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Porous carbon supported Fischer-Tropsch synthesis catalyst as well as preparation method and application thereof

A Fischer-Tropsch synthesis and catalyst technology, which can be used in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, catalysts for physical/chemical processes, etc., and can solve problems such as high production costs, unsuitable for large-scale industrial production, and long preparation process routes.

Active Publication Date: 2018-03-06
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chen et al implanted iron nanoparticles into carbon nanotubes (CNTs) by chemical cage opening method (Wei Chen, Zhongli Fan, et al., Journal of American Chemical Society 130(2008) 9414-9419), this Fe@CNT The iron nanoparticles of the catalyst are uniform in size, have high activity and excellent product selectivity in the Fischer-Tropsch synthesis reaction, but the preparation process of this method is long, the production cost is high, and it is not suitable for large-scale industrial production

Method used

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  • Porous carbon supported Fischer-Tropsch synthesis catalyst as well as preparation method and application thereof
  • Porous carbon supported Fischer-Tropsch synthesis catalyst as well as preparation method and application thereof
  • Porous carbon supported Fischer-Tropsch synthesis catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Take by weighing 44.7g terephthalic acid (H 2 BDC), 1179g N,N-dimethylformamide (DMF), 71.5g cobalt sulfate heptahydrate and 4.1g manganese sulfate, mixed, stirred until dissolved, transferred to a hydrothermal synthesis kettle, hydrothermally synthesized at 150°C for 36h, filtered , washing, and drying to obtain the CoMn-BDC organic carboxylic acid copolymer precursor (belonging to the 4th) kind of precursor), and its BET specific surface area is 331m 2 / g. Take by weighing potassium nitrate 1.5g and deionized water 44g to be mixed with solution, this solution is mixed with the prepared CoMn-BDC organic carboxylic acid copolymer precursor, dry, at 50% C 2 h 4 / 50%N 2 Carbonize at 600°C for 2h in airflow to obtain carbon-coated CoMn nanocomposites. The carbon-coated CoMn nanocomposite was kneaded with 48.0 g methylcellulose and extruded into strips with a diameter of 1 mm. 2 It was dried at 120°C in the atmosphere and calcined at 400°C to obtain a catalyst, marked ...

Embodiment 2

[0092] Weigh 25.2g of 2,5-dihydroxyterephthalic acid, 63.4g of cobalt acetate tetrahydrate, 27.5g of tetrahydrofuran, and 18.3g of deionized water, stir well until dissolved, transfer to a hydrothermal synthesis kettle, and crystallize at 110°C for 72h , the resulting product is filtered, washed, and dried to finally obtain a CPO-27-Co metal-organic framework material precursor (belonging to the fifth) precursor). Put the CPO-27-Co precursor at 20%C 2 h 6 Carbon-coated Co nanocomposites were obtained by carbonizing at 850°C for 1 h in 80% Ar gas flow. Carbon-coated Co nanocomposites were kneaded with 25.0 g of ethyl cellulose and extruded into strips with a diameter of 1 mm. 2 It was dried at 120°C in the atmosphere and calcined at 450°C to obtain a catalyst, which is marked as Exam-2. The mass composition of catalyst elements is: Co / C=24.5:100, and its texture properties, dispersion, reduction and wear index are listed in Table 1. The Fischer-Tropsch synthesis performance...

Embodiment 3

[0094] Weigh 24.7g cobalt nitrate hexahydrate, 5.18g 50% manganese nitrate solution, 0.01g platinum chloride, 50g starch, 8g ionized water (belonging to the 3rd kind of precursor), fully stir and mix to obtain a mixture of metal and carbonaceous substance Precursors, extruded into bars with a diameter of 1 mm, dried, and then heated at 20% C 3 h 6 Carbonization at 700° C. for 1 h in 80% Ar flow to obtain a catalyst, marked as Exam-3. The element mass composition of the catalyst is: Co / Mn / Pt / C=35.5:1.1:0.04:100, and its texture properties, dispersion degree, reduction degree and wear index are listed in Table 1.

[0095] The Fischer-Tropsch synthesis performance test was carried out in the same manner as in Example 1, and the results are listed in Table 2.

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Abstract

The invention discloses a porous carbon supported Fischer-Tropsch synthesis catalyst as well as a preparation method and application thereof. The Fischer-Tropsch synthesis catalyst comprises an activephase metal and a porous carbon carrier, wherein the porous carbon carrier is porous graphite or a graphene nano-capsule; the active phase metal is entrapped in a cavity of the porous graphite or graphene nano-capsule; and the active phase metal is selected from at least one of VIIIB family transition metals. The catalyst provided by the invention shows excellent electronic properties, high thermal conductivity, physical and chemical wear resistance, high hydrothermal stability and high mechanical strength in Fischer-Tropsch synthesis application, and rich nano porous structures of the catalyst can promote high dispersion of active phases of the catalyst and diffusion of reaction species, so that the catalyst has excellent Fischer-Tropsch synthesis reaction properties: high activity, lowmethane selectivity and long running life.

Description

technical field [0001] The invention relates to a porous carbon-supported Fischer-Tropsch synthesis catalyst, a preparation method and application thereof, and belongs to the field of Fischer-Tropsch synthesis catalysis. Background technique [0002] Syngas (contains CO and H 2 , a small amount of CO 2 , methane and N 2 The mixed gas) can be converted into hydrocarbon compounds under the action of catalyst. This reaction is called Fischer-Tropsch synthesis, and the Group VIIIB transition metals iron, cobalt, nickel, and ruthenium are active components of catalysts commonly used in this reaction. [0003] The Fischer-Tropsch synthesis reaction is a reaction of high temperature (150-350°C), high pressure (10-50bar), and strong exotherm (165kJ / mol). A major by-product of this reaction is water. At present, the reactors suitable for Fischer-Tropsch synthesis mainly include fixed bed, fixed fluidized bed and gas-liquid-solid three-phase slurry bed. Therefore, Fischer-Tropsc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/75B01J23/78B01J23/889B01J35/10C10G2/00
CPCB01J23/46B01J23/75B01J23/78B01J23/889C10G2/00B01J35/60
Inventor 张成华马彩萍魏宇学王虎林郑洪岩杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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