| 主权项 |
1. A process for the steam reforming of hydrocarbons comprising;
(i) partially combusting a feedgas comprising a hydrocarbon feedstock with an oxygen-containing gas in the presence of steam in a combustion zone using a burner apparatus to form a partially combusted hydrocarbon gas mixture at a temperature >1200° C. and (ii) subjecting the resultant partially combusted hydrocarbon gas mixture from the combustion zone to a steam reforming process by passing it adiabatically through a bed of steam reforming catalyst disposed below the burner apparatus, the bed of steam reforming catalyst comprising a first layer and a second layer, wherein the partially combusted hydrocarbon gas mixture is passed through the first layer and then the second layer, each layer comprising a catalytically active metal on an oxidic support wherein the catalytically active metal in the first layer is selected from the group consisting of platinum, palladium, iridium, ruthenium or rhodium, the oxidic support for the first layer is a zirconia, the catalytically active metal in the second layer is nickel and the oxidic support for the second layer is a refractory support selected from the group consisting of zirconia, alumina, calcium aluminate, magnesium aluminate, titania, magnesia and a mixture thereof, wherein a layer of zirconia balls, pellets or tiles is placed on top of the first layer of reforming catalyst. |
