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Multilayer selective hydrogen permeation composite membrane, and preparation method and application thereof

A composite membrane and selective technology, applied in the field of hydrogen permeation, can solve the problems of hydrogen permeability reduction and achieve the effect of prolonging the service life

Active Publication Date: 2021-06-15
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the high-temperature interdiffusion of palladium and niobium atoms leads to a serious reduction in hydrogen permeability, and to provide a multilayer selective hydrogen permeation composite membrane and its preparation and application

Method used

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  • Multilayer selective hydrogen permeation composite membrane, and preparation method and application thereof
  • Multilayer selective hydrogen permeation composite membrane, and preparation method and application thereof
  • Multilayer selective hydrogen permeation composite membrane, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Palladium film / single-layer graphene film / niobium film / single-layer graphene film / palladium film composite film, wherein the thickness of the niobium film is 0.3 mm, the thickness of the palladium film is 100 nm, and the thickness of the single-layer graphene film is 0.334 nm.

[0062] Use 500#, 1000#, 1500#, 2000# sandpaper to mechanically polish the surface of the 0.3mm thick nanocrystalline niobium film, and then use acetone and absolute ethanol for ultrasonic cleaning; then use hydrofluoric acid: concentrated sulfuric acid: lactic acid The mixed acid solution with a volume ratio of 1:3:6 is electrolytically polished, cleaned with deionized water, and dried with cold air for later use.

[0063] XPS was used to analyze the surface of niobium film after mechanical polishing and electrolytic polishing, the results are as follows figure 2 As shown, it was found that electrolytic polishing can effectively remove the oxide layer on the surface of the niobium film.

[006...

Embodiment 2

[0069] Palladium-ruthenium film / single-layer graphene film / niobium film / single-layer graphene film / palladium-ruthenium film composite film, wherein the thickness of the niobium film is 0.3 mm, the thickness of the palladium-ruthenium film is 50 nm, and the thickness of the single-layer graphene film is 0.334 nm.

[0070] Use 500#, 1000#, 1500#, 2000# sandpaper to mechanically polish the surface of the 0.3mm thick micro-crystalline niobium film, and then use acetone and absolute ethanol for ultrasonic cleaning; then use hydrofluoric acid: concentrated sulfuric acid: lactic acid The mixed acid solution with a volume ratio of 1:3:6 is electrolytically polished, cleaned with deionized water, and dried with cold air for later use.

[0071] Transfer the single-layer graphene film / polymethyl methacrylate film (Gr / PMMA) to deionized water, and then clamp the niobium film (Nb) with tweezers to cover the single-layer graphene film of Gr / PMMA on the surface The surface of the treated Nb ...

Embodiment 3

[0075] Palladium film / single-layer graphene film / niobium-titanium-nickel film / single-layer graphene film / palladium film composite film, wherein the thickness of niobium-titanium-nickel film is 0.3 mm, the thickness of palladium film is 100nm, and the thickness of single-layer graphene film is 0.334nm.

[0076] Use 500#, 1000#, 1500#, 2000# sandpaper to mechanically polish the surface of the niobium-titanium-nickel alloy film with a thickness of 0.3mm, and then use acetone and absolute ethanol for ultrasonic cleaning; then use hydrofluoric acid: concentrated sulfuric acid: The mixed acid solution with a volume ratio of lactic acid of 1:3:6 is used for electropolishing, cleaned with deionized water, and dried with cold air for later use.

[0077]The single-layer graphene film / polymethyl methacrylate film (Gr / PMMA) was transferred to deionized water, and then the niobium-titanium-nickel alloy film (Nb-Ti-Ni) was clamped with tweezers. The surface of the olefin film is evenly cov...

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Abstract

The invention provides a multilayer selective hydrogen permeation composite membrane, and belongs to the technical field of hydrogen permeation. The composite membrane comprises a metal base material layer with high hydrogen permeability, a metal layer with catalytic activity and permeability to hydrogen and a single-layer graphene film with selective permeability to proton hydrogen, wherein the metal base material layer is made of niobium or a metal alloy composed of niobium and other metal elements, and the metal layer is made of palladium or a metal alloy composed of palladium and other elements. The invention also provides a preparation method of the multilayer selective hydrogen permeation composite membrane. According to the multilayer selective hydrogen permeation composite membrane, high-temperature mutual diffusion of metal atoms in the metal layer and metal atoms in a metal substrate layer can be effectively prevented, meanwhile, the hydrogen permeation rate of the composite membrane is not affected, and the service life of the composite membrane can be prolonged. The multilayer selective hydrogen permeation composite membrane material is particularly suitable for separating hydrogen from a gas mixture through selective diffusion.

Description

technical field [0001] The invention relates to the technical field of hydrogen permeation, in particular to a multilayer selective hydrogen permeation composite membrane and its preparation and application. Background technique [0002] In the deuterium-tritium fuel cycle treatment process of the controllable thermonuclear fusion reactor and the hydrogen production, hydrogen storage and hydrogen-oxygen fuel cell process of advanced hydrogen energy utilization, it involves a large amount of hydrogen or its isotopes (deuterium, tritium) from its contained The operation of effectively separating and further purifying the mixed gas. Membrane separation technology, as a relatively new and rapidly developing technology, has the advantages of energy saving, environmental protection and low cost, and has been widely used in industry. Due to the advantages of high hydrogen selective separation, good mechanical strength, and easy molding, dense metal membranes are considered to be t...

Claims

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Application Information

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IPC IPC(8): B01D61/00B01D67/00B01D69/12B01D71/02C01B3/50B01D53/22
CPCB01D61/002B01D67/0039B01D69/12B01D71/021B01D71/022B01D53/228C01B3/503C01B3/505B01D2256/16Y02E60/50
Inventor 郭亚昆陈长安邹东利刘瑞东邓立李赣叶小球
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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