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A composite metal hydrogen separation membrane and its preparation method and application

A composite metal and separation membrane technology, which is applied in separation methods, hydrogen separation, semi-permeable membrane separation, etc., can solve the problems of weak bonding strength between porous stainless steel and metal membrane, and achieve good thermal cycle stability, long service life, and combination high intensity effect

Active Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects of intermetallic diffusion between the porous stainless steel and the metal film in the existing hydrogen separation membrane and the weak bonding strength between the porous stainless steel and the metal film, and provide a composite metal hydrogen separation membrane and its preparation method and the composite metal hydrogen separation membrane. Application of Metal Hydrogen Separation Membranes in Dehydrogenation Reactions

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  • A composite metal hydrogen separation membrane and its preparation method and application
  • A composite metal hydrogen separation membrane and its preparation method and application
  • A composite metal hydrogen separation membrane and its preparation method and application

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preparation example Construction

[0040] The present invention also provides a method for preparing a composite metal hydrogen separation membrane, the method comprising the following steps:

[0041] (1) immersing the porous stainless steel in a mixed solution containing a water-soluble zinc salt and hexamethylenetetramine to carry out the first hydrothermal reaction to obtain a porous stainless steel attached with zinc oxide;

[0042](2) The second hydrothermal reaction is carried out by immersing the porous stainless steel with zinc oxide attached obtained in step (1) in an aqueous solution of a water-soluble palladium salt.

[0043] In the present invention, preferably, in the mixed solution, the molar concentration of the water-soluble zinc salt is 0.01-0.2mol / L, and the molar concentration of the hexamethylenetetramine is 0.01-0.2mol / L L.

[0044] In the present invention, the weight of the mixed solution is not particularly limited, as long as the porous stainless steel can be submerged into the mixed s...

Embodiment 1

[0057] In the present invention, the porous stainless steel is a 316L porous stainless steel tube with an average pore diameter of 1 micron, a thickness of 0.5 mm, a porosity of 30%, and an outer diameter of 1 mm.

[0058] Pretreatment of the porous stainless steel tube: the porous stainless steel tube is cleaned with 5% sodium hydroxide solution and 40% dilute nitric acid solution successively, then washed to neutral with deionized water, finally cleaned with absolute ethanol and heated at 100 Dry at ℃.

[0059] Preparation of composite metal hydrogen separation membrane:

[0060] (1) The above-mentioned processed porous stainless steel tube is immersed in a mixed solution containing water-soluble zinc salt (zinc nitrate 0.1mol / L) and hexamethylenetetramine (0.1mol / L) to carry out the first hydrothermal reaction to obtain A porous stainless steel tube with zinc oxide attached, the conditions of the first hydrothermal reaction include: the reaction temperature is 95°C, and th...

Embodiment 2

[0063] In the present invention, the porous stainless steel is a 316L porous stainless steel tube with an average pore diameter of 1.2 microns, a thickness of 1 mm, a porosity of 40%, and an outer diameter of 4 mm.

[0064] Pretreatment of the porous stainless steel tube: the porous stainless steel tube is cleaned with 5% sodium hydroxide solution and 30% dilute nitric acid solution successively, then washed to neutral with deionized water, finally cleaned with absolute ethanol and heated at 120 Dry at ℃.

[0065] Preparation of composite metal hydrogen separation membrane:

[0066] (1) The above-mentioned processed porous stainless steel tube is immersed in a mixed solution containing water-soluble zinc salt (zinc nitrate 0.1mol / L) and hexamethylenetetramine (0.1mol / L) to carry out the first hydrothermal reaction to obtain A porous stainless steel tube with zinc oxide attached, the conditions of the first hydrothermal reaction include: the reaction temperature is 85°C, and t...

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Abstract

The invention discloses a composite metal hydrogen separation membrane, its preparation method and the application of the composite metal hydrogen separation membrane in dehydrogenation reaction. The separation membrane comprises a porous stainless steel layer and zinc oxide and palladium metal on the porous stainless steel layer composite film. The composite metal hydrogen separation membrane provided by the present invention can effectively separate hydrogen and improve the yield of the reaction product of the dehydrogenation reaction. At the same time, the combination between zinc oxide and palladium metal composite membrane and porous stainless steel is strong, effectively solving the problem of high temperature Sintering phenomenon of metallic palladium films. In addition, the preparation method of the composite metal hydrogen separation membrane provided by the present invention is simple and easy to operate, and is favorable for popularization and application.

Description

technical field [0001] The invention relates to a composite metal hydrogen separation membrane, a preparation method thereof and the application of the composite metal hydrogen separation membrane in dehydrogenation reaction. Background technique [0002] Gas membrane separation is a green technology. Due to its advantages of high separation efficiency, low energy consumption, and simple operation, it shows unique advantages in the competition with traditional separation technologies (adsorption, absorption, cryogenic separation, etc.). Research and applications are developing very rapidly. [0003] Inorganic membranes can be divided into dense membranes and porous membranes according to the surface structure. Dense membranes mainly include various metals and their alloy membranes (such as Pd and Pd alloy membranes), dense solid electrolyte membranes (such as composite solid oxide membranes), etc. Porous membranes mainly include porous metal membranes (such as Ti, Ag, Ni, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D71/02B01D53/22C01B3/50
Inventor 冯英杰姜健准张明森冯静
Owner CHINA PETROLEUM & CHEM CORP
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