7/28/2019 Comparison selection of Urea production process

1/1

Mitsu Toatsu

Description Mitsu Toatsu Stamicarbon Snamprogetti

Feed NH 3 + CO 2 NH3 + CO 2NH3 + CO2

Reactor Temperature 195C

Reactor Pressure 169.4 atm (175kg/cm)

Energy NA Average energy in

stripping process is 0.8-1.0

ton of steam per ton of

ammonia.

21-23 kwh/tb

CO2 conversion inreactor

87% 60% 64%

NH3 conversion inreactor

70% 36% 41%

CO2 conversion insynthesis

NA 79% 84%

NH3 conversion insynthesis

NA 79% 47%

Recirculation stages 1 NA 2

Price NANA NA

Molar NH3/CO2 ratio 2.80 2.95 3.3-3.6

Molar H20/CO2 ratio 0.50 0.39 0.5-0.6

Steam consumption 25 kg/cm 0.92t/b (?) 0.950t/b

Urea recovery The reactor effluentcontains about 80%of urea.

Urea from recirculationstage contains 75 wt%urea. After decomposition-recovery, evaporation 99.7% urea melt isproduced

25% Urea+biuret;60%formaldehyde;15% water

*NA Information not available