**Particularities of Membrane Gas Separation Under Unsteady State Conditions**

Igor N. Beckman1,2, Maxim G. Shalygin1 and Vladimir V. Tepliakov1,2 *1A.V.Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences 2M.V.Lomonosov Moscow Sate University, Chemical Faculty Russia* 
