During last decades some developments on the methane chemistry (major component of natural gas) have brought the attention to methane as a feasible source for petrochemical commodities. More reactive intermediate products, such as ethylene, are major goals of current research. This can be used for production of polymers, plasticizers, food additives, etc. In this direction the oxidative coupling of methane (OCM) is seen as a potential process to transform methane in higher value added chemicals. As observed in Figure 1, during OCM methane reacts with oxygen at high temperature (700-900 °C) using a selective catalyst, producing ethylene, ethane, hydrogen, and also some combustion products (CO, CO2 and H2O). Reaction conversion is around 30%, and it is expected a large amount of methane in the final product. Because of the low concentration of ethylene and the large amount of byproducts, recovery might require expensive cryogenic distillations. Among different separation alternatives, selective adsorption and pressure swing can be used for selective removal of ethylene from the gas mixture. Most effort in this process has been focused on developing selective ethylene adsorbents such as activated carbons and crystalline silicates (zeolita 4A). Taking this into account, this work intends to evaluate the use of zeolite X as adsorbent for the separation of OCM product gases, both at laboratory and pilot plant scale. This work will be done in collaboration with the institute for process and chemical engineering from TU Berlin (TUB).