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Assume that the solvent, and component A are contained in separate tanks; sketch the extra equipment which would have to be added to Figure 3.1 in order to achieve the desired value of CA0. |
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| Study Questions | Apply Your Knowledge |
| 3.8 An extension of Textbook mixing tank Example 3.1 |
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Assume that the solvent, and component A are contained in separate tanks; sketch the extra equipment which would have to be added to Figure 3.1 in order to achieve the desired value of CA0. |
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| 3.9 An extension of Textbook CSTR Example 3.2 |
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The dynamic response of a continuous-flow stirred-tank reactor was determined in this example. Describe the effect on Kp and t when the temperature is increased so that the rate constant, k is doubled. |
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| 3.10 An extension of Textbook series CSTRs Example 3.3 |
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From the derived model of the two isothermal CSTR reactors in series, which variable CA1 or CA2, responds faster to a step change in CA0. Why is this the case? |
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| 3.11 An extension of Textbook Example 3.4 |
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Consider the performance of an on-off residential heating system, in which feedback control is used to monitor and control the temperature. What would be the effect on the dynamic behavior if: |
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ii. the room were insulated? |
| 3.12 An extension of Textbook Example 3.5 |
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Consider an isothermal CSTR, with a second order chemical reaction. Under what scenarios is the linearized model likely to be very accurate? |
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| 3.13 An extension of Textbook draining tank level Example 3.6 |
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At first glance, there appears to be an error in Figure 3.14 b. How can the linearized model predict a negative level in a tank? |
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| 3.14 An extension of Textbook Example 3.7 |
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In a stirred-tank heat exchanger, what would the effect be on Kp and t if: |
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by 50%?
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| ii The flow into the tank was
increased by 50%?
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| 3.15 An extension of Textbook Example 3.9 |
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To obtain a very accurate numerical solution, should we use a very small Dt? Say for instance 10-8 min.
| 3.16 An extension of exothermic CSTR Example 3.10 |
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In exothermic CSTR's, as the temperature increases, the reaction rate increases. This rise in reaction rate induces an increased conversion of energy from chemical potential to sensible energy. As a result, the temperature increases further. Given this tendency, why does the temperature reach steady state? |
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