Chemical Reaction Engineering
In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for

Slow reactions in catalyst of large pore diameter
Slow reactions in catalyst of small pore diameter
Fast reactions in catalyst of small pore diameter
Fast reaction in catalyst of large pore diameter

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Chemical Reaction Engineering
A space velocity of 5 hr⁻¹ means that

Five reactor volumes of feed (at specified conditions) are being fed into the reactor per hour
Cent per cent conversion can be achieved in at least 5 hours
A fixed conversion of a given batch of feed takes 5 hours
After every 5 hours, reactor is being filled with the feed

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

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

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