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Cobalt group catalyst synthesized with fischer tropsch process, production method and application thereof

A cobalt-based catalyst, Fischer-Tropsch synthesis technology, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, catalysts for physical/chemical processes, etc. simple craftsmanship

Inactive Publication Date: 2008-09-24
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The treatment of the catalyst in the above patents and documents can improve the reactivity of the catalyst, but it cannot optimize the product distribution and improve the C 5 + selectivity

Method used

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  • Cobalt group catalyst synthesized with fischer tropsch process, production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 7.4 grams of cobalt nitrate hexahydrate, dissolve it in 20 mL of deionized water, obtain a uniform solution, and use commercial silica gel as a carrier (specific surface area 176m 2 / g, average pore diameter 11.32nm), according to 15% Co / SiO 2 Catalyst composition Add 8.49 grams of commercial silica gel to the prepared solution, stir evenly, let it stand at room temperature for 90 hours, then dry it in a vacuum oven at 50°C for 100 hours, grind the dried solid thoroughly, and bake it in air at 600°C 3h, slowly heat up the calcined solid powder to 300°C for 60h reduction treatment in hydrogen atmosphere, reduction pressure 0.8MPa, reduction space velocity 100h -1 (V / V), naturally cool after the reduction, and switch to CO passivation gas passivation for 10 hours after the temperature drops to 250°C. The passivation pressure and space velocity are the same as the reduction process. The treated solid powder is compressed into tablets, and the 40-80 mesh components ...

Embodiment 2

[0031] Weigh 4.94 grams of cobalt nitrate hexahydrate, dissolve it in 20 mL of absolute ethanol to obtain a homogeneous solution, use ZSM-5 molecular sieve as a carrier (pore diameter is 0.51*0.55nm), and mix 9.03 grams of Add ZSM-5 molecular sieves to the prepared solution, stir evenly, let stand at room temperature for 12 hours, dry in a vacuum oven at 50°C for 100 hours, grind the dried solids thoroughly, and roast them in air at 300°C for 24 hours. The final solid powder is slowly heated to 400°C in a hydrogen atmosphere, the reduction pressure is 0.3MPa, and the reduction space velocity is 5000h -1 Under the conditions of (V / V), carry out the reduction treatment for 3h, and switch to CO and H with a volume percentage of CO of 99%. 2 The composition of the mixed gas is at 400°C, the reduction pressure is 0.3MPa, and the reduction space velocity is 5000h -1 Reduction treatment under (V / V) conditions for 3h, then natural cooling, switch to O after cooling down to 20°C 2 20...

Embodiment 3

[0034] Weigh 2.47 grams of cobalt nitrate hexahydrate, dissolve it in a mixed solution of 20 mL of methanol and ethanol to obtain a uniform solution, use the Y-type molecular sieve obtained by ion exchange as a carrier (average pore size is 0.74 nm), and use a 5% Co / HY catalyst composition Add 9.50 g of HY to the prepared solution, stir evenly, let it stand at room temperature for 90 hours, dry it in a drying oven at 120°C for 12 hours, grind the dried solid thoroughly, and roast it in air at 600°C for 3 hours. The solid powder is slowly heated to 300°C in a CO atmosphere, the reduction pressure is 0.0MPa, and the reduction space velocity is 1000h -1 Under (V / V) conditions, carry out the reduction treatment for 30 hours, and then switch to CO and H with a CO volume percentage of 1%. 2 The mixed gas is at 300°C, the reduction pressure is 0.0MPa, and the reduction space velocity is 1000h -1 Reduction treatment under (V / V) conditions for 30h, natural cooling until it drops to 10...

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Abstract

The invention relates to a fischer-tropsch cobalt-based catalyst composed of an active component and a carrier, wherein, the metal cobalt accounts for 5-35 percent, and the carrier accounts for 65-95 percent of the catalyst which is made by a method of impregnation. The fischer-tropsch cobalt-based catalyst has the advantages of improving the reactivity of the catalyst and optimizing the distribution of products as well as increasing the selectivity for C5<+>; besides, the fischer-tropsch cobalt-based catalyst has simple process and is suitable for mass industrial production.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis catalyst, its preparation method and application, in particular to a cobalt-based Fischer-Tropsch synthesis catalyst, its preparation method and application. Background technique [0002] Fischer-Tropsch synthesis reaction refers to the conversion of carbon monoxide and hydrogen (synthesis gas) into hydrocarbons under the catalysis of iron, cobalt, ruthenium and other metals. It is the indirect conversion of coal and natural gas into clean chemicals (gasoline, diesel, alcohols, etc.) core process. Due to the increasing depletion of petroleum resources, while coal, natural gas, biomass and other resources are relatively abundant, the production of syngas from carbon-containing resources such as coal, natural gas, and biomass, and then the synthesis of liquid fuels from the syngas through Fischer-Tropsch can be achieved to a certain extent. Alleviating dependence on oil resources is of great significa...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J35/04C07C1/04C10G2/00
Inventor 孙予罕穆仕芳李德宝贾丽涛侯博
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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