| 摘要 |
A process for the steam reforming of hydrocarbons in an autothermal or secondary reformer is described comprising (i) non-catalytically partially combusting a feedgas comprising a hydrocarbon with an oxygen-containing gas in the presence of steam to form a partially oxidised hydrocarbon gas mixture at a temperature ¥1200oC and (ii) passing the partially oxidised hydrocarbon gas mixture through a first particulate layer of steam reforming catalyst, a second particulate layer of steam reforming catalyst and a third particulate layer of steam reforming catalyst, wherein the first layer comprises a catalytically active metal selected from platinum, palladium, iridium, ruthenium or rhodium supported on a zirconia, and the second and third layers comprise nickel on a refractory support selected from alumina, calcium aluminate, magnesium aluminate, titania, zirconia, magnesia or mixtures thereof, wherein the second layer has a voidage ¥0.5 and a higher equivalent passage diameter than the third layer. |
