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Chemical Reaction Engineering

Chemical Reaction Engineering
The vessel dispersion number (D/μL) for plug flow is

750
500
∞

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Chemical Reaction Engineering
If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.

T ∝ 1/an + 1
T ∝ 1/an
T ∝ 1/an - 1
T ∝ an

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Chemical Reaction Engineering
An isothermal aqueous phase reversible reaction, P ⇋ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m³ .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the

0.80
1.33
1.60
2.67

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Chemical Reaction Engineering
For a tubular flow reactor with uniform concentration and temperature, the independent variable is

Time
Diameter
None of these
Length

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Chemical Reaction Engineering
A pulse tracer is introduced in an ideal CSTR (with a mean residence time ι) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be

τ/0.693
0.693τ
0.5τ
2τ

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Chemical Reaction Engineering
Shift conversion reaction

Converts CO to CO₂ with steam
Is highly exothermic
Converts N₂ and H₂ into NH₃
Is non-catalytic

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