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 high temperature should be used throughout the reaction
None of these
Very low temperature should be used throughout the reaction

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Chemical Reaction Engineering
A space time of 3 hours for a flow reactor means that

The time required to process one reactor volume of feed (measured at specified conditions) is 3 hours
Three reactor volumes of feed can be processed every hour
It takes three hours to dump the entire volume of the reactor with feed
Conversion is cent per cent after three hours

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