TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Equipment: The compressor and turbine can be situated above or below the reactor. The plant also comprises a device for the separation of water formed during reaction, a device for pre-heating natural gas and air or diluted oxygen, a device for cooling effluents from the reactor, and a device for the elimination of solid particles at the exit of reactor, preferably in form of cyclone separator. Gaseous charge is separated into at least two streams: the first stream introduced to the upper part of reactor, and the second stream introduced into lower part of reactor. The latter preferably contains pipes filled with catalyst, immersed in its lower part. The plant may additionally contain the turbine permitting power recovery by means of electric generator. The installation comprises gas turbine comprising axial compressor connected to power turbine, owing to which the air or oxygen diluted by atmospheric inert gas become compressed, combustion chamber where natural gas is totally burned with compressed air or diluted oxygen, a turbine in which warm air or diluted oxygen is pressurized, an additional combustion chamber supplied by natural gas, in which gas flux is subjected to post-combustion, the pipe for passing heated stream from additional combustion chamber to the side of exchanger reactor, pipe supplying natural gas whose main part is utilized to produce synthesis gas, heat exchanger for heating natural gas stream and cooling effluent containing synthesis gas, cooler for condensation of water contained in the effluent, separator of condensed water, separator for separating preheated gas charge into stream entering upper part of exchanger reactor, and the stream entering lower part of this reactor, the pipe delivering steam, the pipe supplying mixture of steam and natural gas in the reactor, where it is rapidly heated by means of hot gas stream introduced through reactor side, the pipe taking effluent from reactor to cyclone separator to eliminate all solid particles, the turbine through which the effluent from cyclone is passing, permitting recovery of power by means of electricity generator and the pipe for collection of synthesis gas.