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US 2026/0225075 A1Published application
Supported ru catalysts highly efficient for carbon dioxide methanation, methods of preparation and uses thereof
AssigneeGaznat SA
InventorsLIPING ZHONG, ANDREAS ZÜTTEL
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Abstract
The invention relates to a method for the preparation of supported Ru nanoparticles material, in particular Ru/Al2O3 and heterogenous catalyst comprising Ru metal particles and Al2O3 useful in CO2 methanation.
Claims21
1-20. (canceled)
A method for the preparation of Al2O3 supported Ru particles comprising the steps of:
- a) Providing a porous Al2O3 support material which has been pre-treated in an ammonia solution;
- b) Providing a ruthenium precursor solution comprising soluble ruthenium salts in aqueous solution, wherein the Ru mass content in the Ru precursor solution is from about 0.1 g/L to about 5 g/L;
- c) Impregnating the surface of the said pre-treated Al2O3 support material with the ruthenium precursor solution by incipient wetness impregnation;
- d) Drying the obtained impregnated Ru/Al2O3 material;
- e) Subjecting the dried impregnated Ru/Al2O3 material to temperature treatment under an H2 atmosphere to reduce the ruthenium precursor into Ru metal phase;
- f) Contacting the obtained Ru/Al2O3 material to an ammonia solution;
- and
- g) Drying the obtained ammonia-treated Ru/Al2O3 material.
5 more elements
A heterogenous catalyst comprising Ru metal particles and Al2O3, wherein said catalyst has a mass loading of Ru from 0.1% wt to 2.5% wt and a size of Ru particles less than 2 nm.
Dependencies are inferred from the claim text.