Chemicals from synthesis gas
OwnerThulani Humphrey Dlamini, Rafael Luis Espinoza +3inventors
InventorsThulani Humphrey Dlamini, Rafael Luis Espinoza, Genevieve Joorst, Masikana Millan Mdleleni, Jacobus Lucas Visagie
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Abstract
This invention relates to an iron-based Fischer-Tropsch cataylst composition wherein the iron phase is ferrihydrite. The catalyst composition optionally includes a structural promoter which may be selected from manganese or chromium or a mixture thereof and chemical promoters selected from magnesium, zinc, copper and an alkaline or alkali metal such as potassium. The catalyst is best bound to a refractory oxide support such as silica. This catalyst composition produces significant yields of higher parafins, olefins and alcohols.
Claims43
An iron-based Fischer-Tropsch catalyst composition wherein the main iron phase is ferrihydrite.
An iron-based catalyst composition according to any one of the preceding claims with a surface area from 50 to 200 m2/g, as determined by the BET surface area measurement technique.
An iron-based catalyst composition according to claim comprising, by mass of the composition:
- 35%-60% Fe,
- 0%-15% Mn,
- 3%-10% Zn,
- 0.5%-2% Cu,
- 0.5%-2% K2O.
A process for preparing an iron-based catalyst composition which consists mainly of ferrihydrite, the process including precipitation of Fe ions from a solution of a polar solvent in the presence of a precipitating agent, followed by drying and calcination of the catalyst.
Dependencies are inferred from the claim text.