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Palladium or palladium alloy membrane based on wall-flow honeycomb ceramic and preparation method and application thereof

A technology of honeycomb ceramics and palladium alloy membranes, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve problems such as small channel diameter, peeling of palladium membranes, and inability to meet the working requirements of palladium composite membranes, and achieve large membranes Area, the effect of increasing hydrogen production

Inactive Publication Date: 2013-06-19
南京髙谦功能材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, commercialized WFHC has small and many channel diameters, and palladium membranes in such channels are prone to defects or peeling; on the other hand, WFHC uses dead-end filtration, and palladium membranes need to be used for purifying hydrogen. Remove the impurity gas in time, but the existing WFHC cannot meet the requirements of the palladium composite membrane, and its channel needs to be designed

Method used

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  • Palladium or palladium alloy membrane based on wall-flow honeycomb ceramic and preparation method and application thereof
  • Palladium or palladium alloy membrane based on wall-flow honeycomb ceramic and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] (1). The wall-flow honeycomb ceramic with square channels was selected as the substrate of the palladium composite membrane. The outer diameter of the substrate was 150 mm, the length was 152.4 mm, and the average pore diameter of the substrate was 3 μm. After cleaning the substrate with commercially available dish soap, rinse with water.

[0032] (2). Use the conventional sol-gel method to modify the inner surface of the matrix pores. The sol composition is 0.5 mol / L Boehmite sol, 5% PVA (polyvinyl alcohol) solution and PEG 400 (polyethylene glycol 400) solution.

[0033] (3). Using conventional SnCl 2 / PdCl 2 The activation method activates the inner surface of the air inlet channel of the wall-flow honeycomb ceramic matrix, in which the sensitization liquid contains SnCl 2 5 g / L, hydrochloric acid 1 ml / L; activation solution contains PdCl 2 0.2 g / L, hydrochloric acid 1 ml / L. First dip in the sensitizing solution and rinse with water, then dip in the activation s...

Embodiment 2

[0038] (1). The wall-flow honeycomb ceramic with circular channels is selected as the substrate of the palladium composite membrane, such as figure 2 As shown, the outer diameter of the substrate is 90 mm, the length is 150 mm, and the average pore diameter of the substrate is 0.2 μm. After cleaning the substrate with commercially available dish soap, rinse with water.

[0039] (2). Using conventional SnCl 2 / PdCl 2 The activation method activates the inner surface of the air intake channel of the wall-flow honeycomb ceramics, in which the sensitizing liquid contains SnCl 2 5 g / L, hydrochloric acid 1 ml / L; activation solution contains PdCl 2 0.2 g / L, hydrochloric acid 1 ml / L. First dip in the sensitizing solution and rinse with water, then dip in the activation solution, and finally dip in dilute hydrochloric acid. Repeat this operation 5 times.

[0040] (3). Put the activated substrate into the plating solution to start electroless plating. The composition of the pla...

Embodiment 3

[0045] (1). The wall-flow honeycomb ceramic with circular channels is selected as the substrate of the palladium composite membrane. The outer diameter of the substrate is 90 mm, the length is 150 mm, and the average pore diameter of the substrate is 3 μm. After cleaning the substrate with commercially available dish soap, rinse with water.

[0046] (2). Use the conventional sol-gel method to modify the inner surface of the matrix pores. The sol composition is 0.5 mol / L Boehmite sol, 5% PVA (polyvinyl alcohol) solution and PEG 400 (polyethylene glycol 400) solution.

[0047] (3). Using conventional SnCl 2 / PdCl 2 The activation method activates the inner surface of the air inlet channel of the wall-flow honeycomb ceramic matrix, in which the sensitization liquid contains SnCl 2 5 g / L, hydrochloric acid 1 ml / L; activation solution contains PdCl 2 0.2 g / L, hydrochloric acid 1 ml / L. First dip in the sensitizing solution and rinse with water, then dip in the activation solut...

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Abstract

The present invention discloses palladium or palladium alloy membrane based on wall-flow honeycomb ceramic, and a preparation method and application thereof. According to the invention, wall-flow honeycomb ceramic is used as a substrate, and a chemical plating manner or a chemical plating and electroplating combination manner is used for depositing palladium or palladium alloy membrane on the substrate. The membrane is efficient hydrogen permeation membrane being suitable for hydrogen separation, and has a high separation area / volume ratio, so that a hydrogen separator becomes relatively compact and efficient.

Description

technical field [0001] The invention relates to a high-efficiency hydrogen permeable membrane for hydrogen separation, in particular to a wall-flow honeycomb ceramic type palladium or palladium alloy membrane, which has a higher separation area / volume ratio and is especially suitable for hydrogen membrane separators . Background technique [0002] At present, the voice of global energy shortage is increasing day by day, and the development and utilization of renewable energy are getting more and more attention, which is considered to be an effective means to alleviate the energy and environmental problems faced by the sustainable development of human society. With the rapid development of hydrogen fuel cell technology, hydrogen energy, as a clean and efficient renewable energy, has shown broad market prospects in transportation, military, power generation and other fields, and will occupy an increasingly important position in the future energy structure. [0003] Among vari...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/02B01D67/00B01D53/22C01B3/50
Inventor 胡小娟黄彦丁维华黎月华
Owner 南京髙谦功能材料科技有限公司
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