The problem of environmentally friendly utilization of natural gas in important products is relevant. The solution to this problem will minimize environmental pollution from products of burning of natural gas. A significant part of natural and associated petroleum gas is flared during their production, polluting the environment. The rest is used for heating and a small part is processed into valuable products. This leads to irreparable losses of valuable natural raw materials, the loss of potential profit due to the price difference between expensive products and cheap raw materials and creates complex environmental problems in the mining regions. In recent years, much attention has been paid to various methods of oxidative conversion of methane. Catalysts based on heteropoly compounds supported on supports were studied by the oxidative condensation of methane into ethylene. Using a set of methods (TPR, IR spectroscopy, XRD), it was shown that the exposure of the H4SiW12O40 heteropoly acid in the components of the air–water vapor reaction medium leads to the preservation of its secondary structure in the temperature range 20 - 400 °?, the formation of oxide-like W compounds at ? = 650 °?, along with the preservation of oxygen-containing fragments W – O - W, W = O, Si – O - W heteropoly acids.