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Hydrogen production catalyst based on 3D printing dealloying process, preparation method and application

A 3D printing and dealloying technology, applied in metal/metal oxide/metal hydroxide catalysts, process efficiency improvement, chemical instruments and methods, etc. quality limitation and other problems, to achieve the effects of high methanol conversion efficiency, reduced carbon monoxide concentration, and reduced internal diffusion resistance

Pending Publication Date: 2022-03-18
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of the problems of large pressure drop and poor mass and heat transfer caused by the filling of the existing granular methanol reforming hydrogen production catalysts, the radial mass transfer of the microchannel coated catalyst is limited, and the coating amount of the catalyst is small and Easy to fall off and other problems, the present invention aims to propose a hydrogen production catalyst, preparation method and application based on 3D printing dealloying process to solve the above problems

Method used

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  • Hydrogen production catalyst based on 3D printing dealloying process, preparation method and application
  • Hydrogen production catalyst based on 3D printing dealloying process, preparation method and application
  • Hydrogen production catalyst based on 3D printing dealloying process, preparation method and application

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Effect test

Embodiment 1

[0041] Zn-70% Cu-29.5% Fe-0.5% (mass ratio) 3D printing de-alloy structure catalyst:

[0042] Preparing the raw material mass percentage component is divided into 70% zinc, 29.5% copper, 0.5% iron, and the alloy raw material is vacuum suspended melting, and the 3D printing spherical pre-gold powder is prepared with an aerosolization technique. The particle diameter is from 15-53 microns powder. The porous structure is designed to be a body-hearted cube array structure with a size of 8 × 8 mm, a unit size of 4 mm, a porosity of 60%. 3D printing, selective laser melting parameters: laser power is 400W, scanning speed is 800mms -1 The thickness of the paving is 0.05mm, the print result is like figure 2 Indicated. After printing, the porous structure skeleton is annealing, the annealing temperature is 400 degrees Celsius, when the annealing time is 1, the structure is stabilized, and the porous structure 70Zn29.5Cu0.5Fe skeleton is placed in 15% HCl to carry out the chemical deprive, ...

Embodiment 2

[0046] Preparation of Zn-80% Cu-19.8% Si-0.2% (mass ratio) 3D printing deprofold structure:

[0047] Preparing the material mass percentage component is divided into 80% zinc, 19.8% copper, 0.2% silicon, and the alloy raw material is vacuum arc smelting the alloy material, and 3D printing spherical pre-gold powder is prepared with aerosolization technology. The particle diameter is 53 to 105 microns powder. The porous structure is designed to facade, the size is 8 × 8 mm, the unit size is 4mm, and the porosity is 70%. Then 3D printing, selective laser melting parameters: laser power is 300W, the scanning speed is 900mms -1 The paving thickness was 0.05 mm. After printing, the porous structure skeleton is annealing, the annealing temperature is 350 degrees Celsius, when the annealing time is 2, the structure is stabilized, and the porous structure 80Zn19.8cu0.2si skeleton is placed in 20% nitric acid to carry out the chemical deprinted gold, the degrease gold temperature is 40 degr...

Embodiment 3

[0051] Preparation of Al-50% Cu-40% Zn-10% (mass ratio) 3D printed deraint structure catalyst:

[0052] Preparing the weight of the raw material mass is 50% aluminum, 40% copper, 10% zinc, and the alloy material is vacuum inductively smelted to obtain alloy materials, and 3D printing spherical preparation is prepared with aerosolization technology. The particle diameter is from 15-53 microns powder. The porous structure is designed to be intimate cube array structure, with a size of 8 × 8 mm, a unit size of 4 mm, a porosity of 50%. 3D printing, selective laser melting parameters: laser power is 800W, the scan speed is 1000mms -1 The paving thickness was 0.05 mm. After printing, the porous structure skeleton is annealing, the annealing temperature is 600 degrees Celsius, when the annealing time is 2, the structure is stabilized to place the porous structure 50Al40Cu10Zn skeleton in 15% KOH to carry out a chemical deprive, the release gold temperature is 25 degrees Celsius, time For...

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Abstract

The invention discloses a hydrogen production structure catalyst based on a 3D printing dealloying process, a preparation method and application. The preparation method comprises the steps that (1) alloy raw materials are smelted, an alloy material is obtained, pre-alloy powder for 3D printing is prepared, and the pre-alloy powder is screened; (2) the pre-alloyed powder is subjected to 3D printing, and a macroscopic grid porous structure framework is prepared; (3) the 3D printing grid porous structure framework is subjected to annealing treatment; (4) the annealed 3D printing grid porous structure framework is placed in an alkaline or acid solution for chemical dealloying; (5) repeatedly cleaning the dealloyed 3D printing grid porous structure framework by using deionized water and absolute ethyl alcohol; and (6) reducing the 3D printing grid porous structure framework in a tubular furnace by using H2 to obtain the catalyst for hydrogen production by methanol reforming. The hydrogen production catalyst has the advantages of good mass and heat transfer, no need of coating, high conversion rate, good CO selectivity and large-scale production.

Description

Technical field [0001] The present invention belongs to the field of methanol reforming hydrogen, and is specifically involved in a hydrogen production catalyst, preparation method and application of a 3D printing agencies. Background technique [0002] In the case where the current energy supply tension and the atmospheric environment continue to deteriorate, it has become an inevitable trend. The proton exchange membrane fuel cell (PEMFC) has the advantages of high energy utilization, low pollution emissions and low operating temperatures, and is considered to be one of the most promising portable power sources. [0003] In recent years, proton exchange membrane fuel cell technology is applied to many fields such as automotive power, distributed power stations, portable electronic equipment, and residential energy. Currently, hydrogen is supplied to the car PEMFC mainly by three direct hydrogen storage modes, respectively, high pressure gas storage, low temperature liquid stora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/745B01J35/10C01B3/32B22F3/11B22F10/28B22F10/62B22F10/64B33Y10/00B33Y40/20B33Y70/00C22C18/02
CPCB01J23/80B01J23/745C01B3/326B22F3/11B22F10/28B22F10/64B22F10/62B33Y10/00B33Y40/20B33Y70/00C22C18/02C01B2203/0233C01B2203/1076C01B2203/1047B01J35/615Y02P10/25
Inventor 于新海李传东姚馨淇张汝行涂善东袁帅帅
Owner EAST CHINA UNIV OF SCI & TECH
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