The modes for thermal reactor operations

See a slide (for a TFR)!

mode behaviour  problems advantages
isothermal reaction mass 'forced' to const. temp. by heat exchange or convective flow difficult controlling (rem: parametric sensitivity in TFRs) easy reactor design
adiabatic no heat exchange with the surrounding, heat can only be 'removed' by convective flow in continuous reactors too high heat production
a bit more difficult reactor design
no pretentious controlling, only emergency shutdown
polytropic running some sort of 'temperature program' by controlling or 'autothermal conduction' difficult reactor design and possibly controlling good adaption in zones

see a blackbord sketch of the various possibilities for the 3 basic reactor types

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