Method and device for producing ethylene

摘要

Plant comprises: a reactor (2), which is designed and provided for oxidative coupling of methane; a processing unit (3), which is connected to the reactor and is designed for separating a first material stream (S) produced during the oxidative coupling of methane into at least one 1C-material stream and an ethylene product stream; and a separating unit (4), which is connected to the processing unit and is designed to separate the material stream at least into a hydrogen-rich product stream and an low-hydrogen residual gas stream. Plant comprises: a reactor (2), which is designed and provided for oxidative coupling of methane; a processing unit (3), which is connected to the reactor and is designed for separating a first material stream (S) produced during the oxidative coupling of methane into at least one 1C-material stream and an ethylene product stream; a separating unit (4), which is connected to the processing unit and is designed to separate the material stream at least into a hydrogen-rich product stream and an low-hydrogen residual gas stream; and a steam cracking device (5), which is connected to the processing unit and is provided for producing an olefin- and hydrogen-containing crude gas stream. The processing unit is designed to separate the crude gas together with the first material stream into at least the 1C-material stream and the ethylene product stream. The plant is designed to feed at least one part of the residual gas stream back into the reactor as feedstock. An independent claim is included for producing ethylene, comprising introducing oxygen and methane in the reactor, coupling the methane in the reactor with the formation of the first material stream by oxidation, generating the olefin- and hydrogen-containing crude gas stream by steam reforming of a hydrocarbon-containing insert in the steam cracking device, separating the first material stream together with the crude gas stream in the processing unit in the ethylene product stream and the 1C-material stream, separating the 1C-material stream in the separating unit in the hydrogen product stream and the low-hydrogen residual gas stream, and recycling at least a partial stream of the residual gas stream as an insert into the reactor.