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The conversion attainable for the following reaction is typically around 15%. As a consequence, in the production of ammonia unreacted H2 and N2 are recycled. N2 + 3 H2 = 2 NH3 The ammonia produced is separated condensed from the reaction mixture by condensation (see diagram). The feed contains argon (from the N2 production process). To avoid accumulation of argon in the system, a purge stream is used. Recycle N2 H2 Ar Purge N2 H2 A Feed N2 H2 reactor condenser Ar Product NH, The mol fraction of argon in the feed is 0.012 and the mol fraction of argon in the recycle stream has to be kept at 0.279. 1. Calculate the purge rate required (see note). Enter your answer below. 2. Clearly identify the control volume/s on which you are doing the mass balance. 3. Do a degree of freedom analysis on the control volume/s you solve. 4. State all assumptions in your working.

The conversion attainable for the following reaction is typically around 15%. As a consequence, in the production of ammonia unreacted H2 and N2 are recycled. N2 + 3 H2 = 2 NH3 The ammonia produced is separated condensed from the reaction mixture by condensation (see diagram). The feed contains argon (from the N2 production process). To avoid accumulation of argon in the system, a purge stream is used. Recycle N2 H2 Ar Purge N2 H2 A Feed N2 H2 reactor condenser Ar Product NH, The mol fraction of argon in the feed is 0.012 and the mol fraction of argon in the recycle stream has to be kept at 0.279. 1. Calculate the purge rate required (see note). Enter your answer below. 2. Clearly identify the control volume/s on which you are doing the mass balance. 3. Do a degree of freedom analysis on the control volume/s you solve. 4. State all assumptions in your working.

Introduction to Chemical Engineering Thermodynamics
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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Note: The purge rate is the ratio between the molar flow rate of the purge stream and the molar flow rate of the feed.
The conversion attainable for the following reaction is typically around 15%. As a consequence, in the production of ammonia unreacted H2 and N2 are recycled. N2 + 3 H2 = 2 NH3 The ammonia produced is separated condensed from the reaction mixture by condensation (see diagram). The feed contains argon (from the N2 production process). To void accumulation of argon in the system, a purge stream is used. Recycle N2 H2 Ar Purge N, H2 A Feed N2 H, reactor condenser Ar Product NH, The mol fraction of argon in the feed is 0.012 and the mol fraction of argon in the recycle stream has to be kept at 0.279. 1. Calculate the purge rate required (see note). Enter your answer below. 2. Clearly identify the control volume/s on which you are doing the mass balance. 3. Do a degree of freedom analysis on the control volume/s you solve. 4. State all assumptions in your working.
Transcribed Image Text:The conversion attainable for the following reaction is typically around 15%. As a consequence, in the production of ammonia unreacted H2 and N2 are recycled. N2 + 3 H2 = 2 NH3 The ammonia produced is separated condensed from the reaction mixture by condensation (see diagram). The feed contains argon (from the N2 production process). To void accumulation of argon in the system, a purge stream is used. Recycle N2 H2 Ar Purge N, H2 A Feed N2 H, reactor condenser Ar Product NH, The mol fraction of argon in the feed is 0.012 and the mol fraction of argon in the recycle stream has to be kept at 0.279. 1. Calculate the purge rate required (see note). Enter your answer below. 2. Clearly identify the control volume/s on which you are doing the mass balance. 3. Do a degree of freedom analysis on the control volume/s you solve. 4. State all assumptions in your working.
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