Fertiliser Technology
Fauser Monte Catini converter is used for

Ammonia synthesis (e.g. at FCI Sindri)
Methanation of CO and CO₂
Shift conversion (i.e. CO to CO₂)
None of these

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Fertiliser Technology
Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of

Higher pumping cost
High cost of the high pressure vessel used for the reactor
Comparatively higher pressure drop
Chances of entrainment and disturbance of catalyst bed

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