Chemical Reaction Engineering
Fluidised bed reactor is characterised by

Uniformity of temperature
Very small pressure drop
Absence of continuous catalyst regeneration facility
Comparatively smaller equipment

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

τ = θ , for a non-isothermal 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 , when the fluid density changes in the reactor

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