Chemical Reaction Engineering
Promoter.

Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals
All of these
Atlers the position of equilibrium in a reversible reaction
Initiates a chemical reaction and is a catalyst by itself

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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

7
3
6
44015

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Chemical Reaction Engineering
Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor?

Temperature should be high in the beginning and decreased towards the end of the reaction
Very low temperature should be used throughout the reaction
Very high temperature should be used throughout the reaction
None of these

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