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Zirconium-modified amorphous mesoporous SiO2-supported cobalt-based Fischer-Tropsch catalyst and preparation method thereof

A catalyst, cobalt-based technology, applied in the field of catalysis, can solve the problems of low conversion rate of CO, lack of transition metal additives, low specific surface area of ​​the carrier, etc.

Active Publication Date: 2021-02-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of addition of transition metal additives and the low specific surface area of ​​the carrier, acidic sites are not further introduced, making its CO conversion rate lower than the catalyst activity described in this patent

Method used

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  • Zirconium-modified amorphous mesoporous SiO2-supported cobalt-based Fischer-Tropsch catalyst and preparation method thereof
  • Zirconium-modified amorphous mesoporous SiO2-supported cobalt-based Fischer-Tropsch catalyst and preparation method thereof
  • Zirconium-modified amorphous mesoporous SiO2-supported cobalt-based Fischer-Tropsch catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] One-pot method: Weigh 1.8g of zirconium isopropoxide and 21.2g of ethyl orthosilicate and fully dissolve them in a plastic beaker, wherein the molar ratio of Si to Zr is 25, stir for 20 minutes to fully dissolve and mix evenly, called mixing liquid armor. 15.3g of triethanolamine and 11.5g of deionized water were mixed and stirred for 30 minutes to make them fully stirred evenly, which was called mixed solution B. Add the mixed solution B dropwise to the mixed solution A, and stir for more than 20min to make it fully mixed. Finally, 21.8g of tetramethylammonium hydroxide was added dropwise into the mixed solution prepared in the previous step, and stirred thoroughly until gelling. The gelled solid was transferred to a watch glass, dried in an oven at 60°C for 12 hours, and then transferred to a vacuum oven at 60°C for 12 hours. The obtained solid was transferred to a polytetrafluoroethylene hydrothermal kettle, hydrothermally treated at 180°C for 3h, and then transfer...

Embodiment 2

[0052] One-pot method: Weigh 0.23g of zirconyl nitrate and 21.2g of ethyl orthosilicate and fully dissolve them in a plastic beaker, wherein the molar ratio of Si to Zr is 100, stir for 20 minutes to fully dissolve and mix evenly, called a mixed solution First. 17.2g of trimethylamine and 13.2g of deionized water were mixed and stirred for 90 minutes to make them fully stirred evenly, which was called mixed solution B. Add the mixed solution B to the mixed solution A dropwise, and stir for more than 20 minutes to fully mix to obtain the mixed solution C. Finally, 21.8 g of tetramethylammonium hydroxide was added dropwise into the mixed solution C, and stirred thoroughly until gelling. The gelled solid was transferred to a watch glass, dried in an oven at 80°C for 12 hours, and then transferred to a vacuum oven at 80°C for 12 hours. The obtained solid was transferred to a polytetrafluoroethylene hydrothermal kettle, hydrothermally treated at 200°C for 2h, and then transferred...

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Abstract

The invention discloses a supported cobalt-based Fischer-Tropsch catalyst and a preparation method thereof, and relates to a catalyst containing cobalt. According to the method, a zirconium-doped amorphous mesoporous silica carrier ZrSiO2 is prepared through a one-pot method, then a cobalt precursor is loaded to the surface of the carrier through an impregnation method to obtain Co(NO3)2 / Zr-SiO2,Co3O4 / Zr-SiO2 is obtained after calcination in a muffle furnace, Co3O4 / Zr-SiO2 is reduced in a reducing atmosphere, and finally Co / Zr-SiO2 is obtained. Compared with an existing Fischer-Tropsch catalyst, the carrier has a relatively high specific surface area, and compared with the existing catalyst, the finished catalyst has higher CO conversion rate and higher yield of hydrocarbon products withfive or more carbon atoms.

Description

technical field [0001] The invention belongs to the field of catalysis, in particular to a zirconium-modified amorphous mesoporous SiO 2 Supported cobalt-based Fischer-Tropsch catalyst and its preparation and application in Fischer-Tropsch synthesis. [0002] technical background [0003] The Fischer-Tropsch synthesis reaction is a process in which the main components of synthesis gas are carbon monoxide and hydrogen, which are converted into long-chain hydrocarbons through a catalyst. The reaction equation is: CO+H 2 →C n h 2n+2 +nH 2 O. It is generally believed that the products of the Fischer-Tropsch synthesis reaction are restricted by the distribution of ASF (Anderson-Schulz-Flory), and there are restrictions on the selectivity of the types of products, and it is difficult for conventional catalysts to break the distribution of ASF. Reducing the selectivity of methane and increasing the selectivity of heavy hydrocarbons, especially the selectivity of C5+ products, i...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J35/10C10G2/00
CPCB01J23/75C10G2/332B01J35/617B01J35/635B01J35/647
Inventor 刘岳峰朴宇昂蒋倩
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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