Chemical Reaction Engineering
For a tubular reactor with space time 'τ' and residence time 'θ', the following statement holds good.

τ = θ , when the fluid density changes in the reactor
τ = θ , for an isothermic tubular reactor in which the density of the process fluid is constant
τ and θ are always equal
τ = θ , for a non-isothermal reactor

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Chemical Reaction Engineering
The optimum performance for reactors operating in parallel is obtained when the feed stream is distributed in such a way, that the

None of these
Space time for each parallel line is same
Larger reactors have more space time compared to smaller ones
Space time for parallel lines is different

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