2. Urea solution is applied to generate ammonia under pressure and high temperature for de-NOx system. The reactions are: NH,CONH2 + H2O <=> NH,COONH4 NH2COONH4 <=> 2 NH3 +CO2 The overall reaction is endothermic, pressure 5~10 bar, 140~180 C. The urea to ammonia system needs to adjust the production rate according to the de-NOx system demand. The operation is continuous. A vessel is used as the reactor. Steam tubes are inside for heating. List all controlled variables and manipulated variables. Design your control loops on the diagram. Product gas (NH3, CO2, H2O) Urea solution feed Steam input Condensate out
2. Urea solution is applied to generate ammonia under pressure and high temperature for de-NOx system. The reactions are: NH,CONH2 + H2O <=> NH,COONH4 NH2COONH4 <=> 2 NH3 +CO2 The overall reaction is endothermic, pressure 5~10 bar, 140~180 C. The urea to ammonia system needs to adjust the production rate according to the de-NOx system demand. The operation is continuous. A vessel is used as the reactor. Steam tubes are inside for heating. List all controlled variables and manipulated variables. Design your control loops on the diagram. Product gas (NH3, CO2, H2O) Urea solution feed Steam input Condensate out
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:2. Urea solution is applied to generate ammonia under pressure and high temperature for de-NOx
system. The reactions are:
NH,CONH2 + H2O <=> NH2COONH4
NH,COONH4 <=> 2 NH3 +CO2
The overall reaction is endothermic, pressure 5~10 bar, 140~180 C. The urea to ammonia system needs
to adjust the production rate according to the de-NOx system demand. The operation is continuous. A
vessel is used as the reactor. Steam tubes are inside for heating.
List all controlled variables and manipulated variables. Design your control loops on the diagram.
Product gas (NH3, CO2, H2O)
Urea solution feed
Steam input
Condensate out
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