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US 6,271,170 B1Granted
Nickel-alumina aerogel catalyst for carbon dioxide reforming of methane and the preparation method thereof
AssigneeKorea Institute of Science and Technology
InventorsDong Jin Suh, Tai Jin Park, Young Hyun Yoon, Jin Hong Kim
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Abstract
The present invention relates to a method of containing nickel into the alumina aerogel prepared by sol-gel method and supercritical drying and of preparing the nickel-alumina hybrid aerogel catalyst. The nickel-alumina catalyst prepared in the present invention has an excellent reactivity with a prolonged lifetime.
Claims10
A method of preparing an alumina aerogel support for a nickel-alumina catalyst comprising the steps of:
- a first step of dissolving aluminum alkoxide in a heated alcoholic solvent;
- a second step of adding a mixture of water, acid and alcohol into the thusly prepared solvent to form a transparent sol by partial hydrolysis;
- a third step of cooling the transparent sol to room temperature and then adding alcohol containing water to the cooled sol to form a gel;
- a fourth step of aging the gel;
- a fifth step of supercritical-drying the aged gel;
- and
- a sixth step of thermal-treating the dried gel initially in an inert atmosphere, and then in air or oxygen atmosphere.
4 more elements
A method of producing a nickel-alumina hybrid aerogel catalyst comprising the steps of:
- a first step of dissolving aluminum alkoxide in a heated alcoholic solvent;
- a second step of adding a mixture of water, acid and alcohol into the thusly prepared solvent and a further step of adding an alcohol solution containing nickel salt into the mixture to form a transparent sol by partial hydrolysis;
- a third step of cooling the transparent sol to room temperature and then adding alcohol containing water to the cooled sol to form a gel;
- a fourth step of aging the gel;
- a fifth step of supercritical-drying the aged gel;
- and
- a sixth step of thermal-treating the dried gel initially in an inert atmosphere and then in air or oxygen atmosphere.
4 more elements
Dependencies are inferred from the claim text.