Hydrothermal pretreatment for increasing average pore size in a catalyst support
AssigneeConoco Inc.
InventorsDaxiang Wang, Tianyan Niu, Gloria I. Starguzzi, Harold A. Wright
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Abstract
A pretreatment method for increasing the average pore size of a catalyst support is disclosed which increases the diffusivity and effectiveness factor η. The pretreatment method includes calcining the support in moisturized air at an elevated temperature sufficient to increase the average pore size. In some embodiments, the support may be treated with an acidic/basic solution prior to the calcination step. Alternatively, the calcination step may occur in a gas mixture including water/air/acidic (or basic) gases.
Claims33
A method for increasing the average pore size of a catalyst support, the method comprising the step of:
- calcining the support in moisturized air at an elevated temperature sufficient to increase the average pore size.
A partial oxidation catalyst comprising:
- a porous support;
- and
- a catalytically active metal dispersed on the support,
- wherein the support has been calcined in moisturized air at an elevated temperature sufficient to increase the average pore size.
A method for preparing a partial oxidation catalyst comprising, the method comprising the steps of:
- a) calcining a support material in moisturized air at an elevated temperature sufficient to increase the average pore size;
- and
- b) loading the support material with a catalytically effective amount of a precious metal to form the partial oxidation catalyst.
The method of claim 32 wherein step b) is achieved through wet impregnation.
A process for producing synthesis gas, comprising contacting a feed stream comprising methane and oxygen with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising carbon monoxide and hydrogen, wherein the catalyst comprises a catalytically active metal selected from the group consisting of Group VIII metals and combinations thereof dispersed in a meso/macroporous support, wherein support has been calcined in moisturized air at an elevated temperature sufficient to increase the average pore size.
Dependencies are inferred from the claim text.