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High-dispersion dehydrogenation catalyst, and preparation method and use method of same

A dehydrogenation catalyst, highly dispersed technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. It can achieve the effect of high stability, high dispersion, high activity and stability

Active Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of low binding force between the active component and the carrier and poor dispersion in the existing preparation method. During the dehydrogenation reaction of hydrogen storage materials, it has the advantages of high dispersion of Pt, no acidity of the carrier, basically no coking in the reaction process, high activity and high stability

Method used

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  • High-dispersion dehydrogenation catalyst, and preparation method and use method of same
  • High-dispersion dehydrogenation catalyst, and preparation method and use method of same
  • High-dispersion dehydrogenation catalyst, and preparation method and use method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 2 g of graphene oxide, add it into 50 ml of ethylene glycol solution, and ultrasonicate for 240 min to obtain a dispersed graphene oxide solvent.

[0036] Take 0.622mL of a mixed solution of 16.14mL / L chloroplatinic acid and 8.03ml / L indium chloride, add 1.378mL of water to prepare a solution, add it to the graphene oxide solvent, stir it magnetically for 3 hours, then add 2ml of 0.2mol / L Sodium hydroxide / ethylene glycol solution, dried by microwave for 120min, then filtered, washed with ethanol several times, finally dried at 120°C for 4h, and put into a muffle furnace with He atmosphere at 350°C for 4h, Get a catalyst.

[0037] The obtained catalytic material is pressed and ground, and the selected particle size is 20-40 mesh, and 0.1 g is evaluated in an isothermal fixed-bed differential reactor. Before the evaluation, it is reduced with hydrogen. The reduction conditions are as follows: normal pressure, temperature 350 ℃, the hydrogen flow rate is 20mL / min, t...

Embodiment 2

[0040] Weigh 2 g of graphene oxide, add it into 50 ml of ethylene glycol solution, and ultrasonicate for 240 min to obtain a dispersed graphene oxide solvent.

[0041] Take 0.124mL of a mixed solution of 3.228mL / L chloroplatinic acid and 8.03ml / L indium chloride, add 1.378mL of water to make a solution, add it to the graphene oxide solvent, stir it magnetically for 3h, then add 2ml of 0.2mol / L Sodium hydroxide / ethylene glycol solution, dried by microwave for 120min, then filtered, washed with ethanol several times, finally dried at 120°C for 4h, and put into a muffle furnace with He atmosphere at 350°C for 4h, Get a catalyst.

[0042] The obtained catalytic material is pressed and ground, and the selected particle size is 20-40 mesh, and 0.1 g is evaluated in an isothermal fixed-bed differential reactor. Before the evaluation, it is reduced with hydrogen. The reduction conditions are as follows: normal pressure, temperature 350 ℃, the hydrogen flow rate is 20mL / min, the reduc...

Embodiment 3

[0044] Weigh 2 g of graphene oxide, add it into 50 ml of ethylene glycol solution, and ultrasonicate for 240 min to obtain a dispersed graphene oxide solvent.

[0045] Take 1.244mL of chloroplatinic acid with a concentration of 32.28mL / L and 8.03ml / L indium chloride mixed solution, add 1.378mL of water to make a solution, add it into the graphene oxide solvent, stir magnetically for 3h, then add 2ml of 0.2mol / L Sodium hydroxide / ethylene glycol solution, dried by microwave for 120min, then filtered, washed with ethanol several times, finally dried at 120°C for 4h, and put into a muffle furnace with He atmosphere at 350°C for 4h, Get a catalyst.

[0046] The obtained catalytic material is pressed and ground, and the selected particle size is 20-40 mesh, and 0.1 g is evaluated in an isothermal fixed-bed differential reactor. Before the evaluation, it is reduced with hydrogen. The reduction conditions are as follows: normal pressure, temperature 350 ℃, the hydrogen flow rate is 2...

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Abstract

The invention discloses a high-dispersion dehydrogenation catalyst, and a preparation method and a use method of same. The catalyst is composed of: (a) 0.1 to 5 parts of an active component, (b) 0.1 to 2 parts of at least one metal element, selected from subgroup elements, or a metal oxide thereof, and (c) 95 to 99.9 parts of graphene. The preparation method includes: dispersing graphene in an organic solvent, introducing metal salt of the active component, stirring the mixture, adding a certain amount of a reducing agent, performing microwave treatment to obtain an insoluble product, and filtering, washing and drying the insoluble product to obtain the high-dispersion dehydrogenation catalyst, which has high metal dispersibility, is small in size, and is free of acidity of the carrier. The catalyst, when being used for low-carbon alkane dehydrogenation or dehydrogenation reactions of organic liquid hydrogen storage materials, is high in activity and stability.

Description

technical field [0001] The invention discloses a high-dispersion dehydrogenation catalyst, which can be used for dehydrogenation of low-carbon alkanes, dehydrogenation of organic liquid hydrogen storage materials and other dehydrogenation reactions. Background technique [0002] Graphene is the thinnest known material and is extremely strong and rigid. Perfect graphene has an ideal two-dimensional crystal structure consisting of a hexagonal lattice in which each carbon atom is connected to three other carbon atoms by delta bonds. Compared with other carbon materials, graphene has excellent electron transport ability, large specific surface area, and low preparation cost, making it an ideal template to support nanocatalysts. [0003] So far, scientists have done a lot of work on graphene-based catalysts, and found that the catalytic performance of graphene-based catalysts is higher than that of catalysts based on other carbon materials. [0004] CN103007963A discloses a met...

Claims

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Application Information

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IPC IPC(8): B01J23/36B01J23/58B01J23/62C01B3/00C07C5/333C07C5/367C07C11/06C07C11/09C07C15/06C07C15/04C07C15/24C07C11/04
CPCY02P20/52
Inventor 童凤丫孙清缪长喜王仰东
Owner CHINA PETROLEUM & CHEM CORP
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