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Chemical Reaction Engineering

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Chemical Reaction Engineering

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  1. Chemical Reaction Engineering Chapter 3, Part 4: Reaction Stoichiometry Measures Other Than Conversion

  2. Measures Other Than Conversion Uses: A. Membrane reactors B. Multiple reaction Liquids: Use concentrations, i.e., CA

  3. Measures Other Than Conversion Uses: A. Membrane reactors • B. Multiple reaction • Liquids: Use concentrations, i.e., CA • For the elementary liquid phase reaction carried out in a CSTR, where V, vo,CAo,k, and Kc are given and the feed is pure A, the combined mole balance, rate laws, and stoichiometry are:

  4. Measures Other Than Conversion Uses: A. Membrane reactors • B. Multiple reaction Liquids: Use concentrations, i.e., CA • For the elementary liquid phase reaction carried out in a CSTR, where V, vo,CAo,k, and Kc are given and the feed is pure A, the combined mole balance, rate laws, and stoichiometry are:

  5. Measures Other Than Conversion Uses: A. Membrane reactors • B. Multiple reaction Liquids: Use concentrations, i.e., CA • For the elementary liquid phase reaction carried out in a CSTR, where V, vo,CAo,k, and Kc are given and the feed is pure A, the combined mole balance, rate laws, and stoichiometry are:

  6. Measures Other Than Conversion Uses: A. Membrane reactors • B. Multiple reaction Liquids: Use concentrations, i.e., CA • For the elementary liquid phase reaction carried out in a CSTR, where V, vo,CAo,k, and Kc are given and the feed is pure A, the combined mole balance, rate laws, and stoichiometry are:

  7. Measures Other Than Conversion

  8. Measures Other Than Conversion

  9. Measures Other Than Conversion 2. There are two equations, two unknowns, CA and CB

  10. Measures Other Than Conversion • Gases: Use molar flow rates, i.e., FI

  11. Measures Other Than Conversion • Gases: Use molar flow rates, i.e., FI

  12. Measures Other Than Conversion • Gases: Use molar flow rates, i.e., FI

  13. Measures Other Than Conversion • Gases: Use molar flow rates, i.e., FI

  14. Measures Other Than Conversion • Gases: Use molar flow rates, i.e., FI If the above reaction, ,carried out in the gas phase in a PFR, where V, vo,CAo,k, and Kc are given and the feed is pure A, the combined mole balance, rate laws, and stoichiometry yield, for isothermal operation (T=To) and no pressure drop (DP=0) are:

  15. Measures Other Than Conversion • Gases: Use molar flow rates, i.e., FI If the above reaction, ,carried out in the gas phase in a PFR, where V, vo,CAo,k, and Kc are given and the feed is pure A, the combined mole balance, rate laws, and stoichiometry yield, for isothermal operation (T=To) and no pressure drop (DP=0) are:

  16. Measures Other Than Conversion • Gases: Use molar flow rates, i.e., FI If the above reaction, ,carried out in the gas phase in a PFR, where V, vo,CAo,k, and Kc are given and the feed is pure A, the combined mole balance, rate laws, and stoichiometry yield, for isothermal operation (T=To) and no pressure drop (DP=0) are: Use Polymath to plot FA and FB down the length of the reactor.

  17. Measures Other Than Conversion Given: Use Polymath to plot FA and FB down the length of the reactor.

  18. Measures Other Than Conversion Given: Use Polymath to plot FA and FB down the length of the reactor. FA FB V

  19. Summary At the start of the chapter we saw we needed -rA=f(X). This result is achieved in two steps.

  20. Summary At the start of the chapter we saw we needed -rA=f(X). This result is achieved in two steps. • Rate Laws • -rA=k f(Ci) • 1st order A--> B or 1st order -rA=kCA

  21. Summary At the start of the chapter we saw we needed -rA=f(X). This result is achieved in two steps. • Rate Laws • -rA=k f(Ci) • 1st order A--> B or 1st order • 2nd order A+B --> C • Rate laws are found by experiment -rA=kCA -rA=kACACB

  22. Summary At the start of the chapter we saw we needed -rA=f(X). This result is achieved in two steps. • Rate Laws • -rA=k f(Ci) • 1st order A--> B or 1st order • 2nd order A+B --> C • Rate laws are found by experiment • Stoichiometry • Liquid: • Gas: -rA=kCA -rA=kACACB