In the famous Haber process to manufacture ammonia, the reaction is carried out at pressures of 800 to 1000 atm and at 500°C to 600°C using a suitable catalyst. Only a small fraction of the material entering the reactor reacts on one pass, so recycle is needed. Also, because the nitrogen is obtained from the air, it contains almost 1% rare gases (chiefly argon) that do not react. The rare gases would continue to build up in the recycle until their effect on the reaction equilibrium became adverse, so a small purge stream is used. 3H₂ + N₂ N₂ H₂ Ar Reactor N₂, H₂, Ar <-2NH3 Separator NH3 (Liquid) (a) How many moles are recycled and purged? (b) What is the percent conversion of hydrogen per pass? (c) What is the overall conversion of hydrogen? Purge (Gas) fresh feed of gas composed 75.16mol% H₂, 57% N2, and 0.27% Ar mixed with the recycled gas and enters the reactor with a composition of 79.52% H₂. The gas stream leaving the ammonia separator contains 80.01% H₂ and no ammonia. The product ammonia contains no dissolved I gases. Per 100 moles of fresh feed:
In the famous Haber process to manufacture ammonia, the reaction is carried out at pressures of 800 to 1000 atm and at 500°C to 600°C using a suitable catalyst. Only a small fraction of the material entering the reactor reacts on one pass, so recycle is needed. Also, because the nitrogen is obtained from the air, it contains almost 1% rare gases (chiefly argon) that do not react. The rare gases would continue to build up in the recycle until their effect on the reaction equilibrium became adverse, so a small purge stream is used. 3H₂ + N₂ N₂ H₂ Ar Reactor N₂, H₂, Ar <-2NH3 Separator NH3 (Liquid) (a) How many moles are recycled and purged? (b) What is the percent conversion of hydrogen per pass? (c) What is the overall conversion of hydrogen? Purge (Gas) fresh feed of gas composed 75.16mol% H₂, 57% N2, and 0.27% Ar mixed with the recycled gas and enters the reactor with a composition of 79.52% H₂. The gas stream leaving the ammonia separator contains 80.01% H₂ and no ammonia. The product ammonia contains no dissolved I gases. Per 100 moles of fresh feed:
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
Related questions
Question
Transcribed Image Text:In the famous Haber process to manufacture ammonia, the reaction is carried out at pressures of
800 to 1000 atm and at 500°C to 600°C using a suitable catalyst. Only a small fraction of the
material entering the reactor reacts on one pass, so recycle is needed. Also, because the nitrogen
is obtained from the air, it contains almost 1% rare gases (chiefly argon) that do not react. The
rare gases would continue to build up in the recycle until their effect on the reaction equilibrium
became adverse, so a small purge stream is used.
N₂
H₂
Ar
3H₂ + N₂
Reactor
N₂, H₂, Ar
-2NH3
Separator
-NH3 (Liquid)
(a) How many moles are recycled and purged?
(b) What is the percent conversion of hydrogen per pass?
(c) What is the overall conversion of hydrogen?
Purge (Gas)
The fresh feed of gas composed of 75.16mol% H₂, 24.57% N2, and 0.27% Ar is mixed with the
recycled gas and enters the reactor with a composition of 79.52% H₂. The gas stream leaving the
ammonia separator contains 80.01% H₂ and no ammonia. The product ammonia contains no
dissolved gases. Per 100 moles of fresh feed:
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 5 images
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The