Urea is produced in the form of a concentrated aqueous solution with a composition of 20 mol/L. The product obtained is then solidified and later packaged and sold as fertilizer. However, urea in aqueous form condenses, forming diurea: 2 NH2CONH2 → NH2CONHCONH2 + NH3What is the allowable time to delay the transformation of liquid urea into solid product at 80°C, so that the amount of diurea is less than 3%? It is known that the rate constant of the condensation reaction is 2.38x10 -5L/mol.h and the reaction is carried out in a constant volume BSTR.R: ~134 h

The order of the reaction is to be determined initially. To determine the order of the reaction, the…

Answered: Urea is produced in the form of a…

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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Urea is produced in the form of a concentrated aqueous solution with a composition of 20 mol/L. The product obtained is then solidified and later packaged and sold as fertilizer. However, urea in aqueous form condenses, forming diurea:
2 NH₂CONH₂ → NH₂CONHCONH₂ + NH₃
What is the allowable time to delay the transformation of liquid urea into solid product at 80°C, so that the amount of diurea is less than 3%? It is known that the rate constant of the condensation reaction is 2.38x10 ^-5L/mol.h and the reaction is carried out in a constant volume BSTR.

R: ~134 h

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