A natural gas has the following molar analysis: CH4, 80.62%; CH6, 5.41%; C3H8, 1.87%; C4H10, 1.60%;...

 

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A natural gas has the following molar analysis: CH4, 80.62%; C₂H6, 5.41%; C3H8, 1.87%; C4H10, 1.60%; N2, 10.50%. The gas is burned with dry air, giving products having a molar analysis on a dry basis: CO2, 7.8%; CO, 0.2%; O2, 7%; Nz, 85%. a) Write the balanced reaction equation. b) Determine the air-fuel ratio on a mass basis and molar basis. c) Assuming ideal gas behavior for the fuel mixture, determine the amount of products in kmol that would be formed from 100 m³ of fuel mixture at 300 K and 1 bar. d) Determine the percent of theoretical air. e) Determine the analysis of the combustion products on molar basis. f) Determine the dew point temperature of the combustion products, in °C, at 1 atm. g) Calculate the chemical exergy exiting with the combustion products (please note that the condensation of water in the flue gas). A natural gas has the following molar analysis: CH4, 80.62%; C₂H6, 5.41%; C3H8, 1.87%; C4H10, 1.60%; N2, 10.50%. The gas is burned with dry air, giving products having a molar analysis on a dry basis: CO2, 7.8%; CO, 0.2%; O2, 7%; Nz, 85%. a) Write the balanced reaction equation. b) Determine the air-fuel ratio on a mass basis and molar basis. c) Assuming ideal gas behavior for the fuel mixture, determine the amount of products in kmol that would be formed from 100 m³ of fuel mixture at 300 K and 1 bar. d) Determine the percent of theoretical air. e) Determine the analysis of the combustion products on molar basis. f) Determine the dew point temperature of the combustion products, in °C, at 1 atm. g) Calculate the chemical exergy exiting with the combustion products (please note that the condensation of water in the flue gas).

Answer rating: 100% (QA)

A Write the balanced reaction equation The balanced reaction equation for the combustion of the given natural gas with dry air is C4H10 13 104 O2 4 CO2 5 H2O B Determine the airfuel ratio on a mass ba... View the full answer