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US 8,946,108 B2Granted
Slurry bed Fischer-Tropsch catalysts with silica/alumina structural promoters
AssigneeRes USA, LLC
InventorsDawid J. Duvenhage, Belma Demirel
Life of this patent
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AssigneeRes USA, LLC
InventorsDawid J. Duvenhage, Belma Demirel
Estimating the term…
A structurally promoted, precipitated, Fischer-Tropsch catalyst that exhibits an RCAI-10 of 0-2.8 and/or produces less than 6 wt % fines after 5 hours ASTM Air Jet Attrition testing, due to formation via: preparing a nitrate solution by forming at least one metal slurry and combining the at least one metal slurry with a nitric acid solution; combining the nitrate solution with a basic solution to form a precipitate; structurally promoting the precipitate with at least one source of silicon to form a promoted mixture, wherein promoting comprises combining the precipitate with (a) silicic acid and one or more component selected from the group consisting of non-crystalline silicas, crystalline silicas, and sources of kaolin or (b) a component selected from the group consisting of non-crystalline silicas and sources of kaolin, in the absence of silicic acid; and spray drying the promoted mixture to produce catalyst having a desired particle size.
A structurally promoted, precipitated, Fischer-Tropsch catalyst that exhibits an RCAI-10 in the range of from about 0 to about 2.8, produced by a method comprising:
The Fischer-Tropsch catalyst of 1 wherein, upon calcination, the calcined catalyst has a surface area of at least 70 m2/g, a pore volume in the range of from about 0.2 and 0.3, an average pore size in the range of from 50 and 78 Å, or a combination thereof.
A structurally promoted, precipitated, Fischer-Tropsch catalyst that produces less than 6 weight percent fines after 5 hours ASTM Air Jet Attrition testing, due to formation via:
A structurally promoted, precipitated Fischer-Tropsch catalyst comprising a weight ratio of Fe:SiO2 in the range of from about 100:5 to about 100:25, a weight ratio of Fe:K in the range of from about 100:2 to about 100:5, and a weight ratio of Fe:Cu in the range of from about 100:2 to about 100:5, wherein silicon is incorporated into the catalyst by structural promotion of an iron-based catalyst precipitate with up to 5 weight percent silicic acid, with any balance of the silicon in the catalyst being incorporated by structural promotion with another silicon source selected from the group consisting of non-crystalline silicas, crystalline silicas, and sources of kaolin.
Dependencies are inferred from the claim text.