Combustion Reactions: Example Problems

Try to solve these problems before watching the solutions in the screencasts.

Example Problem 1

\[CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O\]

\[CH_4 + \frac{3}{2} O_2 \rightarrow CO + 2H_2O\]

Given:

  • Basis of 100 moles methane
  • 25% excess air
  • Complete conversion of methane
  • No partial combustion

Find:

  • Moles of air fed to reactor
  • Moles of each component in stack gas
Example Problem 2

Given:

  • Basis of 100 moles ethane
  • 50% excess air

Find:

  • Ratio of water/dry gas in stack gas
Image of a flow chart for an example problem in the Combustion Reactions Module