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Study on the Production of Urea by Snam Ammonia Stripping Process and Stami Carbon Dioxide Stripping Process

Author(s):

Alok Sahu , Dr.Aith Kanpur; Rohit Kumar Yadav, Dr.Aith Kanpur; Rajesh Kr. Verma, Dr.Aith Kanpur; Ashutosh Mishra, Dr.Aith Kanpur; Shivangi Nigam, Dr.Aith Kanpur

Keywords:

Urea, Snam Ammonia Stripping Process and Stami Carbon Dioxide Stripping Process, Biuret

Abstract

Urea is the most convenient form for fixed nitrogen. Urea has the highest nitrogen content available in a solid fertilizer (46 %) [NFL-Guna (M.P),Plant data]. It is easy to produce as prills or granules and easily transported in bulk or bags with no explosive hazard. It leaves no salt residue after use on crops. Its specific gravity is 1.335[ Dryden’s Outlines of chemical technology, 3rd-edition.New Delhi:Affiliated East west press private Limited,2004], decomposes on boiling point and is fairly soluble in water. The principal raw materials required for this purpose are NH3 & CO2.Two reactions are involved in the formation of urea. In first step carbon dioxide and ammonia is reacted at high pressure to form ammonia carbamate. This reaction is highly exothermic [Pozin M E. Fertilizer Manufacture. Moscow: Khimia, 1974]. CO2 + 2NH3 NH2COONH4 ∆H= -37.4 Kcal In the second step decomposition of ammonia carbamate has been taken place and this reaction is endothermic in nature. NH2COONH4 NH2CONH2 + H2O ∆H= + 6.3 Kcal

Other Details

Paper ID: IJSRDV7I30129
Published in: Volume : 7, Issue : 3
Publication Date: 01/06/2019
Page(s): 198-201

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