Design of Sieve tray Column for Removal of Ammonia from Khartoum Refinery Sour Gas

Abstract

Many commercial processes are available for the removal of ammonia (NH3) from gaseous streams. The presence of NH3 in refinery flue gas caused dangerous effect on the environment. Hence, NH3 was removed from the refinery sour gas, and the relievable mechanism of mass transfer with chemical reactions in a sieve tray column have to be studied. In this study, the chemical absorption of ammonia into aqueous hydrochloric acid solution (HCl) has been studied, and design calculations for sieve tray column have been done and the effective operation parameters on this process have been investigated. This study assumed steady state and isothermal conditions and sieve tray column operated counter-currently. In the system studied the refinery sour gas flow rate was, 2.401ton/h, liquid flow rate was 10000 cm3/s, pressure P is 1atm, temperature 30oC and the concentration of HCl in inlet absorbent was 0.002 mol/cm3 , and ammonia in a sour gas of 49.59%mol. This study discussing the steps of designing the sieve tray column; and determine or how to design the column diameter 0.7 m, column height 9.4 m, and number of trays 16