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Highly dispersed dehydrogenation catalyst, preparation method and use method

A dehydrogenation catalyst, highly dispersed technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of poor dispersion and the combination of active components and carriers Small strength and other issues

Active Publication Date: 2022-07-12
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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  • Highly dispersed dehydrogenation catalyst, preparation method and use method
  • Highly dispersed dehydrogenation catalyst, preparation method and use method
  • Highly dispersed dehydrogenation catalyst, preparation method and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 2 g of graphene oxide was weighed, added to 50 ml of ethylene glycol solution, and sonicated for 240 min to obtain a dispersed graphene oxide solvent.

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

[0037] The obtained catalytic material was pressed and ground, and the particle size was 20-40 mesh, and 0.1 g was evaluated in an isothermal fixed-bed differential reactor. Before the evaluation, hydrogen was used for reduction. The reduction conditions were as follows: pressure and normal pressure, and temperature o...

Embodiment 2

[0040] 2 g of graphene oxide was weighed, added to 50 ml of ethylene glycol solution, and sonicated for 240 min to obtain a dispersed graphene oxide solvent.

[0041] Take 0.124mL of a mixed solution of chloroplatinic acid with a concentration of 3.228mL / L and 8.03mL / L of indium chloride, add 1.378mL of water to prepare a solution, add it to the graphene oxide solvent, stir magnetically for 3h, and then add 2mL of 0.2mol / L In the sodium hydroxide / ethylene glycol solution, microwave drying for 120 min, then filtered, washed with ethanol for several times, and finally dried at 120 °C for 4 h, and placed in a muffle furnace under He atmosphere for 4 h at 350 °C. get the catalyst.

[0042] The obtained catalytic material was pressed and ground, and the particle size was 20-40 mesh, and 0.1 g was evaluated in an isothermal fixed-bed differential reactor. Before the evaluation, hydrogen was used for reduction. The reduction conditions were as follows: pressure and normal pressure, a...

Embodiment 3

[0044] 2 g of graphene oxide was weighed, added to 50 ml of ethylene glycol solution, and sonicated for 240 min to obtain a dispersed graphene oxide solvent.

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

[0046] The obtained catalytic material was pressed and ground, and the particle size was 20-40 mesh, and 0.1 g was evaluated in an isothermal fixed-bed differential reactor. Before the evaluation, hydrogen was used for reduction. The reduction conditions were as follows: pressure and normal pr...

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Abstract

The invention discloses a highly dispersed dehydrogenation catalyst, a preparation method and a method of use, comprising the following contents: the highly dispersed dehydrogenation catalyst is composed of (a) 0.1-5 parts of active components, (b) 0.1-2 parts of selected from subgroups At least one metal element or a metal oxide thereof in the element, (c) 95 to 99.9 parts of graphene materials are composed; the catalyst preparation method is as follows: the graphene is dispersed in an organic solvent, the metal salt of the active component is introduced, stirred and mixed. A certain amount of reducing agent is added, followed by microwave treatment, and the obtained insoluble matter is filtered, washed and dried to obtain a highly dispersed dehydrogenation catalyst. The catalyst has high metal dispersion, small size, and no acidity of the carrier, and has high activity and high stability when used in the dehydrogenation of low-carbon alkanes or the dehydrogenation of organic liquid hydrogen storage materials.

Description

technical field [0001] The invention discloses a highly dispersed 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, which consists 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 superior electron transport ability and large specific surface area, as well as low preparation cost, making it an ideal template to support nanocatalysts. [0003] So far, scientists have done a lot of work on graphene-supported catalysts, and found that the catalytic performance of graphene as a support is higher than that of other carbon materials as a support. [0004] CN103007963A discl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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