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Application of porous ferric oxide/graphene oxide nano-composite material to catalysis of Fischer-Tropsch synthesis

A nanocomposite, Fischer-Tropsch synthesis technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, nanotechnology, etc., can solve the problem of large size of metal particles, weak interaction and poor stability and other problems, to achieve the effect of high specific surface, high selectivity and uniform size

Active Publication Date: 2018-01-12
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the weak interaction between graphene and metal, the material is difficult to form, and the metal particle size is large, the particle size distribution is uneven, the particles are easy to agglomerate, and the stability is poor, which is rare in the application of industrial catalysts.

Method used

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  • Application of porous ferric oxide/graphene oxide nano-composite material to catalysis of Fischer-Tropsch synthesis
  • Application of porous ferric oxide/graphene oxide nano-composite material to catalysis of Fischer-Tropsch synthesis
  • Application of porous ferric oxide/graphene oxide nano-composite material to catalysis of Fischer-Tropsch synthesis

Examples

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Effect test

Embodiment 1

[0065] Example 1: Preparation of graphene oxide-supported ultrafine iron oxide nanorod composite catalyst and its Fischer-Tropsch synthesis test

[0066] 1. Dissolve ferrous acetate in deionized water, mix and stir until it is completely dissolved, and obtain an aqueous solution of 0.02mol / L ferrous acetate;

[0067] 2. Add 388ml of the ferrous acetate solution obtained in step 1 dropwise into 435mL, 10mg / mL graphene oxide hydrosol, and stir at the same time to obtain a stable and uniform suspension. Among them, the mass ratio of iron element to graphene is 10:100;

[0068] 3. Pour the suspension obtained in step 2 into a hydrothermal reaction kettle, react at a temperature of 120°C for 12 hours, naturally cool to room temperature, wash with deionized water for 5 times and perform suction filtration to obtain graphene oxide Composite with hydrated iron oxide nanoparticles, and finally dried in a vacuum (0.1Pa) oven at 60°C for 12h. Obtained graphene oxide-supported ultrafine...

Embodiment 2

[0073] Example 2: Preparation of graphene oxide-supported ultrafine iron oxide nanorod composite catalyst and its Fischer-Tropsch synthesis test

[0074] 1. Dissolve ferrous chloride in absolute ethanol, mix and stir until it is completely dissolved, and obtain an ethanol solution of 0.03mol / L ferrous chloride;

[0075] 2. Add 147ml of the iron salt solution obtained in step 1 dropwise into 225mL, 10mg / mL graphene oxide hydrosol, and stir at the same time to obtain a stable and uniform suspension. Among them, the mass ratio of iron element to graphene is 11:100;

[0076] 3. Pour the suspension obtained in step 2 into a hydrothermal reaction kettle, react at a temperature of 130°C for 24 hours, naturally cool to room temperature, wash with deionized water for 5 times and perform suction filtration to obtain graphene oxide Composite with hydrated iron oxide nanoparticles, and finally dried in an oven at 80°C for 12h. Obtained graphene oxide-supported ultrafine iron oxide nanor...

Embodiment 3

[0080]Example 3: Preparation of graphene oxide-supported ultrafine iron oxide nanorod composite catalyst and its Fischer-Tropsch synthesis test

[0081] 1. Dissolve ferrous sulfate in dimethylformamide, mix and stir until it is completely dissolved, and obtain a solution of 0.05mol / L ferrous sulfate;

[0082] 2. Add 289ml of the iron salt solution obtained in step 1 dropwise into 450mL, 10mg / mL graphene oxide hydrosol, and stir at the same time to obtain a stable and uniform suspension. Among them, the mass ratio of iron element to graphene is 18:100;

[0083] 3. Pour the suspension obtained in step 2 into a hydrothermal reaction kettle, react at a temperature of 130°C for 24 hours, naturally cool to room temperature, wash with deionized water for 5 times and perform suction filtration to obtain graphene oxide Composite with hydrated iron oxide nanoparticles, and finally in a quartz tube furnace at 100 °C in CO 2 Dry under atmosphere for 12h. Obtained graphene oxide-support...

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Abstract

The invention discloses application of a porous ferric oxide / graphene oxide nano-composite material to catalysis of Fischer-Tropsch synthesis. The porous ferric oxide / graphene oxide nano-composite material can be applied to catalysis of Fischer-Tropsch synthesis. The porous ferric oxide / graphene oxide nano-composite material is prepared according to the following steps: (1) preparing a solution ofinorganic iron salt; (2) adding the solution of the inorganic iron salt into hydrosol of graphene oxide to obtain suspension liquid; and (3) performing hydrothermal reaction on the suspension liquidto obtain a ferric oxide hydrate nano-particle and graphene oxide compound, and drying and calcining sequentially. The porous ferric oxide / graphene oxide nano-composite material can be applied to catalysis of Fischer-Tropsch synthesis. The prepared catalyst has high wear capacity (the wear rate is lower than 2%.h<-1>), high CO conversion rate (90 percent), high heavy hydrocarbon C5+ selectivity (50 percent) and high stability.

Description

technical field [0001] The invention relates to the application of a porous iron oxide / graphene oxide nanocomposite material in catalytic Fischer-Tropsch synthesis, belonging to the technical field of catalysts. Background technique [0002] Fischer-Tropsch synthesis is a reaction process that converts synthesis gas into a mixture of hydrocarbons of different chain lengths and small amounts of organic oxygenates. The coal gasification is made into synthesis gas, after purification and adjustment of H 2 / CO is then catalyzed to synthesize liquid fuels. Under different catalysts and reaction conditions, organic compounds such as alkanes, alkenes, alcohols, aldehydes, and acids can be produced. Fischer-Tropsch synthesis catalysts are mainly Fe, Co, Ni and Ru. Iron-based catalysts have been extensively studied due to their superior water gas conversion activity, wide operating temperature range, and low cost and availability, and have been put into industrial applications. S...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J37/08B01J37/10B01J37/16B82Y30/00B82Y40/00C10G2/00
Inventor 张成华魏宇学杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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