Analyze the following statement: An adiabatic CSTR usually gives a shorter residence time than a PFTR...
Analyze the following statement: An adiabatic CSTR usually gives
a shorter residence time
than a PFTR for the same conversion.
Homework Answers
For the same conversion, it depends on the order of the reaction:
For positive order reactions: PFR will always give a shorter residence time compared to CSTR
For negative order reactions: CSTR will always give a shorter residence time compared to PFR
For zero order reactions: the residence time doesn't affect the conversions.
In simple words, if the order is positive, then rate of reaction depends upon the concentration directly, so higher the concentration of the reactant in the system it will be better. Similarly, if the order is negative there will be an inverse relation between concentration and rate of reaction. Since PFR decreases the concentration gradually, at any instant or any location in the reactor, the concentration is always higher than that found in a CSTR. Therefore, a PFR is suitable for positive order reactions.
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Please make sure you get the same answers as written and
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Thanks in advance
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Identify each statement as true or false.
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TrueFalse
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Please make sure you get the same answers as written and
solve all the parts
Thanks in advance
3. The elementary gas-phase reaction A → B + 2C gives a rate constant of 10-4 min-1 at 50°C and has an activation energy of 85 kJ mol1. This reaction is carried out in a flow reactor that is operated isothermally at 127 °C with a negligible pressure drop. The reactor feed is pure A, entering at 127 °C and...
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Exercise 11-2
Andrea has prepared the following list of statements about
corporations.
Identify each statement as true or false.
1.
Corporation management is both an advantage and a disadvantage
of a corporation compared to a proprietorship or a
partnership.
TrueFalse
2.
Limited liability of stockholders, government regulations, and
additional taxes are the major disadvantages of a corporation.
TrueFalse
3.
When a corporation is formed, organization costs are recorded
as an asset.
TrueFalse
4.
Each share of common stock gives the...
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