A boiler you make use of has coal, which is low in sulfur and nitrogen, as fuel. The coal contains 4.8% moisture and 15% ash. The air used for combustion is assumed to be at 92°F, and water vapor in air has a pressure of 20 mmHg. You analyzed the stack gas and found that it contains 14.26% CO2, 0.52% CO, 0.41% H2, 4.32% O2 and 80.49% N2. Water in the stack gas has a pressure of 68.8 mmHg and temperature is 464°F.a. The coal is supplied every hour at 3180 lb. How much air would be needed for every pound of coal?b. What is the complete ultimate analysis of the fuel?

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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

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A boiler you make use of has coal, which is low in sulfur and nitrogen, as fuel. The coal contains 4.8% moisture and 15% ash. The air used for combustion is assumed to be at 92°F, and water vapor in air has a pressure of 20 mmHg. You analyzed the stack gas and found that it contains 14.26% CO₂, 0.52% CO, 0.41% H₂, 4.32% O₂ and 80.49% N₂. Water in the stack gas has a pressure of 68.8 mmHg and temperature is 464°F.

a. The coal is supplied every hour at 3180 lb. How much air would be needed for every pound of coal?

b. What is the complete ultimate analysis of the fuel?

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