A gas consisting only of CO and N2 is made by passing a mixture of flue gas and air through a bed of incandescent coke (assume pure carbon). The two reactions that occur both go to completion: CO 2 + C → 2CO and 2C + O 2 → 2CO The flue gas composition is 12.8 mol-% CO, 3.7 mol-% CO2, 5.4 mol-% O2, and 78.1 mol-% N2. The flue gas/air mixture is so proportioned that the heats of the two reactions cancel, and the temperature of the coke bed is therefore constant. If this temperature is 875°C, if the feed stream is preheated to 875°C, and if the process is adiabatic, what ratio of moles of flue gas to moles of air is required, and what is the composition of the gas produced?
A gas consisting only of CO and N2 is made by passing a mixture of flue gas and air through a bed of incandescent coke (assume pure carbon). The two reactions that occur both go to completion: CO 2 + C → 2CO and 2C + O 2 → 2CO The flue gas composition is 12.8 mol-% CO, 3.7 mol-% CO2, 5.4 mol-% O2, and 78.1 mol-% N2. The flue gas/air mixture is so proportioned that the heats of the two reactions cancel, and the temperature of the coke bed is therefore constant. If this temperature is 875°C, if the feed stream is preheated to 875°C, and if the process is adiabatic, what ratio of moles of flue gas to moles of air is required, and what is the composition of the gas produced?
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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A gas consisting only of CO and N2 is made by passing a mixture of flue gas and
air through a bed of incandescent coke (assume pure carbon). The two reactions that
occur both go to completion:
CO 2 + C → 2CO and 2C + O 2 → 2CO
The flue gas composition is 12.8 mol-% CO, 3.7 mol-% CO2, 5.4 mol-% O2, and
78.1 mol-% N2. The flue gas/air mixture is so proportioned that the heats of the two
reactions cancel, and the temperature of the coke bed is therefore constant. If this
temperature is 875°C, if the feed stream is preheated to 875°C, and if the process is
adiabatic, what ratio of moles of flue gas to moles of air is required, and what is the
composition of the gas produced?
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