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

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

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Chemical Reaction Engineering
Space velocity

All of these
Is a measure of the ease of the reaction
Is the maximum feed rate pre unit volume of reactor for a given conversion
Describes the extensive operating characteristics of a tubular flow reactor

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