Chemical Reaction Engineering
A trickle bed reactor is the one, which

Processes three reactants at different flow rates
Has altogether three streams either entering or leaving
Processes three reactants with same flow rate
Employs all the three phases (i.e.. .solid, liquid and gas)

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Chemical Reaction Engineering
The reactions of high molecularity are rare, because

Of low probability of many body collisions
Of very large activation energy of many bodies
Many body collisions are not favoured energetically
Of requirement of very large concentration for such reactions

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Chemical Reaction Engineering
For a heterogeneous catalytic reaction

The surface of the catalyst does not play an important role during reaction
A relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important
Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction
The catalyst does not form an intermediate complex with the reactant

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Chemical Reaction Engineering
A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m³ and volumetric flow rate 1m³ /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m³ . The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 kmole/m³ , the volume of the mixed flow reactor should be increased by a factor of

3
7
6
44015

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