None c) A hydrocarbon fuel consists of 84.1% of carbon and 15.9% of hydrogen. If the total molecularweight of the fuel is 114.15g/mole:i)i)Name the hydrocarbon fuel and which internal combustion engine can safely burn it?Evaluate the stoichiometric Fuel Air ratio for combusting 1g of the fuel in 1g of air.Compute the equivalence ratio of the mixture.iv) Is the mixture in iii) above lean or rich? Why? (12 marks)[Molecular weights: Carbon 12.011 amu, Nitrogen 14.0067amu and Oxygen 15.999 amulうつかん232

Step 1: Determine the Molecular Formula of the HydrocarbonGiven the molecular weight of the fuel…

Answered: c) A hydrocarbon fuel consists of 84.1%…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A) A natural gas-fired industrial boiler operates with an oxygen concentration of 3 mole percent. Determine the operating air-fuel ratio and the equivalence ratio. Treat the natural gas as butane B) Write the equation of pentane-air combustion and determine the stoichiometric air-fuel ratio
A fuel can be created by blending two single component fuels. For example, consider a mix of 15% (by volume) of octane (C3H18) and 85% (by volume) of ethanol (C2H6O). Find the stiochiometric fuel-to-air ratio, F/Ast, for this fuel mixture. a) For an equivalence ratio of 0.9, find the actual combustion reaction. Express the b) reaction in terms of 1 kmol of fuel (total). c) Find the flow rate (g/s) of water from the products for a flow rate of 2 g/s of this blended fuel into a combustor.
External Problem: Fuel, air and combustion Gasoline having a chemical formula C3H17 is burned in an engine at a fuel-air equivalence ratio ø =1.19 and a temperature of 1000K. a) Write the stoichiometrc combustion equation of the fuel, b) Write the reaction equation corresponding to the given fuel-air equivalenee ratio
Prob. # 3] A producer gas has the following percentage volumetric composition: CO2 = 10.8 %,CO = 18.3 %, CH4 = 3.10 %, O2 = 0.10 %, H2 = 12.9 %, N2 = 54.6 %, and C2H4 = 0.20.Calculate: a) the weight analysis by elements; b) the weight analysis by compound; and c) theair-fuel ratio for an excess air of 35 %.
H1. Assume that 3.75 kg/s of air, at 750k and 20 bars, enters the premix chamber of a combustor. The target temperature inside the combustion chamber is 1900K. The following cases are to be analysed a) 100% Methane b) Blends of Methane and Hydrogen, with 30%-50% and 80% H2 by volume c) 100% Hydrogen For each case assume that Nitric Oxide (NO) is present in the products and is in equilibrium Calculate i. The mass flowrate of fuel required for each case ii. The resulting parts-per million of NO produced for each case
Problem 4) LHV and HHV of Fuels Consider the following list of some fuels with their LHV and HHV. a) Provide a plot of the LHV as a function of the molecular mass of the fuel. Group the fuels in categories and discuss any correlation between the heating values and the molecular mass. b) Provide a plot of the percentage increase of the HHV relative to the LHV as a function of the molecular mass of the fuel. Discuss any correlation or generalization. Fuel LHV and HHV LHV Methane (CH4) Propane (C3H8) Isooctane (C8H18) Cetane (C16H34) Methanol (CH40) Ethanol (C2H60) Carbon Monoxide (CO) (MJ/kg) 50.0 46.4 44.2 44.0 20.0 26.9 10.1 HHV (MJ/kg) 55.5 50.4 47.8 47.3 22.7 29.7 10.1
A gaseous mixture of methane, ethane and propane has their percent volume of 38%, 42% and 20% respectively. a.) What is the mass percentage of methane in the mixture? b.) What is the mass percentage of ethane in the mixture? c.) What is the mass percentage of propane in the mixture?
External Problem: Fuel, air and combustion Gasoline having a chemical formula CaH17 is burned in an engine at a fuel-air equivalence ratio =1.19 and a temperature of 1000K. a) Write the stoichiometric combustion equation of the fuel; b) Write the reaction equation corresponding to the given fuel-air equivalence ratio.
1. Find the air fuel ratio for stoichiometric combustion of Ethene by volume. (26.19/1) 2. Find the air fuel ratio for stoichiometric combustion of Butane by volume. (30.95/1). Calculate the % carbon dioxide present in the dry flue gas if 30% excess air is used. (10.6%) 3. Find the air fuel ratio for stoichiometric combustion of Propane by volume. (23.81/1). Calculate the % oxygen present in the dry flue gas if 20% excess air is used. (3.8%) 4. A gaseous fuel contains by volume: 5% CO2, 40% H2, 40% CH4, 15% N2 Determine the stoichiometric air and the % content of each dry product. (4.76 m2, 89.7%, N2 10.3% CO2)
Within the cylinder of an internal combustion engine, gasoline with an ordinary octane rating (C8H18) is intended to burn with an excess of air equal to fifty percent. a) Please display the actual equation for combustion.b) You need to calculate the actual air fuel ratio.c) Figure out the mass of wet products of combustion produced per kilogram of fuel, as well as the mass of dry products of combustion produced per kilogram of fuel
In an engine test the dry volumetric analysis of the products was CO2 0.0527, O2 0.1338 and N2 0.8135. Assume the fuel is a pure hydrocarbon and that it is completely burnt. Write the complete balance chemical equation on volume basis. Estimate: The ratio of carbon to hydrogen in the fuel by mass. The air/fuel ratio by Assume the percentage of nitrogen in air is: 76.7% by mass and 79% by volume (or mole).
4.1 fuel-rich air-fuel the exhaust gives the following 14.957; Cullg = 0.75% 0% H₂ = 0% 0₂ = 0%, with the rest being N₂. Write the balance chemical equation for one mole of this fuel at these conditions. CO = 1 Calculate : CHHS is burned in an engine with a ratio. Dry analysis of volume percents CO₂ : a- Air-fuel ratio. b. Equivalence ratio.

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