Method for preparing multi-channel type hydrogen permeation palladium-based composite membrane

A multi-channel, composite membrane technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of difficult coating, toxic hydrazine vapor emission, high temperature, etc., to achieve uniform growth, reduce Emission, easy operation effect

Active Publication Date: 2008-05-28
RISON HI TECH MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology provides an improved way for depositing catalysts on porous materials without harming them or causing environmental concerns during manufacturing processes. It allows for precise control over how much material needs to react with each other while minimizing any unwanted side reactions that may occur between different chemical substances used together. By doing this, it simplifies production process management and improves product quality.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the performance and efficiency of various applications involving selective diffusion of certain gases over specific areas within a small device's interior cavity. These include separations between different components like noble metals and nonmetal oxides, including platins, nickel layers, tantalum layers, and niobons. Existing processes involve multiple step procedures and require expensive apparatus.

Method used

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  • Method for preparing multi-channel type hydrogen permeation palladium-based composite membrane
  • Method for preparing multi-channel type hydrogen permeation palladium-based composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1). The selected porous ceramic carrier has an average pore diameter of 0.2 μm, 19 channels, an outer diameter of 30 mm, and a length of 5 cm. The channels are circular and the channel diameter is 4 mm.

[0034] (2). Wash the multi-channel ceramic carrier with a commercially available detergent solution, and then rinse with water.

[0035] (3). Using conventional SnCl 2 / PdCl 2 The inner surface of the channel is activated by the method, in which the sensitizing solution contains SnCl 2 2H 2 O5g / L, concentrated hydrochloric acid 1ml / L; activation solution contains PdCl 2 0.2g / L, concentrated hydrochloric acid 1ml / L. Wrap the outer surface of the carrier with polytetrafluoroethylene tape, first dip in the sensitizing solution and rinse with water, then dip in the activation solution and rinse with water. Sensitization——After 5 times of activation treatment, disassemble the PTFE tape and soak it in water for 1 hour.

[0036] (4). As shown in Figure 2, the electrol...

Embodiment 2

[0040] Operation mode is the same as embodiment one, but the length of the porous ceramic carrier selected is 11cm, and the composition of plating solution is: Pd(C 2 h 3 o 2 ) 2 3g / L, concentrated ammonia water 150ml / L, K 2 EDTA 50g / L. The total amount of plating solution used is 530ml, and the thickness of the palladium film produced is about 5 μm.

Embodiment 3

[0042] Same as Example 1, but the length of the porous ceramic carrier selected is 50 cm, the electroless plating reaction temperature is 35 ° C, and the reducing agent is 0.2 mol / L N 2 h 4 solution, the gas flow rate is 70ml / min, the adding rate of reducing agent is 0.1ml / min, the bubbling gas at the bottom is argon, the total usage of plating solution is 3000ml, and the palladium film thickness is about 6.2μm.

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Abstract

The invention relates to an efficient hydrogen permeation membrane used for hydrogen separation and purification-a chemical plating preparation method of multi-channel-typed palladium composite membrane. Wrapping the lateral of a vector with plastic or rubber material; then arranging bath in the channel of the vector; adding reducing agent into the bath; and stirring the bath with the method of gas bubbling. The invention has simple operation, effectively realizes the even growing of the membrane layers and ensures the compactness and adhesion of the palladium membrane. Coating can be conducted at room temperature, which reduces the exhaust of poisonous gas.

Description

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Claims

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Application Information

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Owner RISON HI TECH MATERIALS CO LTD
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