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1. The volumetric analysis of flue gas from combustion of methane in a gas boiler is...
1.f) Methane gas (CH4) enters a combustion chamber at a rate of 3 kg/sec at a...
1.f) Methane gas (CH4) enters a combustion chamber at a rate of 3 kg/sec at a temperature of 25 °C. A 200% theoretical air is supplied at a temperature of 400K. At the middle of methane combustion process (i.e., after 50% of methane gas is burnt), liquid propane (C3H8) at 25°C is injected at a rate that produces neither CO nor O2 in the flue gases. Assume steady state and adiabatic process at 1 atm, calculate the following i. The...
A natural gas fuel consists of the following volumetric composition: Methane, CH4: 92.5 % Ethane, C2H6:...
A natural gas fuel consists of the following volumetric composition: Methane, CH4: 92.5 % Ethane, C2H6: 3.7 % Propane, C3H8: 0.8 % Nitrogen, N2: 3 % (a) Write out the complete combustion equations for all the combustible constituents individually. (b) Calculate the stoichiometric air to fuel (A/F) ratio on a volume basis. (c) Determine the wet volumetric analysis of the combustion products. (d) Find the dry volumetric analysis of the combustion products.
Q4 Methane gas (CH) burns with 40%excess air, and products leave at 700 K.Assuming the fuel...
Q4 Methane gas (CH) burns with 40%excess air, and products leave at 700 K.Assuming the fuel and air enter the combustion chamber at 250 C and atmospheric pressure, determine (a) Air fuel ratio (b) the dew point of the products and (c) the heat transfer from the combustion process for 1 kmole of CH4 Substance hr, 700 K kJ/kmol he, 298 K kJ/kmol kJ/kmol CH4 02 N2 CO2 H2O -74,850 8.682 8,669 -393,520 9,364 -241,820 9,904 21,184 20,604 27,125 24,088...
From a combustion process that used ethane (C2He) as a fuel, the ORSAT analysis of the...
From a combustion process that used ethane (C2He) as a fuel, the ORSAT analysis of the stack gases on a nitrogen free basis is as follows: Component CO2 CO O2 Xi (molar basis) 0.289 0.191 0.520 Determine: 1.1. Percentage of the fuel that produced CO 1.2. Percentage of the fuel that produced CO 1.3. Selectivity of CO: with respect to CO 1.4. Theoretical Oxygen. 1.5. Percentage Excess Air 1.6. Amount of Nitrogen produced 1.7. Composition of flue gas (molar) on...
QUESTION 3 (25 MARKS In a power plant boiler, coal which has an ultimate analysis by...
QUESTION 3 (25 MARKS In a power plant boiler, coal which has an ultimate analysis by mass of 39.25 percent C, 6.93 percent H2, 41.11 percent 02, 0.72 percent N2, 0.79 percent S, and 11.20 percent Ash (non-combustibles) is burned steadily with 40% excess air. Assuming the combustion process as complete and treating the air as dry air, determine: (a) The balanced combustion equation for the combustion process. [6 Marks] (6) The Air-Fuel ratio [6 Marks) (c) The heat transfer...
H.W.6.17. A boiler is supplied with coal gas of the following composition: 53.6% H2, 9% CO,...
H.W.6.17. A boiler is supplied with coal gas of the following composition: 53.6% H2, 9% CO, 25% CH4, 3% C4H8, 0.4% O2, 3% CO2, 6% N2. If the air fuel ratio is 6.5/1 by volume, calculate the analysis of the dry products of combustion by volume.
A stream of methane at 120.90 kg/hr is burned in a boiling tank. The boiler is...
A stream of methane at 120.90 kg/hr is burned in a boiling tank. The boiler is fed 37.30 % air, in excess. Solve for the water composition of the flue gas (wet basis), in mass percentage. Air can be treated to be 78 % N2, 21 % O2 and 1% Argon, where all percentages are in mole percents. The average molecular weight for air of this composition is 28.97 kg/kgmol
Thermodynamics 6. A certain natural gas has the following volumetric analysis: 65 percent CH4, 8 percent...
Thermodynamics
6. A certain natural gas has the following volumetric analysis: 65 percent CH4, 8 percent H2, 18 percent N2, 3 percent O2, and 6 percent CO2. This gas is now burned completely with the stoichiometric amount of dry air. What is the air-fuel ratio for this combustion process, and the equivalence ratio?
furnace uses a producer gas of the following analysis 5.3% CO2, 21.1% CO, 15.3% H2, 1.0%...
furnace uses a producer gas of the following analysis 5.3% CO2, 21.1% CO, 15.3% H2, 1.0% CH4 and 57.3% N2. The flue gases contain14,1% CO2, 2.3% O2 and 83.6% N2. Calculate the percentage air used for combustion.
Problem 4 A fuel gas has a composition by volume of: 50% H2 , 6% CO2,...
Problem 4 A fuel gas has a composition by volume of: 50% H2 , 6% CO2, 4% N2 , 40% CO. The dry exhaust gas analysis (% by volume) of the actual combustion process indicates 9.2% CO2, 0% CO, some O2. Recall that for gases, volumetric composition is the same as molar composition. (a) What air/gas ratio (by volume) is required for stoichiometric combustion? (m? air/ m² fuel gas) (b) What air/gas ratio (by volume) has actually been used? (m’...
1.f) Methane gas (CH4) enters a combustion chamber at a rate of 3 kg/sec at a temperature of 25 °C. A 200% theoretical air is supplied at a temperature of 400K. At the middle of methane combustion process (i.e., after 50% of methane gas is burnt), liquid propane (C3H8) at 25°C is injected at a rate that produces neither CO nor O2 in the flue gases. Assume steady state and adiabatic process at 1 atm, calculate the following i. The...
Q4 Methane gas (CH) burns with 40%excess air, and products leave at 700 K.Assuming the fuel and air enter the combustion chamber at 250 C and atmospheric pressure, determine (a) Air fuel ratio (b) the dew point of the products and (c) the heat transfer from the combustion process for 1 kmole of CH4 Substance hr, 700 K kJ/kmol he, 298 K kJ/kmol kJ/kmol CH4 02 N2 CO2 H2O -74,850 8.682 8,669 -393,520 9,364 -241,820 9,904 21,184 20,604 27,125 24,088...
From a combustion process that used ethane (C2He) as a fuel, the ORSAT analysis of the stack gases on a nitrogen free basis is as follows: Component CO2 CO O2 Xi (molar basis) 0.289 0.191 0.520 Determine: 1.1. Percentage of the fuel that produced CO 1.2. Percentage of the fuel that produced CO 1.3. Selectivity of CO: with respect to CO 1.4. Theoretical Oxygen. 1.5. Percentage Excess Air 1.6. Amount of Nitrogen produced 1.7. Composition of flue gas (molar) on...
QUESTION 3 (25 MARKS In a power plant boiler, coal which has an ultimate analysis by mass of 39.25 percent C, 6.93 percent H2, 41.11 percent 02, 0.72 percent N2, 0.79 percent S, and 11.20 percent Ash (non-combustibles) is burned steadily with 40% excess air. Assuming the combustion process as complete and treating the air as dry air, determine: (a) The balanced combustion equation for the combustion process. [6 Marks] (6) The Air-Fuel ratio [6 Marks) (c) The heat transfer...
Thermodynamics
6. A certain natural gas has the following volumetric analysis: 65 percent CH4, 8 percent H2, 18 percent N2, 3 percent O2, and 6 percent CO2. This gas is now burned completely with the stoichiometric amount of dry air. What is the air-fuel ratio for this combustion process, and the equivalence ratio?
Problem 4 A fuel gas has a composition by volume of: 50% H2 , 6% CO2, 4% N2 , 40% CO. The dry exhaust gas analysis (% by volume) of the actual combustion process indicates 9.2% CO2, 0% CO, some O2. Recall that for gases, volumetric composition is the same as molar composition. (a) What air/gas ratio (by volume) is required for stoichiometric combustion? (m? air/ m² fuel gas) (b) What air/gas ratio (by volume) has actually been used? (m’...
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