On an "as received" basis, the proximate analysis of a representative coal from the Semirara Plant is 32% VCM, 53% FC, 10% ash, 1.2%N and 6.2%S. Its calorific value is 23.78 MJ/kg. On the assumption that this coal is burnt with 150% excess air so that the molal ratio of CO2 to CO is 5:1, calculate:a) m3 dry air at 25°C, 750 mm Hg/kg coal (16.64)b) Complete analysis of the flue gas (5.76% CO2 1.15%CO, 0.28% SO2. 12.75% 0,, 76.41% N2, 3.66% H2O)c) m3 flue gas at 240°C, 770 mm Hg/kg coal (28.87)d) % CV lost due toi) Unburnt combustibles (9.52%)ii) Uncondensed water (4.71%)iii) Sensible Heat (19.46%)

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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

Section: Chapter Questions

Problem 1.1P

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On an "as received" basis, the proximate analysis of a representative coal from the Semirara Plant is 32% VCM, 53% FC, 10% ash, 1.2%N and 6.2%S. Its calorific value is 23.78 MJ/kg. On the assumption that this coal is burnt with 150% excess air so that the molal ratio of CO2 to CO is 5:1, calculate:

a) m3 dry air at 25°C, 750 mm Hg/kg coal (16.64)
b) Complete analysis of the flue gas (5.76% CO2 1.15%CO, 0.28% SO2. 12.75% 0,, 76.41% N2, 3.66% H2O)
c) m3 flue gas at 240°C, 770 mm Hg/kg coal (28.87)
d) % CV lost due to

i) Unburnt combustibles (9.52%)
ii) Uncondensed water (4.71%)

iii) Sensible Heat (19.46%)

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