| 摘要 |
This invention discloses a high temperature stable supported non-noble metal catalyst, represented by a general formula: <?in-line-formulae description="In-line Formulae" end="lead"?>NiCo<SUB>a</SUB>Ce<SUB>b</SUB>Mg<SUB>c</SUB>Y<SUB>d</SUB>O<SUB>x</SUB>(y)/S <?in-line-formulae description="In-line Formulae" end="tail"?> wherein, S is a low surface area macroporous highly sintered solid support essentially comprising zirconium and hafnium oxides with less than 3 wt % silica and/or alumina and having surface area less than 1.0 m<SUP>2</SUP>/g and pore diameter greater than 0.1 micron, in a form of pellet, ring, monolith or granules; Ni, Co, Ce, Mg, Y and O are nickel, cobalt, cerium, magnesium, yttrium and oxygen, respectively; a is Co/Ni mole ratio in the range from 0.01 to 10; b is Ce/Ni mole ratio in the range from 0.001 to 10; c is Mg/Ni mole ratio in the range from 0.001 to 10; d is Y/Ni mole ratio in the range from 0.005 to 5; x is number of oxygen atoms required to fulfil the valance requirement of the metallic elements, NiCo<SUB>a</SUB>Ce<SUB>b</SUB>Mg<SUB>c</SUB>Y<SUB>d</SUB>; and y is weight percent loading of the active catalyst mass, NiCo<SUB>a</SUB>Ce<SUB>b</SUB>Mg<SUB>c</SUB>Y<SUB>d</SUB>O<SUB>x</SUB>, on the support, S, in the range from 0.7% to 70%, useful for autothermal reforming or partial oxidation of hydrocarbon(s) to syngas (a mixture of hydrogen and carbon monoxide) and catalytically very active when heated at a temperature equal to or above 1400° C. or even when subjected to high temperature shocks by heating it directly by an acetylene-oxygen flame and suddenly cooling it to a temperature below 100° C. and repeating the heating and cooling cycle at least for five times and also discloses a process for the partial oxidation of hydrocarbon(s) by oxygen to syngas in the presence or absence of steam and/or carbon dioxide in the feed using the thermally stable catalyst, the process comprises contacting with the high temperature stable catalyst a gaseous feed comprising hydrocarbon(s) and oxygen with or without steam and/or carbon dioxide in a continuous gas-solid catalyst contactor at the following reaction conditions: oxygen to carbon from hydrocarbon(s) mole ratio in the gaseous feed in the range from 0.01 to 0.6; steam to oxygen mole ratio in the gaseous feed in the range from 0.0 to 10.0; carbon dioxide to oxygen mole ratio in the gaseous feed in the range from 0.0 to 5.0; space velocity of the gaseous feed in the range from 5 dm<SUP>3</SUP>/g<SUB>catalyst</SUB>/h to 1000 dm<SUP>3</SUP>/g<SUB>catalyst</SUB>/h; reaction temperature in the range from 600° C. to 1200° C.; and pressure of at least 1 atm.
|
