Steam reforming catalyst and method of making thereof
The invention provides a method for the production of a supported nickel catalyst, in which an aqueous mixture comprising an alkali metal salt plus other metal salts is sintered to form a support material. A supported nickel catalyst comprising potassium β-alumina is also provided.
1. A supported nickel catalyst comprising nickel supported on a support material, wherein said support material comprises potassium β-alumina or sodium β-alumina, or mixtures thereof, wherein said support material comprises a pore volume of at least 180 ml/kg as determined by HG porosimetry, and wherein said support material comprises 8 wt % or more potassium β-alumina, as measured by XRD.
2. The supported nickel catalyst according to claim 1 , wherein the supported nickel catalyst comprises 0.2-2 wt % potassium.
3. The supported nickel catalyst according to claim 1 , wherein said support material comprises 0.5-2.5 wt % potassium oxide, 70-80 wt % aluminum oxide, 0-8 wt % calcium oxide, and 10-24 wt % magnesium oxide.
4. The supported nickel catalyst according to claim 3 , wherein said support material comprises calcium oxide.
5. The supported nickel catalyst according to claim 1 , wherein said support material comprises 8 wt % or more potassium β-alumina, 30-90 wt % magnesium alumina spinel, 0-60 wt % grossite and/or hibonite, and α-alumina, as measured by XRD.
6. The supported nickel catalyst according to claim 5 , wherein said support material comprises at least one of grossite and hibonite.
7. The supported nickel catalyst according to claim 1 , wherein the potassium β-alumina comprises K 1.62 Mg 0.62 Al 10.38 O 17 or K 2 Mg 4 Al 30 O 50 phases, as determined by XRD analysis.
8. The supported nickel catalyst according to claim 1 , wherein said support material comprises sodium β-alumina as determined by XRD analysis.
9. The supported nickel catalyst according to claim 1 , wherein said support material comprises a mixture of potassium β-alumina and sodium β-alumina.
10. Use of a supported nickel catalyst according to claim 1 as a catalyst in a steam reforming process.