| 摘要 |
Synthesis gas (carbon monoxide and hydrogen) is produced by the sequence of primary and secondary reforming comprising; (a) feeding hydrocarbon-containing gas (8) and steam (8) to a primary reforming zone (1) containing a primary steam reforming catalyst (5) under reforming conditions wherein the hydrocarbon gas (8) is partially reformed to produce a primary reformer effluent (9), (b) feeding the primary reformer effluent (9) and oxygen-containing gas (14) to a secondary reforming zone (2) containing secondary reforming catalyst (17) under reforming conditions wherein a secondary reformer effluent is produced (18), (c) passing the secondary reformer effluent to the primary reforming zone (1) as indirect heating medium, and (d) removing the secondary reforming effluent (18) from the primary reforming zone (1) and recovering the raw synthesis gas, wherein the primary reforming zone (1) comprises at least one double-pipe heat exchanger-reactor, the primary steam reforming catalyst (5) being positioned either in the central core (16) of the double-pipe heat exchanger-reactor or in the annulus (6) thereof and in that the secondary reformer effluent is passed through whichever of the central core (16) or annulus (6) does not contain the primary steam reforming catalyst (5) countercurrently to the hydrocarbon-containing gas and steam. |
