Process For Producing Olefins By Steam Cracking By Upgrading A Pyrolysis Gas

Abstract: A process for producing olefins from a feedstock containing plastic and/or tyres and/or solid recovered fuels, said process comprising the following steps: (a) performing a step of pyrolysis of a feedstock containing plastic and/or tyres and/or solid recovered fuels in a pyrolysis unit so as to recover at least a first gaseous effluent containing a mixture of H2, CO, CO2 and C1 to C6 hydrocarbons, and a first liquid effluent containing C7+ hydrocarbons; (b) compressing and then cooling said first gaseous effluent, and then separating said compressed and cooled first gaseous effluent so as to obtain a second liquid effluent containing predominantly C3+ hydrocarbons and a residual second gaseous effluent concentrated in H2, CO and CO2; (c) introducing said second liquid effluent into a steam cracking unit in the presence of steam.

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