METHOD OF DIRECT PYROLYSIS OF METHANE Russian patent published in 2000 - IPC

FIELD: chemical industry, more particularly preparation of ethylene, acetylene and other lower olefins from methane. SUBSTANCE: natural gas being pyrolized is preheated to 900-1000 K, and conversion of methane is carried out in two steps; in first step, heated mixture of products of primary analysis is maintained at pressure of 2-5 MPa in adiabatic mode for 5-10 ms. Reaction products are then hardened. Temperature range as indicated above is maintained in first step of methane conversion due to supplying energy from outside. In first step mixture being pyrolized is heated either by heating methane is plasma jet of hydrogen or either by heating with electric current, or by method of induction heating. Method makes it possible to carry out direct conversion of methane and to prepare 67.4% of ethylene and 9.1% of acetylene in pyrolysis products. Degree of methane conversion is 88.1%. EFFECT: more efficient method of direct pyrolysis of methane. 5 cl, 1 dwg, 5 tbl