This book studies the Stripping section of the Demethanizer of the C2/C3 Maximization Plant that produces C2/C3 mix which is sent to another plant to recover useful products, as CO2 content in this mix is a critical problem in the receiving plant a model is developed to simulate the stripping section of the Demethanizer. Some parameters are studied to examine its effect on the CO2 content in the C2/C3 mix such as Reboiler Temperature, methane, ethane concentration in feed stream and feed rate .Also equations were predicted to describe its relation with CO2 content in the C2/C3 mix.Also,A sensitivity analysis was made on the reboiler temperature and feed rate to determine the most effective parameter on the production rate of the C2/C3 mix.