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Preparation method of unsymmetrical composite ceramic hydrogen permeation membrane

A technology of composite ceramics and hydrogen permeable membrane, which is applied in the field of environmental protection materials, can solve the problems of low hydrogen permeable membrane, poor chemical stability and compatibility, etc., to increase hydrogen permeation, good catalytic activity, improve poor stability and The effect of hydrogen permeability

Inactive Publication Date: 2019-01-04
FOSHAN WANHE NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing an asymmetric composite ceramic hydrogen permeable membrane for the existing ceramic hydrogen permeable membrane with relatively low hydrogen permeable capacity and relatively poor compatibility in terms of chemical stability and the like.

Method used

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  • Preparation method of unsymmetrical composite ceramic hydrogen permeation membrane

Examples

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example 1

[0025] According to the molecular formula Nd 5.5 W 0.5 Mo 0.5 o 11.25-δ (0.05<δ<0.5) Take the oxides of each element and put them into a ball mill for ball milling until the particle size of the powder is 100nm to obtain a mixed powder. Put the mixed powder in a muffle furnace at 800°C Calcined for 10 hours, cooled to room temperature to obtain precursor powder, took 40g nickel nitrate, 50g precursor powder, added to 150mL deionized water, stirred at 300r / min for 20min, then added 15g citric acid, 50g mass fraction was 10% ammonia water, continued After stirring for 1 hour, heat it in a muffle furnace until it spontaneously ignites, cool it to room temperature, transfer it to a grinder, and grind it through a 300-mesh sieve to obtain a composite powder. Take 50g of the composite powder, 30g of N-methylpyrrolidone, 6g of polyethersulfone, and 1g Put polyvinylpyrrolidone into a ball mill, and ball mill it at 300r / min for 8h to obtain a slurry. Take 0.1mol of lanthanum nitrate...

example 2

[0027] According to the molecular formula Nd 5.5 W 0.5 Mo 0.5 o 11.25-δThe amount of elements in (0.05<δ<0.5) Take the oxides of each element and put them into a ball mill for ball milling until the particle size of the powder is 550nm to obtain a mixed powder. Put the mixed powder in a muffle furnace at 850°C Calcined for 11 hours, cooled to room temperature to obtain precursor powder, took 45g nickel nitrate, 55g precursor powder, added 175mL deionized water, stirred at 350r / min for 25min, then added 22g citric acid, 65g mass fraction was 10% ammonia water, continued After stirring for 1.5 hours, place it in a muffle furnace and heat it to spontaneous combustion. After cooling to room temperature, transfer it to a grinder for grinding, and pass through a 300-mesh sieve to obtain a composite powder. Take 55g of the composite powder, 35g of N-methylpyrrolidone, and 7g of polyethersulfone. Put 1.5g of polyvinylpyrrolidone into a ball mill, and ball mill at 330r / min for 9h to...

example 3

[0029] According to the molecular formula Nd 5.5 W 0.5 Mo 0.5 o 11.25-δ The amount of elements in (0.05<δ<0.5) Take the oxides of each element and put them into a ball mill for ball milling until the particle size of the powder is 1000nm to obtain a mixed powder. Put the mixed powder in a muffle furnace at 900°C Calcined for 12 hours, cooled to room temperature to obtain precursor powder, took 50g nickel nitrate, 60g precursor powder, added to 200mL deionized water, stirred at 400r / min for 30min, then added 30g citric acid, 80g mass fraction was 10% ammonia water, continued After stirring for 2 hours, place it in a muffle furnace and heat it to spontaneous combustion. After cooling to room temperature, transfer it to a grinder for grinding, and pass through a 300-mesh sieve to obtain a composite powder. Take 60g of the composite powder, 40g of N-methylpyrrolidone, 8g of polyethersulfone, and 2g Put polyvinylpyrrolidone into a ball mill, and ball mill it at 360r / min for 10h ...

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Abstract

The invention relates to a preparation method of an unsymmetrical composite ceramic hydrogen permeation membrane, and belongs to the technical field of environment-friendly materials. According to themethod, a tungsten acid rare earth compound with good chemical stability is selected as a membrane material, electronic conductive phase metal Ni is led into the membrane, nickel in an ion form is led into the tungsten acid rare earth compound by a citric acid-nitrate combustion method, simple-substance Ni is reduced, an electron conduction channel is formed, the bulk phase diffusion rate of themembrane is increased, hydrogen permeation amount of a diaphragm is increased, two phases of the a prepared two-phase membrane are more uniformly mixed, and the membrane has higher hydrogen permeationamount and chemical stability. According to the method, rare earth nano-particles with high catalytic activity are deposited on the inner wall of a green diaphragm of the hydrogen permeation membraneand serve as supporting frameworks, the rare earth nano-particles and conductive-phase metal Ni form continuous conductive grids, electrochemical reaction active sites are increased, the hydrogen permeation membrane has good catalytic activity, and poor stability and hydrogen permeation rate of the hydrogen permeation membrane are effectively improved.

Description

technical field [0001] The invention relates to a preparation method of an asymmetric composite ceramic hydrogen permeable membrane, which belongs to the technical field of environmental protection materials. Background technique [0002] As an important chemical raw material, hydrogen has been in increasing demand in electronics, chemical industry and energy in recent years. In particular, hydrogen, as an efficient and clean new energy source, has a growing demand. How to efficiently separate and purify hydrogen has become a key technology. Ceramic hydrogen permeable membrane has completely selective hydrogen permeable performance and low price. It has broad prospects in the application of hydrogen separation and membrane reaction, and has been paid more and more attention by people. However, how to prepare ceramic hydrogen permeable membranes with high permeability and high stability has become one of the important factors restricting its development. [0003] For the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
CPCC04B35/495C04B35/62218C04B2235/3227C04B2235/3256C04B2235/3258C04B2235/405
Inventor 裘友玖张桂芳史志新
Owner FOSHAN WANHE NEW ENERGY TECH CO LTD
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