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Supported catalyst, preparation method and applications thereof, and Fischer-Tropsch synthesis method

A supported catalyst, Fischer-Tropsch synthesis technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., to achieve improved stability, improved utilization, high catalysis active effect

Active Publication Date: 2019-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are some problems with the stability of the colloidal catalyst under the actual Fischer-Tropsch synthesis reaction conditions

Method used

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  • Supported catalyst, preparation method and applications thereof, and Fischer-Tropsch synthesis method
  • Supported catalyst, preparation method and applications thereof, and Fischer-Tropsch synthesis method
  • Supported catalyst, preparation method and applications thereof, and Fischer-Tropsch synthesis method

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Embodiment approach

[0045] According to a preferred embodiment of the present invention, the method further includes washing the core-shell structure product obtained in step (2), so that the impurity content of metal elements other than cobalt and group IVB metal elements is not greater than 100 ppm. It can be rinsed or rinsed directly with water or organic solvents. The organic solvent may be, for example, one or more of ethanol, propanol, ethylene glycol, and glycerol.

[0046] The loading of step (3) can adopt various existing methods, for example, can refer to the existing impregnation method, that is, after the core-shell nanostructure obtained in step (2) is dispersed with a dispersion medium to obtain a dispersion liquid, use this dispersion liquid impregnated carrier. The dispersion medium can be a variety of liquid substances that do not dissolve or cause adverse effects on the core-shell nanostructure and the carrier, and can be water or an organic solvent. The organic solvent can be ...

Embodiment 1

[0058] (1) Preparation of zirconium hydroxide colloid

[0059] Mix 268 mL of zirconium oxychloride aqueous solution with a concentration of 0.05 mol / L and 3.84 g of urea, heat up to 85°C for 1 hour, cool to 30°C and age for 8 hours, then centrifugally filter, wash with deionized water three times until the filtrate is washed with silver nitrate The solution was detected without precipitation. TEM of zirconium hydroxide colloid figure 2 shown. figure 1 The TEM shows that the average particle size of zirconium hydroxide colloid is 15nm.

[0060] (2)Co / Zr(OH) 4 Preparation of core-shell structure

[0061] Under the protection of inert gas, in the there-necked flask, the above-mentioned zirconium hydroxide colloid was dispersed in 350ml distilled water, then added 30.8g protective agent PVP-30k (Sinopharm Group, analytically pure) and 6.69g cobalt chloride hexahydrate (Bailingwei, Analytical pure), kept at normal temperature for 15 minutes, after the solid was slowly dissolv...

Embodiment 2

[0069] (1) Titanium hydroxide colloid

[0070] Under the protection of an ice-water bath, 208 mL of TiCl with a concentration of 0.1 mol / L 4 The solution was precipitated with 1.0 wt% ammonia solution to maintain a pH value of 9-11. After aging for 8 hours, it was centrifugally filtered and washed 3 times until the filtrate was detected by silver nitrate solution and no precipitation was formed. TEM shows that the average particle size of titanium hydroxide colloid is 17nm.

[0071] (2)Co / Ti(OH) 4 core-shell structure

[0072] Under the protection of an inert gas, the above-mentioned titanium hydroxide colloid was dispersed in 410ml distilled water, 30.8g protective agent PVP-30k (Sinopharm Group, analytically pure) and 7.0g cobalt acetate tetrahydrate (Bailingwei, analytically pure), and kept for 15 Minutes, after the solid slowly dissolves, use a syringe to quickly inject 80 g of an aqueous solution containing 5.6 g of sodium borohydride (Beijing Reagent, analytically pur...

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Abstract

The invention relates to a supported catalyst, a preparation method and applications thereof, and a Fischer-Tropsch synthesis method, wherein the catalyst comprises a carrier and an active component supported on the carrier, and the active component has a core-shell nanostructure using Co as a shell and using the oxide and / or hydroxide of a group IVB metal element as a core. According to the present invention, the catalyst has advantages of substantially improved cobalt utilization rate, substantially improved stability and substantially improved catalytic performance.

Description

technical field [0001] The invention relates to a supported catalyst, its preparation method and application, and a Fischer-Tropsch synthesis method. Background technique [0002] As global oil resources become more and more scarce, people pay more and more attention to environmental protection, and more and more people pay more and more attention to using coal and natural gas as raw materials to prepare clean fuels and chemicals. Fischer-Tropsch synthesis technology is one of the key technologies for the clean utilization of coal and natural gas. [0003] The main products of the Fischer-Tropsch synthesis reaction in which syngas is converted into hydrocarbons on catalysts include alkanes and olefins, which can be further processed to obtain high-quality liquid fuels and high value-added chemicals. [0004] At present, the supported cobalt-based catalyst is a kind of Fischer-Tropsch synthesis catalyst with industrial application value. Generally, the supported cobalt-base...

Claims

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Application Information

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IPC IPC(8): B01J23/75C10G2/00
Inventor 吴玉晋超孙霞阎振楠李学锋侯朝鹏夏国富李明丰
Owner CHINA PETROLEUM & CHEM CORP
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