Fischer-Tropsch synthesizing catalyst prepared by carrying cobalt with porous aluminum oxide, preparation method and application

A technology of porous alumina and cobalt loading, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc. Low content and other problems, to achieve good mass and heat transfer performance, rich pore structure, and improve catalytic activity

Active Publication Date: 2016-06-01
中科潞安能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Shell Company uses silica as a carrier, which has poor thermal conductivity and cannot fully exert its catalytic performance in industrial device applications.
Exxon uses titanium oxide as a carrier, but the cobalt loading of the titanium oxide carrier is less than 15%, and the low-temperature calcination strength of the catalyst is low. High-temperature calcination can improve the strength of the catalyst, but it will lead to strong interaction between the metal carrier and affect...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] According to the final catalyst composition, weigh 273.55g of ammonium aluminum carbonate, and prepare it into ammonium aluminum carbonate slurry with a solid content of 18 (wt.)%, then weigh 547.1g of multi-walled carbon nanotubes (8-15nm) as the skeleton. Under ultrasonic vibration, the ammonium aluminum carbonate solution was completely impregnated on the multi-walled carbon nanotubes, and then vacuum-dried at 70°C for 18h to obtain the alumina precursor with a skeleton, which was then calcined in a muffle furnace at 550°C for 8h. Obtain carrier alumina; weigh 75.28g of cobalt nitrate and 5.05g of iron nitrate, impregnate the above-mentioned alumina carrier in equal volume, dry at 60°C for 24h, and roast at 350°C for 4h to obtain the final catalyst. The weight composition of the final catalyst is Co 3 o 4 : Fe 2 o 3 :Al 2 o 3 =25:1:100.

[0019] Take 5ml of the above catalyst without dilution and fill it in a fixed bed reactor (Ф10×500mm). The reduction conditio...

Embodiment 2

[0022] According to the final catalyst composition, 117.65g of pseudo-boehmite was weighed and prepared into a pseudo-boehmite slurry with a solid content of 28 (wt.)%, and then 470.6g of mesoporous carbon (cubic structure) was weighed as the skeleton. Under ultrasonic vibration, the pseudo-boehmite slurry was completely impregnated in mesoporous carbon (cubic structure), and then vacuum-dried at 60°C for 36h to obtain a skeleton-containing alumina precursor, which was then placed in a muffle furnace at 450°C Calcined at low temperature for 12 hours to obtain carrier alumina; Weigh 108.71g of cobalt acetate and 7.78g of nickel nitrate, impregnate the above-mentioned alumina carrier in equal volume, dry at 70°C for 20h, and roast at 300°C for 6h to obtain the final catalyst, the weight of the final catalyst Composed of Co 3 o 4 :NiO:Al 2 o 3 =30:2:100.

[0023] Take 5ml of the above catalyst without dilution and fill it in a fixed bed reactor (Ф10×500mm). The reduction cond...

Embodiment 3

[0026] According to the final catalyst composition, 152.94g of aluminum hydroxide was weighed, prepared into an aluminum hydroxide slurry with a solid content of 10 (wt.)%, and then 382.35g of mesoporous activated carbon (coconut shell) was weighed as the skeleton, and the , the aluminum hydroxide slurry is completely impregnated in the mesoporous activated carbon (coconut shell), and then vacuum-dried at 70°C for 30h to obtain a skeleton-containing alumina precursor, which is then roasted in a muffle furnace at 500°C for 10h to obtain a carrier Alumina: Weigh 108.53g of cobalt nitrate and 9.06g of copper nitrate, impregnate the same volume on the above-mentioned alumina carrier, dry at 80°C for 16h, and roast at 320°C for 5h to obtain the final catalyst. The weight composition of the final catalyst is Co 3 o 4 :CuO:Al 2 o3 =35:3:100.

[0027] Take 5ml of the above catalyst without dilution and fill it in a fixed bed reactor (Ф10×500mm). The reduction conditions are: 390°C, ...

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PUM

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Abstract

A Fischer-Tropsch synthesizing catalyst prepared by carrying cobalt with porous aluminum oxide is prepared from cobaltosic oxide, metal additive oxide and aluminum oxide at the weight ratio of (25-50):(1-10):100.The catalyst has the advantages of being high in activity and stability and capable of being used for Fischer-Tropsch synthesizing reactions with a slurry reactor and a static bed.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis catalyst, its preparation method and its application, in particular to a porous alumina-supported cobalt-based Fischer-Tropsch synthesis catalyst, its preparation method and its application. Background technique [0002] my country's coal-based energy structure has been maintained for a long time, and vigorously develops synthetic oil (CTL) technology that uses coal as raw material to achieve clean coal, optimize deep utilization, and produce ultra-clean liquid engine fuels and advanced lubricants, etc., which can alleviate the world's energy demand and structural conditions contradiction. [0003] Fischer-Tropsch synthetic liquid fuel is nitrogen-free, sulfur-free, and low in aromatic content, and is favored by the market as a clean fuel. At present, countries all over the world have successfully developed synthetic oil technology, the fixed fluidized bed (SAS) and slurry bed (SSPD) process of Sasol...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J23/755B01J35/10B01J32/00B01J21/04C10G2/00
CPCB01J21/04B01J23/002B01J23/75B01J23/755B01J35/10B01J2523/00C10G2/332B01J2523/31B01J2523/842B01J2523/845B01J2523/847B01J2523/17B01J2523/27
Inventor 李德宝刘岩贾丽涛侯博
Owner 中科潞安能源技术有限公司
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