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Preparation method for support-type tubular palladium membrane or palladium alloy membrane

A palladium alloy membrane and supporting technology, which is applied in the field of hydrogen purification, can solve the problems of long production cycle, low adhesion, and high technical difficulty, and achieve the effect of overcoming poor adhesion, poor mechanical strength, and simple preparation process

Inactive Publication Date: 2015-12-09
中国船舶重工集团公司第七一二研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problem of low adhesion caused by the traditional method of preparing palladium membrane tubes, but there are many solder joints in diffusion welding, the implementation process is complicated, the technology is difficult, the support body cannot be recycled, the preparation cycle is long and the yield is low

Method used

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  • Preparation method for support-type tubular palladium membrane or palladium alloy membrane
  • Preparation method for support-type tubular palladium membrane or palladium alloy membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1 Be the basic embodiment of the preparation method of a kind of support type tubular palladium film of the present invention, palladium alloy film, its step is as follows:

[0029] A. Select a porous tubular support 1, and then tightly cover the surface of the tubular support 1 with a palladium film or palladium alloy film 2, leaving an overlap of 1 to 3 mm as the bonding layer 3. The excess part is cropped and removed;

[0030] B, bonding the bonding layer 3 with an inorganic adhesive, so that the palladium film or the palladium alloy film 2 forms a complete cylindrical support-type tubular palladium film or palladium alloy film tube;

[0031] C. Place the supported tubular palladium membrane or palladium alloy membrane tube in step B in an oven, then gradually raise the temperature in the oven from room temperature to 80-150°C, keep warm for 2-5 hours, and then cool down to room temperature naturally to make the adhesive The agent is fully cured and has hi...

Embodiment 2

[0032] Example 2 : For further embodiment: the preparation method of described support type tubular palladium membrane, palladium alloy membrane, its tubular support body 1 is that the tube wall is porous stainless steel thin wall tube, or the sieve of multi-mesh hole is made screen tube. The palladium film or palladium alloy film 2 is a palladium film or palladium alloy film prepared by melt casting and cold rolling. The outer diameter of the stainless steel thin-walled pipe or screen pipe is 2-20mm, the thickness of the pipe wall is 0.5-5mm, and the pipe length is 50-800mm. If the pipe length is too short or too long, it is not conducive to construction; The average diameter is 5-100um. The thickness of the palladium film or palladium alloy film 2 is 10-100um. The palladium membrane is a pure palladium membrane. In the step B, the inorganic adhesive is a one-component inorganic adhesive with high temperature resistance, selected from one-component silicate or phosphate ...

Embodiment 3

[0033] Example 3 : For further embodiment: the preparation method of described supported tubular palladium film, palladium alloy film, described palladium alloy film is palladium-silver alloy film, or palladium-copper alloy film, or palladium-gold alloy film , or palladium-yttrium alloy film.

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Abstract

The invention relates to a preparation method for a support-type tubular palladium membrane or palladium alloy membrane. The preparation method comprises the steps that 1, a tubular support body with multiple holes is selected, and the surface of the tubular support body is coated with the palladium membrane or palladium alloy membrane; 2, an adhesive layer is bonded with an inorganic adhesive to enable the palladium membrane or palladium alloy membrane to form a cylindrical support-type tubular palladium membrane or palladium alloy membrane tube; the support-type tubular palladium membrane or palladium alloy membrane tube in the second step is placed in a drying oven, the temperature is increased gradually, then heat preservation is performed, and finally the tube is naturally cooled to room temperature to enable the adhesive to be fully cured. The preparation method has the advantages that not only are the defects that a traditional support-free-type palladium membrane is poor in mechanical strength and low in hydrogen penetrating speed overcome, but also the defect that the adhesive force between a support-type tubular palladium membrane or palladium alloy membrane prepared through a traditional method and the support body is poor, so that the palladium membrane or palladium alloy membrane is prone to falling off is overcome; the preparation technology is simple, implementation is convenient, time consumption is little, the manufacturing cost is low, and the support body can be recycled and reused.

Description

technical field [0001] The invention belongs to the technical field of hydrogen purification, and relates to a preparation method of a palladium membrane and a palladium alloy membrane, in particular to a preparation method of a supported tubular palladium membrane and a palladium alloy membrane. Background technique [0002] In recent years, with the rapid development of hydrogen-oxygen fuel cell, steel, semiconductor, microelectronics, petrochemical and other industries, the demand for high-purity hydrogen has increased rapidly, which has strongly promoted people's research on high-purity hydrogen production and separation technology. Based on their own material properties, palladium and its alloy membranes have a series of advantages such as excellent hydrogen permeation selectivity, good mechanical and thermal stability, and have been extensively studied. [0003] At present, palladium membrane purification technology has been widely used in the preparation of pure hydro...

Claims

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Application Information

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IPC IPC(8): B01D69/04B01D69/10B01D71/02B01D67/00
Inventor 吴飞范晶周晶晶管道安袁斌
Owner 中国船舶重工集团公司第七一二研究所
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