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Palladium-based dual functional film and its preparation method

A dual-function, palladium-based technology, applied in separation methods, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as hydrogen consumption, reduce costs and energy consumption, and achieve the effects of simple and easy preparation methods

Active Publication Date: 2012-05-09
RISON HI TECH MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since carbon dioxide is also easy to methanate under the same conditions, if the hydrogen source obtained by hydrogen production from fossil fuels is directly catalytically methanated, a large amount of hydrogen will be consumed

Method used

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  • Palladium-based dual functional film and its preparation method
  • Palladium-based dual functional film and its preparation method
  • Palladium-based dual functional film and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A palladium-based bifunctional membrane, comprising a palladium membrane deposited on the surface of a tubular porous ceramic, a methanation catalyst is loaded in the porous ceramic channel, and its preparation method comprises the following steps (see figure 1 and figure 2 ):

[0039] (1). A tubular porous ceramic with an average pore size of 3 μm and a maximum pore size of 9 μm was selected as the carrier of the bifunctional membrane. Before use, the carrier was first cleaned with commercially available detergent, then boiled and washed with hot deionized water, and then dried in an oven at 120°C.

[0040] (2). Immerse the support in saturated Ni(NO 3 ) 2 solution, take it out after 24 hours, and dry it in an oven at 120°C. Then the impregnated carrier was calcined at 450 °C in an air atmosphere for 3 hours. from figure 2 From (a) to (c), it can be seen that the surface of the carrier is uniformly covered with NiO particles after being impregnated and calcine...

Embodiment 2

[0046] A palladium-based bifunctional membrane comprises a palladium membrane deposited on the surface of a porous ceramic, and a methanation catalyst is loaded in the pores of the porous ceramic, and its preparation method comprises the following steps:

[0047] (1). Asymmetric porous ceramics with an average pore size of 0.1 μm and a maximum pore size of 0.2 μm were selected as the carrier of the bifunctional membrane. Before use, the carrier was first cleaned with commercially available detergent, and then washed with hot deionized water. , and then dried in an oven at 120°C.

[0048] (2). Immerse the support in Pd(OH) 2 In the colloid (the preparation of the colloid: weigh 0.2 g PdCl 2 Add 0.06 g NaOH to 20 ml deionized water, shake well, and ultrasonically shake for 0.5 hours), take it out after 24 hours, and dry it in an oven at 120 °C. Then the impregnated carrier was calcined at 450 °C in an air atmosphere for 3 hours.

[0049] (3). The palladium film was prepared b...

Embodiment 3

[0053] A palladium-based bifunctional membrane comprises a palladium membrane deposited on the surface of a porous ceramic, and a methanation catalyst is loaded in the pores of the porous ceramic, and its preparation method comprises the following steps:

[0054] (1). Asymmetric porous ceramics are selected as the carrier, with an average pore size of 0.5 μm and a maximum pore size of about 5 μm. The carrier was washed with commercially available detergent, washed with deionized water, and then dried in an oven at 120 °C.

[0055] (2). The sol-gel method is used to modify the carrier to increase the specific surface area of ​​the carrier. The composition of the sol and the ratio of each component are: γ-AlOOH sol, polyethylene glycol and 8 wt.% polyvinyl alcohol, and the volume ratio of the three is 1: 0.007: 0.2. The carrier channels and inner and outer surfaces were dip-coated with sol by vacuum impregnation method, and then aged in a constant temperature and humidity box a...

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Abstract

The invention discloses a palladium-based dual functional film and its preparation method. The palladium-based dual functional film contains a palladium film or palladium alloy film deposited on the surface of porous ceramics and is characterized in that pore channels of the porous ceramics are loaded with a methanation catalyst. The preparation method comprises steps of: loading the methanation catalyst into the pore channels of the porous ceramics by an immersion method and preparing the palladium or palladium alloy film on the surface of the porous ceramics by a chemical plating or chemical plating and electroplating coupling method. According to the palladium-based dual functional film, the methanation catalyst is loaded in the pore channels of the palladium film or palladium alloy film porous carrier so as to realize the coupling of film separation and carbon monoxide catalytic methanation. When the film is used for hydrogen separation and purification, trace carbon monoxide and carbon dioxide leaked from defects of the film can undergo catalytic methanation, thus satisfying special hydrogen requirements. The preparation technology of the palladium-based dual functional film provided by the invention is mature, simple and easy to operate, and can be suitable for industrial application.

Description

technical field [0001] The invention relates to a palladium-based metal membrane and a preparation method thereof, in particular to a palladium-based bifunctional membrane and a preparation method thereof. The palladium-based bifunctional membrane of the invention can realize the coupling of hydrogen purification and carbon monoxide methanation. Background technique [0002] Hydrogen is considered to be an efficient and clean energy that is most likely to be put into practical use in large quantities in the future. However, at present, most of the hydrogen in the world is converted from fossil fuels, and the converted hydrogen often contains some impurities such as carbon monoxide and carbon dioxide. In order to meet the purity requirements of hydrogen, it is necessary to separate and purify the hydrogen source. In addition, certain application areas have high requirements for the content of carbon monoxide in hydrogen, such as for proton exchange membrane fuel cells (PEMFC...

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D69/10B01J35/02B01J37/02B01D53/22C01B3/50C01B3/58
Inventor 黄彦严文俊胡小娟
Owner RISON HI TECH MATERIALS CO LTD
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