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Catalyst for Fischer-Tropsch synthesis reaction and preparation method thereof

A Fischer-Tropsch synthesis and catalyst technology, which is used in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc. Increased surface area and improved selectivity

Active Publication Date: 2021-08-31
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, MOFs (Metal-Organic Frameworks), a new emerging metal-organic framework compound, is a complex with a certain spatial structure formed by metal ions and multi-dentate ligands. Because of its high thermal and chemical stability, it has a large The specific surface area and higher dispersed surface activity have attracted widespread attention. In the field of Fischer-Tropsch synthesis, there is an iron-based Fischer-Tropsch synthesis catalyst induced by metal-organic framework material Fe-MIL-101, but there are few research reports on this aspect.

Method used

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  • Catalyst for Fischer-Tropsch synthesis reaction and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Get 3g nanometer red phosphorus, 10.8g ferric chloride (FeCl 3 ·6H 2 O), 2.4g nickel chloride (NiCI 2 ·6H 2 O) adding 25Ml ethanolamine, stirring evenly, ultrasonic treatment for 3h, then transferring the mixed solution to a polytetrafluoroethylene-lined reactor, adding ethanolamine to 80% of the volume, putting it into a blast drying oven, and hydrothermally treating it for 5h, The treatment temperature was 160°C. After the reaction, the product was taken out, cooled to room temperature and filtered, washed three times with ethanol and deionized water and dried to obtain iron nickel phosphide (FeP, Ni 2 P) Nanoparticles, the molar ratio of iron to nickel in the iron-nickel phosphide is Fe:Ni=4:1, and the molar ratio of red phosphorus to iron-nickel is P:(Fe,Ni)=2:1.

[0037] (2) Dissolve 3.93g of iron-nickel phosphide in 36g of deionized water, add 2.31g of deceth-4 phosphate, then add 5.24g of zinc nitrate (Zn(NO 3 )·6H 2 O) stirring at 50° C. in a water bath...

Embodiment 2

[0041] (1) Get 4.5g nanometer red phosphorus, 10.8g ferric chloride (FeCl 3 ·6H 2 O), 2.4g nickel chloride (NiCI 2 ·6H 2 O) adding 25Ml ethanolamine, stirring evenly, ultrasonic treatment for 3h, then transferring the mixed solution to a polytetrafluoroethylene-lined reactor, adding ethanolamine to 80% of the volume, putting it into a blast drying oven, and hydrothermally treating it for 8h, The treatment temperature was 180°C. After the reaction, the product was taken out, cooled to room temperature and filtered, washed 3 times with ethanol and deionized water and dried to obtain iron nickel phosphide (FeP, Ni 2 P), the molar ratio of iron to nickel in the iron-nickel phosphide is Fe:Ni=4:1, and the molar ratio of red phosphorus to iron-nickel is P:(Fe, Ni)=3:1.

[0042] (2) Dissolve 4.93g of iron-nickel phosphide in 36g of deionized water, add 3.89g of deceth-4 phosphate, and then add 5.24g of zinc nitrate (Zn(NO 3 )·6H 2 O) stir 30min under 50 ℃ of water-baths; The 2-m...

Embodiment 3

[0046] (1) Get 6g nanometer red phosphorus, 10.8g ferric chloride (FeCl 3 ·6H 2 O), 2.4g nickel chloride (NiCI 2 ·6H 2 O) Adding 25Ml ethanolamine, stirring evenly, ultrasonic treatment for 3h, then transferring the mixed solution to a polytetrafluoroethylene-lined reactor, adding ethanolamine to 80% of the volume, putting it into a blast drying oven, and hydrothermally treating it for 11h, The treatment temperature was 200°C. After the reaction, the product was taken out, cooled to room temperature and filtered, washed three times with ethanol and deionized water and dried to obtain iron-nickel phosphide (FeP, Ni 2 P), the molar ratio of iron to nickel in the iron-nickel phosphide is Fe:Ni=4:1, and the molar ratio of red phosphorus to iron-nickel is P:(Fe, Ni)=4:1.

[0047] (2) Dissolve 5.93g of iron-nickel phosphide in 36g of deionized water, add 5.87g of deceth-4 phosphate, then add 5.24g of zinc nitrate (Zn(NO 3 )·6H 2 O) stir 30min under 50 ℃ of water-baths; The 2-me...

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Abstract

A novel catalyst for Fischer-Tropsch synthesis and preparation method thereof, the catalyst for Fischer-Tropsch synthesis includes an active component and a carrier, and the active component is iron-nickel phosphide (FeP, Ni 2 P), the carrier is hierarchically porous ZIF‑8, and the mass ratio of each component in the catalyst is (FeP, Ni 2 P): Zn(NO 3 )·6H 2 O: MIM (2‑methylimidazole): H 2 O: C 12 h 29 o 6 P(deceth-4 phosphate)=1:1.06:0.93-1.53:14.6:0.59-1.19. The preparation method is as follows: prepare iron-nickel phosphide magnetic nanoparticles, and then grow porous ZIF-8 on the surface of the nanoparticles in situ. In order to obtain a multi-level porous structure, an anionic surfactant is added to the suspension to obtain a sol-like substance. After the sol is separated, washed and dried, the template agent is removed by extraction with an alkaline solvent and deionized water to obtain a finished product. The catalyst has a high specific surface area, reaching 1300m 2 More than / g, it can not only stabilize the active components and increase the loading capacity of the active components, but also has a flexible pore size distribution, high activity, high stability, easy recovery, etc., and has low methane selectivity and high C 5 + Hydrocarbon selectivity.

Description

technical field [0001] The invention relates to a novel Fischer-Tropsch synthesis catalyst, in particular to a Fischer-Tropsch synthesis iron catalyst containing iron-nickel phosphide. Background technique [0002] Fischer-Tropsch synthesis is based on syngas CO and H 2 As reaction raw materials, the process of synthesizing hydrocarbons and other chemicals under suitable reaction conditions and catalysts. The active components of Fischer-Tropsch synthesis catalysts include Fe, Co, Ni, Ru, etc. Iron-based catalysts can catalyze diesel, gasoline, light olefins (C 2 -C 4 ) and wax, etc., are the most studied ones. As a metal active component, Ni has been studied in synergistic catalysis with iron in recent years. J.B.Butt et al. studied the influence of Ni on the catalytic activity of Fe in Fe-Ni (Fe:Ni=4) alloy catalysts. The results showed that Ni It can inhibit the carbonization of Fe, but does not affect the water-gas shift of Fe. However, during the reaction, the iro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28B01J35/10C10G2/00
CPCB01J31/28B01J35/10C10G2/332
Inventor 刘东门卓武温福山吕毅军蒋瑞雪张宏玉项阳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)