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Calculate (a) Overall conversion of N2. (b) The ratio (moles purge gas/mole of gas leaving the condenser) (c) The ratio (moles fresh feed/mole fed to the reactor)

Calculate (a) Overall conversion of N2. (b) The ratio (moles purge gas/mole of gas leaving the condenser) (c) The ratio (moles fresh feed/mole fed to the reactor)

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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Q 3) The fresh feed to an NH3 production (Figure Q3) process contains 24.75 mole % N2, 74.25 mole % H2 and the balance inert gas (I). The feed is combined with a recycle stream containing the same species, and the combined stream is fed to a reactor in which a 35% single-pass conversion of N2 is achieved. The products pass through a condenser in which essentially all of the NH; is removed, and the remaining gases are recycled. However, to prevent buildup of the inert compounds in the system, a purge stream must be taken off. The recycle stream contains 15.0 mole% inert gas. ng(mol recycled) n;(mol purged) 0.15 I x N2 0.85 - x H3 0.15 I n3 (mol. I) n4 (mol N;) ns (mol H3) x N2 0.85 -x H; 100 mol Reactor Condenser 0.2475 N. 0.7425 H; ni (mol N2) n: (mol H2) n; (mol I) n4 (mol N2) ns (mol H2) ns (mol NH3) n3 (mol I) ns (mol NH3) 0.0100 I Figure Q3: Ammonia production flowchart Calculate (a) Overall conversion of N2. (b) The ratio (moles purge gas/mole of gas leaving the condenser) (c) The ratio (moles fresh feed/mole fed to the reactor)
Transcribed Image Text:Q 3) The fresh feed to an NH3 production (Figure Q3) process contains 24.75 mole % N2, 74.25 mole % H2 and the balance inert gas (I). The feed is combined with a recycle stream containing the same species, and the combined stream is fed to a reactor in which a 35% single-pass conversion of N2 is achieved. The products pass through a condenser in which essentially all of the NH; is removed, and the remaining gases are recycled. However, to prevent buildup of the inert compounds in the system, a purge stream must be taken off. The recycle stream contains 15.0 mole% inert gas. ng(mol recycled) n;(mol purged) 0.15 I x N2 0.85 - x H3 0.15 I n3 (mol. I) n4 (mol N;) ns (mol H3) x N2 0.85 -x H; 100 mol Reactor Condenser 0.2475 N. 0.7425 H; ni (mol N2) n: (mol H2) n; (mol I) n4 (mol N2) ns (mol H2) ns (mol NH3) n3 (mol I) ns (mol NH3) 0.0100 I Figure Q3: Ammonia production flowchart Calculate (a) Overall conversion of N2. (b) The ratio (moles purge gas/mole of gas leaving the condenser) (c) The ratio (moles fresh feed/mole fed to the reactor)
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