A zirconium-modified amorphous mesoporous SiO 2 Supported cobalt-based Fischer-Tropsch catalyst and preparation method thereof

A catalyst and cobalt-based technology, applied in the field of catalysis, can solve the problems of low specific surface area of ​​the carrier, lack of transition metal additives, low conversion rate of CO, etc., and achieve the effects of improving selectivity, enhancing stability, and improving catalytic activity

Active Publication Date: 2022-03-01
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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  • A zirconium-modified amorphous mesoporous SiO <sub>2</sub> Supported cobalt-based Fischer-Tropsch catalyst and preparation method thereof
  • A zirconium-modified amorphous mesoporous SiO <sub>2</sub> Supported cobalt-based Fischer-Tropsch catalyst and preparation method thereof
  • A zirconium-modified amorphous mesoporous SiO <sub>2</sub> Supported cobalt-based Fischer-Tropsch catalyst and preparation method thereof

Examples

Experimental program
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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 it 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 transferre...

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. A one-pot method for the preparation of zirconium-doped amorphous mesoporous silica support Zr‑SiO 2 , and then the cobalt precursor was loaded onto the surface of the support by impregnation method to obtain Co(NO 3 ) 2 / Zr-SiO 2 , after roasting in a muffle furnace, Co 3 o 4 / Zr-SiO 2 , reduced in a reducing atmosphere, and finally produced Co / Zr‑SiO 2 Compared with the existing Fischer-Tropsch catalyst, the carrier has a higher specific surface area, and the finished catalyst has a higher conversion rate of CO and a higher yield of hydrocarbon products with five carbons and above than the existing catalyst.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01J35/10C10G2/00
CPCB01J23/75B01J35/1023B01J35/1042B01J35/1061C10G2/332
Inventor 刘岳峰朴宇昂蒋倩
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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