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Assembled catalytic filler, preparation method thereof and application of assembled catalytic filler in flow chemical catalytic system

A technology of catalytic packing and body shape, which is applied in the field of catalysis, can solve the problems of easy aggregation of nanometer metals, degradation of catalytic performance, and decrease of effective surface area of ​​catalysts, and achieve the effects of strong catalytic activity, convenient separation and recovery, and excellent catalytic reaction efficiency

Pending Publication Date: 2022-07-05
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned catalytic fillers mainly use active metals to catalyze the reaction, but the introduced nano-metals are easy to agglomerate, which easily reduces the effective surface area of ​​the catalyst, resulting in a decrease in catalytic performance, and the use of metals, especially precious metals, faces environmental protection and cost. pressure

Method used

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  • Assembled catalytic filler, preparation method thereof and application of assembled catalytic filler in flow chemical catalytic system
  • Assembled catalytic filler, preparation method thereof and application of assembled catalytic filler in flow chemical catalytic system
  • Assembled catalytic filler, preparation method thereof and application of assembled catalytic filler in flow chemical catalytic system

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Effect test

Embodiment 1

[0037] An assembly type catalytic filler, graphene oxide, wetting agent, aluminum silicate fiber, H 2 O 2 , NH 3 ·H 2 The mass ratio of O is 1:0.8:3.75:0.08:12.53; the specific preparation method includes the following steps:

[0038] Take 46.37mL of graphene oxide dispersion with a concentration of 5.75mg / mL in a 100mL polytetrafluoroethylene reactor liner, add 1000mg of loose aluminum silicate fibers, 1mL of ethanol, and 7.2mL of 0.3wt% under stirring conditions. 14.0 mL of aqueous hydrogen peroxide solution and 14.0 mL of aqueous ammonia solution with a concentration of 28 wt%; after mixing uniformly, the inner tank was placed in a hydrothermal reaction kettle, and the hydrothermal reaction was carried out at 180 ° C for 8 h; after the reaction was completed, it was cooled to room temperature to obtain nitrogen-doped porous Graphene-aluminosilicate fibers (NHG-ASFs) assembly hydrogels.

[0039] The nitrogen-doped porous graphene-aluminosilicate fiber assembly hydrogel o...

Embodiment 2

[0063] An assembly type catalytic filler, graphene oxide, wetting agent, aluminum silicate fiber, H 2 O 2 , NH 3 ·H 2 The mass ratio of O is 1:1.2:1.87:0.08:12.53; the specific preparation method includes the following steps:

[0064] Take 46.37mL of graphene oxide dispersion with a concentration of 5.75mg / mL in a 100mL polytetrafluoroethylene reactor liner, add 500mg of loose aluminum silicate fibers under stirring conditions, 1.5mL of acetone, 7.2mL of concentration is 0.3 wt% hydrogen peroxide solution and 14.0 mL ammonia solution with a concentration of 28wt%; after mixing uniformly, the inner tank was put into the hydrothermal reaction kettle, and the hydrothermal reaction was carried out at 180 ° C for 8h; after the reaction was completed, it was cooled to room temperature to obtain nitrogen-doped Heteroporous graphene-aluminosilicate fiber assembly hydrogels. The composite material can be used as a fixed bed catalyst with a flow rate of 13.3 ml / min and a conversion ...

Embodiment 3

[0066] An assembly type catalytic filler, graphene oxide, wetting agent, aluminum silicate fiber, H 2 O 2 , NH 3 ·H 2 The mass ratio of O is 1:0.8:2.8:0.08:12.53; the specific preparation method includes the following steps:

[0067] Take 46.37mL of graphene oxide dispersion liquid with a concentration of 5.75mg / mL in a 100mL polytetrafluoroethylene reactor liner, add 750mg of loose aluminum silicate fibers under stirring conditions, 1mL of ethanol, 7.2mL of concentration is 0.3wt % hydrogen peroxide solution and 14.0 mL of ammonia solution with a concentration of 28 wt%; after mixing uniformly, the inner tank was placed in a hydrothermal reaction kettle, and the hydrothermal reaction was carried out at 180 ° C for 8 h; after the reaction was completed, it was cooled to room temperature to obtain nitrogen doped Porous graphene-aluminosilicate fiber assembly hydrogel. The composite material can be used as a fixed bed catalyst.

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Abstract

Graphene oxide and a fiber material are used as main assembly raw materials, a water-soluble small molecular organic matter is used as a wetting agent, ammonia water is used as a nitrogen source, hydrogen peroxide is used as a pore forming agent, and a composite hydrogel assembly catalyst with a multi-stage porous structure is prepared through a one-step hydrothermal method. The assembled catalytic filler obtained by the invention does not need to use traditional modification means such as introduction of active metal, can show excellent catalytic reaction efficiency, has good mechanical properties and cycling stability, and can provide a new idea for preparation of a high-performance flow chemical system catalyst; the preparation method is simple, raw materials are easy to obtain, equipment requirements are low, conditions are mild, production cost is low, and the preparation method is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to an assembly-type catalytic filler, a preparation method thereof, and an application in a flow chemical catalytic system. Background technique [0002] Flow chemistry systems (eg, fixed-bed catalysis) are flow catalysis for continuous reactions by fixing the catalyst in a specific flow position and allowing the reaction mixture to continuously flow through the catalyst. The flow chemical catalytic system constructed with packed catalyst has the advantages of easy product separation and simple operation, and is an ideal industrial production system. As the core of flow chemistry catalytic systems, the activity of catalytic fillers is closely related to the number of exposed active sites, micro- and nanostructures, and the synergy between components. However, conventional granular catalysts are not easy to expose active sites due to their compact packing state, and sm...

Claims

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Application Information

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IPC IPC(8): B01J21/12B01J21/18B01J27/24B01J35/06B01J35/10B01J37/10C07C209/36C07C211/51C07C211/52C07C213/02C07C215/76C07C217/84B01J8/06
CPCB01J27/24B01J37/10B01J21/18B01J21/12B01J8/06C07C213/02C07C209/325B01J35/58B01J35/60C07C215/76C07C211/52C07C211/51C07C217/84
Inventor 奚江波胡晗宇
Owner WUHAN INSTITUTE OF TECHNOLOGY
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