Chemical Reaction Engineering
Which of the following is the most suitable for very high pressure gas phase reaction?

Batch reactor
Fluidised bed reactor
Stirred tank reactor
Tubular flow reactor

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Chemical Reaction Engineering
Mean residence time is equal to the space time, when

All of these
The temperature, pressure and the density of reaction mixture remains constant throughout the reactor
There is no change in number of moles in gaseous reaction
The feed rate is measured at temperature and pressure in the reactor

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