Hollow Fe2O3 coated carbon catalyst as well as preparation method and application thereof

A carbon catalyst, fe2o3 technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problems of toxicity, human harm, etc. Catalytic performance, effect of large specific surface area

Pending Publication Date: 2022-01-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN107043133 A discloses a flower-shaped γ-Fe 2 o 3 The preparation method of microspheres, the solution used in the preparation process is the same as glycerol solution, which has certain toxicity and is harmful to human body

Method used

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  • Hollow Fe2O3 coated carbon catalyst as well as preparation method and application thereof
  • Hollow Fe2O3 coated carbon catalyst as well as preparation method and application thereof
  • Hollow Fe2O3 coated carbon catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Hollow Fe 2 o 3 Preparation of Coated Carbon (MIL-88A+K) Catalyst

[0029] 1) Fe 2 o 3 Preparation of hollow microspheres: FeCl 3 ·6H2 O 4.56g, sodium citrate 9.6g, urea 1.65g were dissolved in 80ml of deionized water and stirred for 30min, then added 0.8g of polyvinylpyrrolidone (ie pvp) and continued to stir for 1h, then hydrothermally reacted at 100°C for 24h to obtain hollow Fe 2 o 3 Microspheres, Fe in the following examples 2 o 3 Hollow microsphere preparation method is with embodiment 1;

[0030] 2) 1g Fe 2 o 3 Hollow microspheres and 0.5804g C 4 h 4 o 4 Dissolve in 25mL deionized water, then add 1.3515g FeCl 3 ·6H 2 O was stirred until completely dissolved, washed by centrifugation, and dried at 80°C to obtain the product;

[0031] 3) Dissolve 4.05g of the product in step 2) in 120mL of 1M glucose solution, heat it in water at 180°C for 12h, wash the product by centrifugation and dry it at 80°C to obtain hollow Fe 2 o 3 Coated carbon c...

Embodiment 2

[0034] with hollow Fe 2 o 3 Coated carbon (MIL-88B) catalyst is an example, and its preparation method is as follows:

[0035] 1) Add 1gFe 2 o 3 Hollow microspheres and FeCl 3 ·6H 2 O (16mL 40mM) ethanol solution was mixed evenly at room temperature, and the solution was added terephthalic acid (16mL 20mM) ethanol solution in an ultrasonic device at 70°C, and after mixing evenly, it was centrifugally washed and dried at 80°C; In 120mL of 1M fructose solution, heated at 180°C for 12h, the obtained product was washed by centrifugation and dried at 80°C to obtain hollow Fe 2 o 3 Coating carbon catalyst precursors;

[0036] 2) The obtained hollow Fe 2 o 3 The coated carbon catalyst precursor was calcined at 450 °C (heating rate 1 °C / min) in air atmosphere for 5 hours to obtain the final product hollow Fe 2 o 3 Coated carbon (MIL-88B) catalyst.

Embodiment 3

[0038] Hollow Fe 2 o 3 The preparation method of coated carbon (MIL-100) catalyst is as follows:

[0039] 1) Add 1gFe 2 o 3 Hollow microspheres and FeCl 3 ·6H 2 O (16mL 40mM) ethanol solution was mixed evenly at room temperature, and the solution was added triformic acid (16mL 40mM) ethanol solution in a 70°C ultrasonic device, after mixing evenly, it was washed by centrifugation and dried at 80°C; 4.05g of the product from the previous step was dissolved in 120mL 1M sucrose solution, heated at 180°C for 12 hours, centrifuged, washed and dried at 80°C to obtain hollow Fe 2 o 3 Coating carbon catalyst precursors;

[0040] 2) Then obtain hollow Fe 2 o 3 Coated carbon catalyst precursor; the final product, hollow Fe 2 o 3 Coated carbon (MIL-101) catalyst.

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Abstract

The invention discloses a hollow Fe2O3 coated carbon catalyst as well as a preparation method and application thereof. The preparation method comprises the steps of mixing hollow Fe2O3 microspheres and MOF material raw materials, then centrifugally washing and drying, then adding the mixture into a saccharide solution to be subjected to a hydrothermal reaction, obtaining a hollow Fe2O3 coated carbon catalyst precursor, adding the precursor into a soluble metal M salt solution for dipping, and then roasting or directly roasting to obtain the hollow Fe2O3 coated carbon catalyst. The prepared catalyst is of a hollow structure and has a large specific surface area, the confinement effect of the hollow structure can be effectively utilized, the contact area of an iron element and synthesis gas is increased, meanwhile, the retention time of the synthesis gas in the hollow structure of the catalyst can be prolonged, and then the yield of the target product C5 + hydrocarbon is effectively increased; and the catalyst shows good catalytic performance in a Fischer-Tropsch synthesis reaction, and meanwhile, the conversion rate of carbon monoxide and the selectivity of a target product C5 + hydrocarbon are improved.

Description

technical field [0001] The invention relates to the technical field of high-carbon hydrocarbon catalysts produced by Fischer-Tropsch synthesis, in particular to a hollow Fe catalyst suitable for high-carbon hydrocarbons produced by Fischer-Tropsch synthesis. 2 o 3 Coated carbon catalysts and methods of preparation and applications thereof. Background technique [0002] Human society and economy have achieved rapid development, but this also consumes a lot of fossil energy. Since the beginning of the 21st century, oil reserves have declined severely, and people urgently need to find a new method of oil production, which combines synthesis gas (CO and H 2 The Fischer-Tropsch synthesis (FTS) conversion of liquid hydrocarbon fuels has attracted more and more attention, and iron-based catalysts have been widely used for their good ability to produce hydrocarbons in Fischer-Tropsch synthesis. At the same time, the research and application of hollow structure nanomaterials have ...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J35/10C10G2/00
CPCB01J23/745C10G2/332B01J35/61
Inventor 杨霞珍张睢宁霍超
Owner ZHEJIANG UNIV OF TECH
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