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Lanthanum nickel alloy-expanded graphite solid compound adsorbent and preparation method thereof

A technology of expanded graphite and composite adsorption, which is applied in chemical instruments and methods, alkali metal compounds, and other chemical processes, can solve the problems of easy deposition of lanthanum-nickel alloys and difficult composite adsorbents, etc., and achieve shortened heating and desorption time, axial Effects of improved thermal conductivity and increased radial thermal conductivity

Inactive Publication Date: 2009-01-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art, to provide a lanthanum-nickel alloy-expanded graphite solid composite adsorbent and its preparation method, so that when the lanthanum-nickel alloy and expanded graphite are mixed, the lanthanum-nickel alloy is easy to deposit on the graphite bottom layer , making it difficult to form composite adsorbents

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  • Lanthanum nickel alloy-expanded graphite solid compound adsorbent and preparation method thereof

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Embodiment 1

[0015] 1. Preparation of lanthanum-nickel alloy-expanded graphite solid composite adsorbent:

[0016] The production process of the whole solidified composite adsorbent is as follows: firstly, the production density is 5kg / m 3 1. A solidified expanded graphite concave matrix block (1) with a quality of 8g is cylindrical in shape, and the top face is recessed inwardly to form a cylindrical inner container; It is placed inside the ring of the solidified expanded graphite concave matrix block (1) to form a composite adsorbent unit (4). Then prepare another composite adsorbent unit according to the same method, and arrange the two composite adsorbent units sequentially from the bottom to the top in the order of the graphite concave matrix block-lanthanum-nickel alloy interlayer, and the final preparation density is 5kg / m 3 1. A solidified expanded graphite top layer matrix block (3) with a mass of 8g. The matrix block is cylindrical in shape, placed on the topmost lanthanum-nic...

Embodiment 2

[0023] 1. Preparation of lanthanum-nickel alloy-expanded graphite solid composite adsorbent:

[0024] The production process of the whole solidified composite adsorbent is as follows: firstly, the production density is 10kg / m 3 1. A solidified expanded graphite concave matrix block (1) with a quality of 8g is cylindrical in shape, and the top surface is sunken inward to form a cylindrical inner container; then 14.6g of lanthanum-nickel alloy is used as a lanthanum-nickel alloy interlayer (2) evenly Lay on the inside of the solidified expanded graphite concave matrix block (1) to form a composite adsorbent unit (4), and then prepare another composite adsorbent unit in the same way, and start from the bottom to the top according to graphite The sequence of concave matrix block-lanthanum-nickel alloy interlayer is to arrange two composite adsorbent units in sequence, and the final preparation density is 10kg / m 3 1. A solidified expanded graphite top layer matrix block (3) with a...

Embodiment 3

[0031] 1. Preparation of lanthanum-nickel alloy-expanded graphite solid composite adsorbent:

[0032] The production process of the whole solidified composite adsorbent is as follows: firstly, the production density is 15kg / m 3 1. A solidified expanded graphite concave matrix block (1) with a quality of 8g is cylindrical in shape, and the top surface is recessed inwardly to form a cylindrical inner container; It is placed inside the ring of the solidified expanded graphite concave matrix block (1) to form a composite adsorbent unit (4). Then prepare another composite adsorbent unit according to the same method, and arrange two composite adsorbent units sequentially from the bottom to the top in the order of graphite concave matrix block-lanthanum nickel alloy interlayer, and finally prepare a density of 15kg / m 3 1. A solidified expanded graphite top layer matrix block (3) with a mass of 8g. The matrix block is cylindrical in shape, placed on the topmost lanthanum-nickel all...

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Abstract

The invention discloses a lanthanum-nickel alloy and expandable graphite composite adsorbent. The adsorbent is composed of a composite adsorbent unit and an expandable graphite solidifying top-layer matrix block, wherein, the composite adsorbent unit is composed of an expandable graphite solidifying concave matrix block and a lanthanum-nickel alloy interlayer; the expandable graphite solidifying concave matrix block is cylindrical, and the top surface is sunken inward to form a cylindrical inner vessel; the lanthanum-nickel alloy interlayer is laid in the cylindrical inner vessel; the expandable graphite solidifying top-layer matrix block is positioned at the top end of the composite adsorbent unit at the uppermost layer. The solidifying composite adsorbent in the invention has the advantages of higher radial conductivity, higher axial conductivity, higher hydrogen absorption rate and shorter heat and desorption time, and simultaneously solves the problems that the density difference of expandable graphite and lanthanum-nickel alloy is large and the solidifying adsorbent is difficult to mix and manufacture.

Description

technical field [0001] The invention relates to an adsorbent in the technical field of composite materials and a preparation method thereof, in particular to a lanthanum-nickel alloy-expanded graphite solid composite adsorbent and a preparation method thereof. Background technique [0002] As an important means to store hydrogen in the form of hydride, lanthanum-nickel alloy has become a more important hydrogen storage in the field of adsorption hydrogen storage due to its advantages of low pressure, fast hydrogen absorption and desorption, and stable performance in the hydrogen storage process. alloy. However, the lanthanum-nickel alloy also has the disadvantage that it is easy to pulverize during the hydrogen absorption and desorption process. This pulverization process will cause a significant decrease in heat transfer performance, resulting in a large attenuation of its hydrogen absorption and desorption speed. To solve this kind of problem, some researchers proposed so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30
Inventor 王丽伟王如竹冯超曹文学
Owner SHANGHAI JIAO TONG UNIV
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