An oven is heated with 1000 ft3 / h (at 60 ° F and 1 atm) of natural gas with the following composition volumetric: CH4 - 80%; C2H6 - 16%; O2 - 2%; CO2 - 1%, and N2 - 1%. For combustion gas is used, an excess of dry air of 15% is used. The effluent gas has a temperature 800 ° F and an absolute pressure of 760 mm · Hg. Determine: a) The average molar mass of natural gas at the entrance of the oven. b) The necessary air mass (in lb / h), assuming that at full combustion there is an excess of 15% air. c) The volumetric composition of the gas at the outlet, allowing complete combustion of natural gas. d) The gas flow (in ft3 / h) at the outlet. e) The volume of CO2 and H2O produced per hour.
An oven is heated with 1000 ft3 / h (at 60 ° F and 1 atm) of natural gas with the following composition
volumetric: CH4 - 80%; C2H6 - 16%; O2 - 2%; CO2 - 1%, and N2 - 1%. For combustion gas is used, an excess of dry air of 15% is used. The effluent gas has a temperature 800 ° F and an absolute pressure of 760 mm · Hg.
Determine:
a) The average molar mass of natural gas at the entrance of the oven.
b) The necessary air mass (in lb / h), assuming that at full combustion there is an excess of 15% air.
c) The volumetric composition of the gas at the outlet, allowing complete combustion of natural gas.
d) The gas flow (in ft3 / h) at the outlet.
e) The volume of CO2 and H2O produced per hour.
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