CLC METHOD AND FACILITY WITH PRODUCTION OF HIGH-PURITY NITROGEN

摘要

The invention relates to a CLC method, and the facility for same, producing high-purity dinitrogen, comprising: (a) combustion of a hydrocarbon feedstock by reduction of an oxidation-reduction active mass placed in contact with the feedstock, (b) a first oxidation step of the reduced active mass (25) from step (a) in contact with a fraction of a depleted stream of air (21b) in order to produce a high-purity stream of dinitrogen (28) and a stream of partially re-oxidised active mass (26); (c) a second oxidation step of the active mass stream (26) in contact with air (20) to produce the depleted air stream and the re-oxidised active mass stream (24) intended to be used in step (a); (d) dividing the depleted air stream from step (c) in order to form the depleted air fraction used in step (b) and a complementary depleted air fraction extracted from the CLC.