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1. Natural gas is burnt in a furnace (composition 95% methane, 5% nitrogen) and the following flue gas analysis was obtained: carbon dioxide 9.1%, carbon monoxide 0.2%, oxygen 4.6%, nitrogen 86.1%, all percentages by volume. Calculate the percentage excess air flow (percentage above stoichiometric). Reaction CH4 +20₂ → CO₂ + 2H₂O

1. Natural gas is burnt in a furnace (composition 95% methane, 5% nitrogen) and the following flue gas analysis was obtained: carbon dioxide 9.1%, carbon monoxide 0.2%, oxygen 4.6%, nitrogen 86.1%, all percentages by volume. Calculate the percentage excess air flow (percentage above stoichiometric). Reaction CH4 +20₂ → CO₂ + 2H₂O

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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TUTORIAL QUESTIONS 1. Natural gas is burnt in a furnace (composition 95% methane, 5% nitrogen) and the following flue gas analysis was obtained: carbon dioxide 9.1%, carbon monoxide 0.2%, oxygen 4.6%, nitrogen 86.1%, all percentages by volume. Calculate the percentage excess air flow (percentage above stoichiometric). Reaction = CH4 +20₂ → CO₂ + 2H₂O 2. A stream containing liquid Acetaldehyde at a temperature of 10°C is to be vapourised. Saturated steam is available at 100°C. Calculate the amount of steam required to vapourize the acetaldehyde if the flow rate for the acetaldehyde is 100kg/hr (2270.02mol/hr) Cp of Acetaldehyde: Cp of water: Latent heat of Acetaldehyde: Latent heat of water: Boiling point of Acetaldehyde: 89.05J/mol.k 4184J/kg.k 5.69 x 105J/kg 2.25 x 106 J/kg 20°C 3. A stream containing vaporized Acetaldehyde at a temperature of 20°C is to be condensed and cooled to 10°C using cooling water. The cooling water is available at a temperature of 5°C. The outlet temperature for the cooling water is 50°C. Calculate the amount of cooling water required to cool down the acetaldehyde if the flow rate for the acetaldehyde is 100kg/hr (2270,02mol/hr) Cp of Acetaldehyde: Cp of water: Latent heat of Acetaldehyde: Boiling point of Acetaldehyde: 89.05J/mol.k 4184J/kg.k 5.69 x 105J/kg 20°C 4. Estimate the cost of the following items of equipment: 1. A packaged boiler to produce 20,000 kg/h of steam at 40 bar; 2. A centrifugal compressor, driver power 75kW; 3. A plate and frame filter press, capacity 10m³; 4. A floating-roof storage tank, capacity 50,000m³; 5. A cone-roof storage tank, capacity 35,000m³. 5. Aniline is produced by the hydrogenation of nitrobenzene. A small amount of cyclo- hexylamine is produced as a by-product. The reactions are: C6H5NO₂ + 3H₂ → C6H5NH₂ + 2H₂O C6H5NO₂ + 6H₂ → C6H₁1NH₂ + 2H₂O 1
Transcribed Image Text:TUTORIAL QUESTIONS 1. Natural gas is burnt in a furnace (composition 95% methane, 5% nitrogen) and the following flue gas analysis was obtained: carbon dioxide 9.1%, carbon monoxide 0.2%, oxygen 4.6%, nitrogen 86.1%, all percentages by volume. Calculate the percentage excess air flow (percentage above stoichiometric). Reaction = CH4 +20₂ → CO₂ + 2H₂O 2. A stream containing liquid Acetaldehyde at a temperature of 10°C is to be vapourised. Saturated steam is available at 100°C. Calculate the amount of steam required to vapourize the acetaldehyde if the flow rate for the acetaldehyde is 100kg/hr (2270.02mol/hr) Cp of Acetaldehyde: Cp of water: Latent heat of Acetaldehyde: Latent heat of water: Boiling point of Acetaldehyde: 89.05J/mol.k 4184J/kg.k 5.69 x 105J/kg 2.25 x 106 J/kg 20°C 3. A stream containing vaporized Acetaldehyde at a temperature of 20°C is to be condensed and cooled to 10°C using cooling water. The cooling water is available at a temperature of 5°C. The outlet temperature for the cooling water is 50°C. Calculate the amount of cooling water required to cool down the acetaldehyde if the flow rate for the acetaldehyde is 100kg/hr (2270,02mol/hr) Cp of Acetaldehyde: Cp of water: Latent heat of Acetaldehyde: Boiling point of Acetaldehyde: 89.05J/mol.k 4184J/kg.k 5.69 x 105J/kg 20°C 4. Estimate the cost of the following items of equipment: 1. A packaged boiler to produce 20,000 kg/h of steam at 40 bar; 2. A centrifugal compressor, driver power 75kW; 3. A plate and frame filter press, capacity 10m³; 4. A floating-roof storage tank, capacity 50,000m³; 5. A cone-roof storage tank, capacity 35,000m³. 5. Aniline is produced by the hydrogenation of nitrobenzene. A small amount of cyclo- hexylamine is produced as a by-product. The reactions are: C6H5NO₂ + 3H₂ → C6H5NH₂ + 2H₂O C6H5NO₂ + 6H₂ → C6H₁1NH₂ + 2H₂O 1
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