A method and system for controlling an extraction pressure and temperature of a stoichiometric EGR system

The present invention provides a system 100 and method that yields an exhaust stream 270 that includes a relatively high concentration of a desirable gas and is also substantially oxygen-free. This desirable gas includes, but is not limited to: Carbon Dioxide (CO2), Nitrogen (N2), or Argon. The present invention also provides a way to control the physical property of the exhaust stream 270.