A kind of 3D printing monolithic composite structure catalyst and its preparation method and application

A composite structure, 3D printing technology, applied in catalyst activation/preparation, carbon compound catalysts, catalysts, etc., can solve the problems of limited effective reaction area and reaction time, large temperature gradient of catalyst bed, and low strength of catalyst carrier, etc. Fast and stable preparation, cheap and easy to obtain, and material saving effect

Active Publication Date: 2021-02-19
HUANENG CLEAN ENERGY RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual production process, the traditional granular catalyst has some obvious disadvantages: low porosity, large pressure drop of the catalyst bed, large temperature gradient at each point of the catalyst bed, serious carbon deposition of the catalyst, etc.
CN104998645A discloses a method for preparing a methanation catalyst with cordierite honeycomb ceramics as a carrier. The active component precursor is impregnated on the surface of cordierite honeycomb ceramics, and then the required catalyst is obtained by microwave roasting. However, it is subject to the manufacturing process. And technical limitations, the through holes of the ceramic carrier are straight hole channels, which further limits the effective reaction area and reaction time
The strength of the catalyst carrier prepared by these two methods is not high, which is not conducive to high-pressure reaction, and the catalyst is relatively easy to fall off.

Method used

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  • A kind of 3D printing monolithic composite structure catalyst and its preparation method and application
  • A kind of 3D printing monolithic composite structure catalyst and its preparation method and application
  • A kind of 3D printing monolithic composite structure catalyst and its preparation method and application

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preparation example Construction

[0031] The preparation method of the 3D printing monolithic composite structure catalyst of the present invention comprises the following steps:

[0032] Step 1: Use 3D model design software to make a corresponding three-dimensional model with a channel structure, which can be in various forms such as porous, circular, honeycomb, and mesh, and convert the format of the 3D model into a binary format.

[0033] Step 2: Prepare the powder for metal 3D printing. The powder is divided into active component powder and carrier powder. The active component powder can be catalyzed by nickel, copper, cobalt, iron, titanium, vanadium, cerium, zirconium, etc. The active metal element, the carrier powder is silicon powder, and the particle size of the above powder is required to be less than 100 microns, so as to facilitate powder transportation.

[0034] Step 3: Design catalyst printing formula, adjust the ratio of active component metal powder and carrier powder to obtain catalysts with d...

Embodiment 1

[0044] Step 1: Use 3D model design software to make a corresponding three-dimensional model with a channel structure in the form of a dot matrix. The diameter of each point is 0.5 mm, the distance between points is 2 mm, and the points are connected The diameter of the wire is 0.5 mm, the three-dimensional structure is a matrix of 8×8×8, and the format of the 3D model is converted into a binary format.

[0045] Step 2: Prepare the powder for metal 3D printing. The powder is divided into active component powder and carrier powder. The active component powder is nickel metal element powder with catalytic activity, and the carrier powder is easy to be dissolved by lye. of silica fume. The particle size of the above-mentioned powder is required to be less than 100 microns in order to facilitate powder transportation.

[0046] Step 3: Select the ratio of nickel:silicon to be 1:2, this catalyst formula is especially suitable for methanation reaction.

[0047] Step 4: Program the b...

Embodiment 2

[0051] Step 1: Use 3D model design software to make a corresponding three-dimensional model with a channel structure. It adopts a circular honeycomb form. The diameter of the outer ring is 10 mm, and the diameter of the inner ring is 1.5 mm. Channels, 8 mm thick, and convert the format of the 3D model to binary format.

[0052] Step 2: Prepare the powder for metal 3D printing. The powder is divided into active component powder and carrier powder. The active component powder is nickel metal element powder with catalytic activity, and the carrier powder is easy to be dissolved by lye. of silica fume. The particle size of the above-mentioned powder is required to be less than 100 microns in order to facilitate powder transportation.

[0053] Step 3: Select the ratio of nickel:silicon to be 1:2, this catalyst formula is especially suitable for methanation reaction.

[0054] Step 4: Program the binary information, determine the structural outline in the programming software, plan...

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Abstract

The invention discloses a 3D printing monolithic composite structure catalyst as well as its preparation method and application, and belongs to the cross technical field of 3D printing and catalysts. The active component powder and carrier powder with catalytic activity are printed into a three-dimensional monolithic structure at one time, and then part of the carrier is removed by dissolving in an alkaline solution to activate the catalytic activity of the metal to obtain a monolithic composite structure catalyst. The preparation process of this method is simple, and complex structures can be customized according to the needs. The monolithic composite structure catalyst can be prepared quickly and stably, which saves materials and improves production speed. The structure is formed once, without assembly and secondary processing; The powder can be adjusted arbitrarily, with high flexibility; the activation method is simple, and it is convenient to use on site. The obtained monolithic composite structure catalyst has high structural precision, high strength and long life, and can be widely used in the fields of tail gas denitrification, synthesis gas methanation, polymer compound synthesis, oxidative dehydrogenation and hydrodesulfurization.

Description

technical field [0001] The invention belongs to the cross technical field of 3D printing and catalysts, and in particular relates to a 3D printing monolithic composite structure catalyst and its preparation method and application. Background technique [0002] Monolithic structure catalysts are mainly suitable for high-throughput and rapid reaction occasions, such as tail gas denitrification, synthesis gas methanation, polymer compound synthesis, oxidative dehydrogenation, hydrodesulfurization and other processes. Taking syngas methanation as an example, currently the most widely used methanation reactor is the fixed-bed reactor. The advantage of the fixed-bed reactor is that it is simple in design and operation, and has less wear and tear on the catalyst. However, in the actual production process, traditional granular catalysts have some obvious disadvantages: low porosity, large pressure drop in the catalyst bed, large temperature gradient at each point of the catalyst bed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/22B01J23/72B01J37/34C07C1/04C07C9/04C07C29/00C07C31/04B01D53/86B01D53/56
CPCB01D53/8628B01J23/22B01J23/72B01J23/755B01J37/34C07C1/0435C07C1/0445C07C29/00C07C2523/755C07C9/04C07C31/04Y02P20/52
Inventor 王晓龙郜时旺许世森刘练波王绍民
Owner HUANENG CLEAN ENERGY RES INST
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