A fuel gas mixture of 10500 lbmol/hr 35 mol% ethane, 25 mol% propane, and the balance butane is fed to a combustion reactor with 12% excess air. In this reactor there is complete combustion only (no CO). There are fractional conversions of 82, 73, and 69% for ethane, propane, and butane, respectively. (a) Draw a PFD of the process. (b) Write down all relevant balanced equations. (c) Calculate the molar flowrate of incoming air.
A fuel gas mixture of 10500 lbmol/hr 35 mol% ethane, 25 mol% propane, and the
balance butane is fed to a combustion reactor with 12% excess air. In this reactor there is
complete combustion only (no CO). There are fractional conversions of 82, 73, and 69% for
ethane, propane, and butane, respectively.
(a) Draw a PFD of the process.
(b) Write down all relevant balanced equations.
(c) Calculate the molar flowrate of incoming air.
(d) Calculate the molar flowrate of the stack gas, along with component flowrates.
(e) Calculate the dry basis composition of the stack gas.
(f) Calculate the wet basis composition of the stack gas.
Given,
The molar feed rate of fuel,
The mole % of the components in the feed are ethane, propane, and butane.
The fractional conversions of ethane, propane and butane are , and respectively.
The fuel gas is fed to the reactor with air and forms carbon dioxide and water. The exhaust gas contains a mixture of ethane, propane, butane, carbon dioxide, water, oxygen and nitrogen.
Step by step
Solved in 7 steps with 1 images
