Fertiliser Technology
Fertiliser plant making ammonium sulphate employing gypsum-ammonia reaction (usual practice is to use ammonia and sulphuric acid) is located at

Bokaro (under SAIL)
Sindri (under FCI)
Rourkela (under SAIL)
Baroda (under G.S.F.C.)

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Fertiliser Technology
Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature

Very high pressure is required resulting in costly pressure vessel
Space velocity of gas is very low resulting in decreased conversion
None of these
Rate of reaction is very low

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Fertiliser Technology
I argest capacity nitrogenous fertiliser plants (2700 tons of NH₃ per day) (2 Nos) in India are located at

Talchar (Orissa) and Ramagundam (A.P.) both under FCI
Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat)
Korba (M.P.) and Talchar (Orissa) both under FCI
Haldia (W.B) and Namrup (Assam) both under HFC

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