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An engineer is considering the economics of including a recycle stream in the process shown below. In the first scenario, is the process with recycle and the second without recycle. For both scenarios, the feed is 100 g/s and contains components A (90%) and N (10%), where N is an inert component. In the reactor, A is converted to B but only partially. The ratio of the concentrations of A to B at the reactor outlet is 3:1. Unreacted A is separated from B. The separation at the separator is assumed ideal; where all of the components A and N separate to B. In the first scenario, the separated stream, containing A and N, is recycled back and mixed with the incoming stream. However, because of the presence of N, a purge must drawn from the same recycle stream and with a cost of a loss of A equal to 9 g/s. In the second scenario, there is no recycle and the separated stream, containing A and N, is allowed to be wasted. Calculate the difference in yield of scenarios 1 and 2. Yield is defined as grams B/grams A fed for both scenarios. Scenario 1 Scenario 2 Purge Waste 100 g/s 100 g/s 90% A 90% A Reactor Separator Product Reactor Separator Product 10% N B 10% N B

An engineer is considering the economics of including a recycle stream in the process shown below. In the first scenario, is the process with recycle and the second without recycle. For both scenarios, the feed is 100 g/s and contains components A (90%) and N (10%), where N is an inert component. In the reactor, A is converted to B but only partially. The ratio of the concentrations of A to B at the reactor outlet is 3:1. Unreacted A is separated from B. The separation at the separator is assumed ideal; where all of the components A and N separate to B. In the first scenario, the separated stream, containing A and N, is recycled back and mixed with the incoming stream. However, because of the presence of N, a purge must drawn from the same recycle stream and with a cost of a loss of A equal to 9 g/s. In the second scenario, there is no recycle and the separated stream, containing A and N, is allowed to be wasted. Calculate the difference in yield of scenarios 1 and 2. Yield is defined as grams B/grams A fed for both scenarios. Scenario 1 Scenario 2 Purge Waste 100 g/s 100 g/s 90% A 90% A Reactor Separator Product Reactor Separator Product 10% N B 10% N B

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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An engineer is considering the economics of including a recycle stream in the process shown below. In the first scenario, is the process with recycle and the second without recycle. For both scenarios, the feed is 100 g/s and contains components A (90%) and N (10%), where N is an inert component. In the reactor, A is converted to B but only partially. The ratio of the concentrations of A to B at the reactor outlet is 3:1. Unreacted A is separated from B. The separation at the separator is assumed ideal; where all of the components A and N separate to B. In the first scenario, the separated stream, containing A and N, is recycled back and mixed with the incoming stream. However, because of the presence of N, a purge must drawn from the same recycle stream and with a cost of a loss of A equal to 9 g/s. In the second scenario, there is no recycle and the separated stream, containing A and N, is allowed to be wasted. Calculate the difference in yield of scenarios 1 and 2. Yield is defined as grams B/grams A fed for both scenarios. Scenario 1 Scenario 2 Purge Waste 100 g/s 90% A 100 g/s 90% A Reactor Separator Product Reactor Separator Product 10% N 10% N
Transcribed Image Text:An engineer is considering the economics of including a recycle stream in the process shown below. In the first scenario, is the process with recycle and the second without recycle. For both scenarios, the feed is 100 g/s and contains components A (90%) and N (10%), where N is an inert component. In the reactor, A is converted to B but only partially. The ratio of the concentrations of A to B at the reactor outlet is 3:1. Unreacted A is separated from B. The separation at the separator is assumed ideal; where all of the components A and N separate to B. In the first scenario, the separated stream, containing A and N, is recycled back and mixed with the incoming stream. However, because of the presence of N, a purge must drawn from the same recycle stream and with a cost of a loss of A equal to 9 g/s. In the second scenario, there is no recycle and the separated stream, containing A and N, is allowed to be wasted. Calculate the difference in yield of scenarios 1 and 2. Yield is defined as grams B/grams A fed for both scenarios. Scenario 1 Scenario 2 Purge Waste 100 g/s 90% A 100 g/s 90% A Reactor Separator Product Reactor Separator Product 10% N 10% N
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