Method for anaerobic preparation of ethylene directly through catalytic conversion of methane by metal doped molecular sieve

The invention relates to synthesis of a molecular sieve lattice doped metal atom catalyst and a method for direct catalytic conversion of methane to ethylene under anaerobic and continuous flow conditions and co-production of aromatic hydrocarbon and hydrogen products. Under a fixed bed reaction model, the reaction temperature is preferably 650-1150DEG C; the reaction pressure is preferably atmospheric pressure; the mass space velocity of the reaction feed gas is preferably 1500-20000mL/g/h. The methane conversion rate is 0.5-20%, and the ethylene selectivity is 1-40%. The method has the characteristics of controllable catalyst preparation, easy product separation, good process repeatability, safe and reliable operation and the like, and has broad industrial application prospect.