JOINT PRODUCTION OF HYDROGEN-ENRICHED COMPRESSED NATURAL GAS AND CARBON NANOTUBES Russian patent published in 2023 - IPC C01B3/26 C01B32/162 B01J8/26 

FIELD: natural gas production.

SUBSTANCE: co-production of hydrogen-enriched compressed natural gas (H-CNG) and, in particular, to methods and apparatus for the co-production of H-CNG and carbon nanotubes (CNTs). At the beginning of the process, the reaction cycle is carried out in the first reactor. Then the catalyst is loaded into the second reactor, followed by the execution of the reaction cycle at the first predetermined time after the start of the reaction cycle in the first reactor. In this case, the second reactor remains in operation for a second predetermined time after the termination of the reaction cycle in the first reactor. Next, the catalyst is loaded into the first reactor and the reaction cycle is performed in the first reactor at the third predetermined time after the start of the reaction cycle in the second reactor. In this case, the first reactor remains in operation for the fourth predetermined time after the termination of the reaction cycle in the second reactor. The above steps are then repeated to continuously co-produce H-CNG and CNTs. The first and second reactors are fluidized bed reactors. In this case, the reaction cycle involves the activation of the catalyst by heating it, passing the initial hydrocarbon gas through the reactor, carrying out the cracking reaction in the reactor, removing the product gas and the spent catalyst from the reactor, passing the product gas through a cyclone, separating CNTs from the spent catalyst, and recovering heat from the separated product gas, passing the heated fluid stream through the catalytic reactor, terminating the reaction in the fluidized bed reactor, and removing residual spent catalyst and product gases. The invention also discloses a fluidized bed apparatus and reactor for co-producing hydrogen-enriched compressed natural gas and carbon nanotubes.

EFFECT: continuous and simultaneous production of H-CNG and CNTs.

21 cl, 5 dwg, 1 ex