction, we refer to -r A ',  </li></ul><ul><li>which is the rate of disappearance ...
Reaction Rate <ul><li>Consider species j:  </li></ul><ul><li>r j  is the rate of formation of species j per unit volume [e...
Reaction Rate <ul><li>r j  is the rate of formation of species j per unit volume [e.g. mol/dm 3 *s]  </li></ul><ul><li>r j...
Reaction Rate <ul><li>r j  is the rate of formation of species j per unit volume [e.g. mol/dm 3 /s]  </li></ul><ul><li>r j...
Reaction Rate <ul><li>r j  is the rate of formation of species j per unit volume [e.g. mol/dm 3 /s]  </li></ul><ul><li>r j...
General Mole Balance
General Mole Balance
Batch Reactor Mole Balance
CSTR Mole Balance
Plug Flow Reactor
Plug Flow Reactor Mole Balance PFR: The integral form is: This is the volume necessary to reduce the entering molar flow r...
Packed Bed Reactor  Mole Balance PBR The integral form to find the catalyst weight is:
Reactor Mole Balance Summary
Fast Forward to the Future <ul><li>Thursday March 20 th , 2008 </li></ul><ul><li>Reactors with  Heat Effects </li></ul>
Production of Propylene Glycol in an Adiabatic CSTR
What are the exit conversion X  and exit temperature T? Solution Let the reaction be represented by
 
 
 
 
 
 
 
 
KEEPING UP
Separations  These topics do not build upon one another Filtration Distillation Adsorption
Reaction Engineering These topics build upon one another Mole Balance Rate Laws Stoichiometry
Mole Balance Rate Laws Stoichiometry Isothermal Design Heat Effects
Mole Balance Rate Laws
Mole Balance Rate Laws Stoichiometry Isothermal Design Heat Effects
 
 
 
 
 
 
 
 
Batch Reactor Mole Balance
Batch Reactor Mole Balance
Batch Reactor Mole Balance
Batch Reactor Mole Balance
Batch Reactor Mole Balance
Continuously Stirred Tank Reactor  Mole Balance
Continuously Stirred Tank Reactor  Mole Balance
Continuously Stirred Tank Reactor  Mole Balance
C S T R  Mole Balance
CSTR Mole Balance
Plug Flow Reactor
Plug Flow Reactor Mole Balance PFR:
Plug Flow Reactor Mole Balance PFR:
Plug Flow Reactor Mole Balance PFR:
Plug Flow Reactor Mole Balance PFR:
Plug Flow Reactor Mole Balance PFR:
Plug Flow Reactor Mole Balance PFR: The integral form is:
Plug Flow Reactor Mole Balance PFR: The integral form is: This is the volume necessary to reduce the entering molar flow r...
Packed Bed Reactor Mole Balance PBR
Packed Bed Reactor Mole Balance PBR
Packed Bed Reactor Mole Balance PBR
Packed Bed Reactor Mole Balance PBR
Packed Bed Reactor Mole Balance PBR The integral form to find the catalyst weight is:
Reactor Mole Balance Summary
Reactor Mole Balance Summary
Reactor Mole Balance Summary
Reactor Mole Balance Summary
 
 
 
 
 
 
 
 
 
Chemical Reaction Engineering   Asynchronous Video Series   Chapter 1: General Mole Balance Equation Applied to  Batch Rea...
http://www.engin.umich.edu/~cre
 
 
 
 
 
 
Chemical Reaction Engineering <ul><li>Chemical reaction engineering  is at the heart of virtually every chemical process. ...
Compartments for perfusion Perfusion interactions between compartments are shown by arrows.  V G ,  V L ,  V C , and  V M ...
 
Chemical Reaction Engineering <ul><li>Chemical reaction engineering  is at the heart of virtually every chemical process. ...
Reaction Rate Consider the isomerization  A  B r A  = the rate of formation of species A per unit volume
Reaction Rate Consider the isomerization  A  B r A  = the rate of formation of species A per unit volume   -r A  = the ra...
Reactor Mole Balance Summary
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Chemical reaction engineering

  1. 1. <ul><li>Chemical Reaction Engineering (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place. </li></ul><ul><li>TODAY’S LECTURE </li></ul><ul><li>Introduction </li></ul><ul><li>Definitions </li></ul><ul><li>General Mole Balance Equation </li></ul><ul><li>Batch </li></ul><ul><li>CSTR </li></ul><ul><li>PFR </li></ul><ul><li>PBR </li></ul><ul><li> </li></ul>
  2. 2. Chemical Reaction Engineering <ul><li>Chemical reaction engineering is at the heart of virtually every chemical process. It separates the chemical engineer from other engineers. </li></ul><ul><li>Industries that Draw Heavily on Chemical Reaction Engineering (CRE) are: </li></ul><ul><li>CPI (Chemical Process Industries) </li></ul><ul><li>Dow, DuPont, Amoco, Chevron </li></ul>
  3. 5. Materials on the Web and CDROM <ul><li>http://www.engin.umich.edu/~cre/ </li></ul>
  4. 11. Developing Critical Thinking Skills <ul><li>Socratic Questioning </li></ul><ul><li>is the </li></ul><ul><li>Heart of Critical Thinking </li></ul><ul><li>R. W. Paul’s Nine Types of Socratic </li></ul><ul><li>Questions </li></ul>
  5. 12. Let’s Begin CRE <ul><li>Chemical Reaction Engineering (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place. </li></ul>
  6. 13. <ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul>Chemical Identity
  7. 14. <ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul><ul><li>The identity of a chemical species is determined by the kind , number , and configuration of that species’ atoms. </li></ul>Chemical Identity
  8. 15. <ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul>Chemical Identity 1. Decomposition
  9. 16. <ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul>Chemical Identity 1. Decomposition 2. Combination
  10. 17. <ul><li>A chemical species is said to have reacted when it has lost its chemical identity. </li></ul>Chemical Identity 1. Decomposition 2. Combination 3. Isomerization
  11. 18. <ul><li>The reaction rate is the rate at which a species looses its chemical identity per unit volume. </li></ul>Reaction Rate
  12. 19. <ul><li>The reaction rate is the rate at which a species looses its chemical identity per unit volume. </li></ul><ul><li>The rate of a reaction (mol/dm 3 /s) can be expressed as either </li></ul><ul><li>the rate of Disappearance: -r A </li></ul><ul><li>or as </li></ul><ul><li>the rate of Formation (Generation): r A </li></ul>Reaction Rate
  13. 20. Reaction Rate Consider the isomerization A  B r A = the rate of formation of species A per unit volume -r A = the rate of a disappearance of species A per unit volume r B = the rate of formation of species B per unit volume
  14. 21. Reaction Rate <ul><li>EXAMPLE: A  B </li></ul><ul><ul><li>If Species B is being formed at a rate of </li></ul></ul><ul><ul><li>0.2 moles per decimeter cubed per second, ie, </li></ul></ul><ul><ul><li>r B = 0.2 mole/dm 3 /s </li></ul></ul>
  15. 22. Reaction Rate <ul><li>EXAMPLE: A  B </li></ul><ul><ul><li>r B = 0.2 mole/dm 3 /s </li></ul></ul><ul><ul><li>Then A is disappearing at the same rate: </li></ul></ul><ul><ul><li>-r A = 0.2 mole/dm 3 /s </li></ul></ul>
  16. 23. Reaction Rate <ul><li>EXAMPLE: A  B </li></ul><ul><ul><li>r B = 0.2 mole/dm 3 /s </li></ul></ul><ul><ul><li>Then A is disappearing at the same rate: </li></ul></ul><ul><ul><li>-r A = 0.2 mole/dm 3 /s </li></ul></ul><ul><ul><li>The rate of formation (generation of A) is </li></ul></ul><ul><ul><li>r A = -0.2 mole/dm 3 /s </li></ul></ul>
  17. 24. Reaction Rate <ul><li>For a catalytic reaction, we refer to -r A ', </li></ul><ul><li>which is the rate of disappearance of </li></ul><ul><li>species A on a per mass of catalyst basis. </li></ul><ul><li>(mol/gcat/s) </li></ul><ul><li>NOTE: dC A /dt is not the rate of reaction </li></ul>
  18. 25. Reaction Rate <ul><li>Consider species j: </li></ul><ul><li>r j is the rate of formation of species j per unit volume [e.g. mol/dm 3 /s] </li></ul>
  19. 26. Reaction Rate <ul><li>r j is the rate of formation of species j per unit volume [e.g. mol/dm 3 *s] </li></ul><ul><li>r j is a function of concentration, temperature, pressure, and the type of catalyst (if any) </li></ul>
  20. 27. Reaction Rate <ul><li>r j is the rate of formation of species j per unit volume [e.g. mol/dm 3 /s] </li></ul><ul><li>r j is a function of concentration, temperature, pressure, and the type of catalyst (if any) </li></ul><ul><li>r j is independent of the type of reaction system (batch reactor, plug flow reactor, etc.) </li></ul>
  21. 28. Reaction Rate <ul><li>r j is the rate of formation of species j per unit volume [e.g. mol/dm 3 /s] </li></ul><ul><li>r j is a function of concentration, temperature, pressure, and the type of catalyst (if any) </li></ul><ul><li>r j is independent of the type of reaction system (batch, plug flow, etc.) </li></ul><ul><li>r j is an algebraic equation, not a differential equation </li></ul>
  22. 29. General Mole Balance
  23. 30. General Mole Balance
  24. 31. Batch Reactor Mole Balance
  25. 32. CSTR Mole Balance
  26. 33. Plug Flow Reactor
  27. 34. Plug Flow Reactor Mole Balance PFR: The integral form is: This is the volume necessary to reduce the entering molar flow rate (mol/s) from F A0 to the exit molar flow rate of F A .
  28. 35. Packed Bed Reactor Mole Balance PBR The integral form to find the catalyst weight is:
  29. 36. Reactor Mole Balance Summary
  30. 37. Fast Forward to the Future <ul><li>Thursday March 20 th , 2008 </li></ul><ul><li>Reactors with Heat Effects </li></ul>
  31. 38. Production of Propylene Glycol in an Adiabatic CSTR
  32. 39. What are the exit conversion X and exit temperature T? Solution Let the reaction be represented by
  33. 48. KEEPING UP
  34. 49. Separations These topics do not build upon one another Filtration Distillation Adsorption
  35. 50. Reaction Engineering These topics build upon one another Mole Balance Rate Laws Stoichiometry
  36. 51. Mole Balance Rate Laws Stoichiometry Isothermal Design Heat Effects
  37. 52. Mole Balance Rate Laws
  38. 53. Mole Balance Rate Laws Stoichiometry Isothermal Design Heat Effects
  39. 62. Batch Reactor Mole Balance
  40. 63. Batch Reactor Mole Balance
  41. 64. Batch Reactor Mole Balance
  42. 65. Batch Reactor Mole Balance
  43. 66. Batch Reactor Mole Balance
  44. 67. Continuously Stirred Tank Reactor Mole Balance
  45. 68. Continuously Stirred Tank Reactor Mole Balance
  46. 69. Continuously Stirred Tank Reactor Mole Balance
  47. 70. C S T R Mole Balance
  48. 71. CSTR Mole Balance
  49. 72. Plug Flow Reactor
  50. 73. Plug Flow Reactor Mole Balance PFR:
  51. 74. Plug Flow Reactor Mole Balance PFR:
  52. 75. Plug Flow Reactor Mole Balance PFR:
  53. 76. Plug Flow Reactor Mole Balance PFR:
  54. 77. Plug Flow Reactor Mole Balance PFR:
  55. 78. Plug Flow Reactor Mole Balance PFR: The integral form is:
  56. 79. Plug Flow Reactor Mole Balance PFR: The integral form is: This is the volume necessary to reduce the entering molar flow rate (mol/s) from F A0 to the exit molar flow rate of F A .
  57. 80. Packed Bed Reactor Mole Balance PBR
  58. 81. Packed Bed Reactor Mole Balance PBR
  59. 82. Packed Bed Reactor Mole Balance PBR
  60. 83. Packed Bed Reactor Mole Balance PBR
  61. 84. Packed Bed Reactor Mole Balance PBR The integral form to find the catalyst weight is:
  62. 85. Reactor Mole Balance Summary
  63. 86. Reactor Mole Balance Summary
  64. 87. Reactor Mole Balance Summary
  65. 88. Reactor Mole Balance Summary
  66. 98. Chemical Reaction Engineering Asynchronous Video Series Chapter 1: General Mole Balance Equation Applied to Batch Reactors, CSTRs, PFRs, and PBRs H. Scott Fogler, Ph.D.
  67. 99. http://www.engin.umich.edu/~cre
  68. 106. Chemical Reaction Engineering <ul><li>Chemical reaction engineering is at the heart of virtually every chemical process. It separates the chemical engineer from other engineers. </li></ul><ul><li>Industries that Draw Heavily on Chemical Reaction Engineering (CRE) are: </li></ul><ul><li>CPI (Chemical Process Industries) </li></ul><ul><li>Dow, DuPont, Amoco, Chevron </li></ul><ul><li>Pharmaceutical – Antivenom, Drug Delivery </li></ul><ul><li>Medicine – Tissue Engineering, Drinking and Driving </li></ul>
  69. 107. Compartments for perfusion Perfusion interactions between compartments are shown by arrows. V G , V L , V C , and V M are -tissue water volumes for the gastrointestinal, liver, central and muscle compartments, respectively. V S is the stomach contents volume. Stomach V G = 2.4 l Gastrointestinal V G = 2.4 l t G = 2.67 min Liver Alcohol V L = 2.4 l t L = 2.4 min Central V C = 15.3 l t C = 0.9 min Muscle & Fat V M = 22.0 l t M = 27 min
  70. 109. Chemical Reaction Engineering <ul><li>Chemical reaction engineering is at the heart of virtually every chemical process. It separates the chemical engineer from other engineers. </li></ul><ul><li>Industries that Draw Heavily on Chemical Reaction Engineering (CRE) are: </li></ul><ul><li>CPI (Chemical Process Industries) </li></ul><ul><li>Dow, DuPont, Amoco, Chevron </li></ul><ul><li>Pharmaceutical – Antivenom, Drug Delivery </li></ul><ul><li>Medicine –Pharmacokinetics, Drinking and Driving </li></ul><ul><li>Microelectronics – CVD </li></ul>
  71. 110. Reaction Rate Consider the isomerization A  B r A = the rate of formation of species A per unit volume
  72. 111. Reaction Rate Consider the isomerization A  B r A = the rate of formation of species A per unit volume -r A = the rate of a disappearance of species A per unit volume
  73. 112. Reactor Mole Balance Summary
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