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Catalyst for Fischer-Tropsch synthesis by using heteroatom hybridization mesoporous carbon to load cobalt base, preparation method and application

A heterogeneous atom, mesoporous carbon technology, applied in physical/chemical process catalysts, chemical instruments and methods, preparation of liquid hydrocarbon mixtures, etc., can solve the problem of active component cluster growth and low doping amount of mesoporous carbon , Unable to disperse active components, etc.

Inactive Publication Date: 2014-04-02
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

However, the doping amount of the mesoporous carbon prepared by this method is low, and the active components cannot be effectively dispersed in the catalyst carrier.
[0004] Xiong Haifeng et al. (ChemCatChem2010, 2, 514–518) prepared a series of cobalt-supported Fischer-Tropsch synthesis catalysts by preparing nitrogen-doped carbon spheres, and found that the modification of surface nitrogen functional groups helps the self-reduction behavior of oxidized cobalt to occur. In order to improve the activity of the reaction, but the active component has undergone serious cluster growth on the surface of the carrier, resulting in its inactivation

Method used

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  • Catalyst for Fischer-Tropsch synthesis by using heteroatom hybridization mesoporous carbon to load cobalt base, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 3.0g ordered mesoporous silicon SBA-15 (specific surface area is 860m 2 / g, pore size is 6.5nm) placed in a 500ml beaker, 100ml of 20wt.% cyanamide aqueous solution was configured and poured into the beaker, stirred at room temperature for 4h and then centrifuged. Further carbonization treatment in He atmosphere for 5h, the obtained powder was etched with 40wt.% hydrofluoric acid solution to obtain nitrogen hybridized mesoporous carbon. Take 2.0g of mesoporous carbon-nitrogen powder and place it in a reactor, add 340ml of ethanol solution with a concentration of 2mol / L cobalt nitrate for ultrasonic treatment for 2h, and stir the final solution at room temperature until it is dry, then roast it under the protection of helium, 1 ℃ / min was raised to 300℃ for 4 hours to prepare the desired catalyst, the loading of active component cobalt was 17.5wt.%, and the carrier was mesoporous carbon nitrogen.

[0030] The catalytic reaction is carried out in a fixed-bed reactor. Meas...

Embodiment 2

[0032] 3.0g ordered mesoporous silicon SBA-16 (specific surface area is 580m 2 / g, pore diameter of 10.5nm) placed in a 500ml beaker, 32ml of carbon tetrachloride solution of 75wt.% ethylenediamine was poured into the beaker, left at room temperature for 2h, heat treated at 100°C for 8h, and then heated at 600 ℃ in a He atmosphere for 5 h, and the resulting powder was etched with a 10 wt.% hydrofluoric acid solution to obtain nitrogen-doped mesoporous carbon. Take 2.0g of mesoporous carbon nitrogen powder and place it in the reactor, and add 400ml of ethanol solution with a concentration of 0.5mol / L cobalt nitrate for ultrasonic treatment for 2h at the same time, and stir the final solution at room temperature until dry, then roast it under the protection of helium. 0.5°C / min to 300°C for 12 hours to roast the required catalyst, the loading of active components is 10wt.%, and the carrier is mesoporous carbon nitrogen

[0033] The catalytic reaction is carried out in a fixed-b...

Embodiment 3

[0035] 3.0g of ordered mesoporous silicon KIT-6 (with a specific surface area of ​​960m 2 / g, pore diameter is 4.5nm) placed in a 500ml beaker, 8g of 45wt.% polycarbosilane xylene solution was configured and poured into the beaker, left at room temperature for 12h, heat treated at 80°C for 2h, and then heated in a He atmosphere at 800°C After further carbonization treatment for 5 h, the obtained powder was etched with 40 wt.% hydrofluoric acid solution to obtain silicon-hybridized mesoporous carbon. Take 1.7g of mesoporous silicon carbon powder and place it in a reactor, add 200ml of ethanol solution with a concentration of 1mol / L cobalt acetate and ultrasonically treat it for 2h, and stir the final solution at room temperature until it is dry, then roast it under the protection of helium, 2 ℃ / min was raised to 300℃ for 4h to prepare the desired catalyst, the loading amount of the active component was 20wt.%, and the carrier was mesoporous silicon carbide.

[0036] The cataly...

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Abstract

The invention discloses a catalyst for Fischer-Tropsch synthesis by using heteroatom hybridization mesoporous carbon to load cobalt base. The catalyst is characterized by comprising the following materials in percentage by weight: 10-20% of metal cobalt and 80-90% of heteroatom hybridization mesoporous carbon carrier. The catalyst disclosed by the invention has the advantages of high activity and good stability.

Description

technical field [0001] The invention belongs to a catalyst, a preparation method and an application, in particular to a heteroatom hybrid mesoporous carbon-supported cobalt-based Fischer-Tropsch synthesis catalyst, a preparation method and an application. Background technique [0002] Fischer-Tropsch synthesis reaction refers to the conversion of carbon monoxide and hydrogen into hydrocarbons under the catalysis of iron, cobalt, ruthenium and other metals according to a certain ratio. 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, starting from coal, natural gas, biomass and other carbon-containing resources to produce synthesis gas, and then preparing liquid fuel from the synthesis gas through the Fischer-Tropsch reaction, can be achieved within a certain period of t...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/75B01J27/224C10G2/00
Inventor 李德宝杨轶飞贾丽涛侯博王俊刚陈从标
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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