Gear type hydrogen-permeable palladium or palladium alloy film and hydrogen separator

A palladium alloy membrane, gear-type technology, applied in the field of high-efficiency hydrogen permeable membrane, can solve the problems of high preparation difficulty, poor mechanical strength, expensive base material, etc.

Active Publication Date: 2011-07-13
RISON HI TECH MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the matrix material of the former is expensive, the mechanical strength is poor, and it is difficult to seal and install at high temperature; the multi-channel membrane uses multi-channel porous ceramics as the matrix material, and the membrane is located in a long and thin channel, so the preparation of the membrane is more difficult than ordinary tubular membranes.

Method used

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  • Gear type hydrogen-permeable palladium or palladium alloy film and hydrogen separator
  • Gear type hydrogen-permeable palladium or palladium alloy film and hydrogen separator
  • Gear type hydrogen-permeable palladium or palladium alloy film and hydrogen separator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The gear-shaped palladium membrane is prepared by electroless plating, and the membrane area of ​​the membrane is increased by 120% compared with the tubular membrane with the same outer diameter and length.

[0025] (1). The outer diameter of the gear-type porous ceramic substrate is 30 mm, the inner diameter is 15 mm, the number of teeth is 15, the height of the teeth is 5 mm, the length of the gear is 200 mm, and the length of the round tubes at both ends is 25 mm. After cleaning the substrate with commercially available dish soap, rinse with water.

[0026] (2). Using conventional SnCl 2 / PdCl 2 The activation method activates the surface of the gear-type substrate, wherein the sensitizing solution contains SnCl 2 5g / L, hydrochloric acid 1ml / L; activation solution contains PdCl 2 0.2g / L, hydrochloric acid 1ml / L. Plug the inner tube of the matrix with a silica gel plug, first dip it in the sensitizing solution and rinse it with water, then dip it in the activat...

Embodiment 2

[0031] The gear-shaped palladium-silver alloy membrane is prepared by electroless plating, and the membrane area of ​​the membrane is increased by 130% compared with the tubular membrane with the same outer diameter and length.

[0032] (1). Same as the steps (1), (2), (3), (4), (5) of Example 1, but select the gear-type porous ceramic substrate with an outer diameter of 20 mm, an inner diameter of 10 mm, a number of teeth of 15, and a tooth height 3mm, the length of the gear is 200mm, and the length of the round tube at both ends is 25mm; step (2) is changed to Pd(OH) 2 For the activation method, refer to the Chinese patent (an activation process of electroless plating on non-metallic substrates. ZL200710022996.6); step (4) is changed to a theoretically calculated palladium film thickness of 4 μm, and the electroless plating is stopped.

[0033] (2). Electroless silver plating on the surface of palladium film. The composition of the silver plating solution is: AgNO 3 5g / L,...

Embodiment 3

[0037] The gear-type palladium-copper alloy membrane is prepared by electroless plating and electroplating, and the membrane area of ​​the membrane is increased by 270% compared with the tubular membrane with the same outer diameter and length.

[0038] (1). Steps (1), (2), (3), (4), and (5) of Example 1, but select the gear type porous ceramic substrate with an outer diameter of 50 mm, an inner diameter of 25 mm, a number of teeth of 30, and a tooth height 8mm, gear length 200mm, and circular tube lengths at both ends of 30mm; step (4) was changed to a theoretically calculated palladium film thickness of 3 μm, and the electroless plating was stopped.

[0039] (2). Electroplating is used to plate copper on the surface of the palladium film, and the composition of the copper electroplating solution is CuSO 4 ·5H 2 O 150-200g / L, sulfuric acid 50-70g / L, chloride ion 20-80mg / L, polyethylene glycol 0.05-0.1g / L, ethylene thiourea 0.2-0.7mg / L. The current density is 2A / dm 2 , the ...

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Abstract

The invention relates to a hydrogen separating high-efficiency gear type hydrogen palladium or palladium alloy film and a hydrogen separator based on the film. A gear type porous ceramic is used as a substrate, and a palladium or palladium alloy film is formed on the substrate by a chemical plating or chemical plating and electroplating combined method; and in the hydrogen separator, the two ends of the film are sealed by graphite pads according to a clamping and sleeving method. The film can provide a larger film area, so that the hydrogen separator is more efficient and compact.

Description

Technical field: [0001] The invention relates to a high-efficiency hydrogen permeable membrane for hydrogen separation—gear type palladium or palladium alloy membrane, and a corresponding hydrogen separator. The membrane can make the hydrogen separator more compact and practical. Background technique: [0002] Metal palladium membranes (including palladium alloy membranes) have excellent permeability and selectivity to hydrogen. The way hydrogen passes through palladium membranes is the dissolution-diffusion mechanism [Huang Yan, Li Xue, Fan Yiqun, Xu Nanping. Hydrogen-permeable palladium composite membranes The principle, preparation and characterization. Chemical Progress, 2006, 18 (2-3): 230-238.], that is: hydrogen molecules first chemisorb on the palladium membrane surface and dissociate into hydrogen atoms, which dissolve into the palladium membrane and Under the action of pressure difference, hydrogen atoms diffuse to the other side of the membrane, and hydrogen atom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/10B01D53/22C01B3/50
Inventor 黄彦王红志俞健胡小娟
Owner RISON HI TECH MATERIALS CO LTD
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