FISCHER-TROPSCH CATALYST ENHANCEMENT

• Main Authors: LAPIDUS, ALBERT, L'VOVICH, DAAGE, MICHAEL, A, KRYLOVA, ALLA, JURIEVNA, SINEVA, LILIA VADIMOVNA, KOVEAL, RUSSELL, JOHN
• Format: Patent
• Language: English; French; German
• Published: 07.03.2007
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR RELEVANT APPARATUS; TRANSPORTING

A process of enhancing both the activity and the methane selectivity of a particulate Dispersed Active Metal ("DAM") hydrogenation catalyst is disclosed wherein the DAM undergoes low temperature oxidation in a slurry phase to form a stable, unique oxidized catalyst precursor that is subsequently reduced to form an enhanced catalyst by treatment with hydrogen-containing gas at elevated temperature, wherein one or more promoter metal oxides of chromium, lanthanum and manganese are added to the DAM. Precursors of the promoter metal oxides may be combined with the DAMs prior to or during formation of the initial slurry, during the oxidation step or between recovery of the oxidized catalyst precursor and treatment of it with hydrogen-containing gas to reactivate the catalyst. Conversion of the precursors to the promoter metal oxides is carried out prior to the treatment with hydrogen-containing gas unless said treatment itself produces the conversion.