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Catalyst for removing oxygen in hydrogen and its preparation method and application

A catalyst and hydrogen technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, catalyst carrier, etc., can solve the problem that the hydrogen content should not exceed 2%, and the hydrogen content of hydrogen production equipment should not be low 99.5%, the oxygen content does not exceed 0.5%, the danger of oxygen, the high temperature of deoxidation operation, etc., to achieve high dispersion and uniformity, enhance the service life, and the effect of simple preparation method

Active Publication Date: 2020-05-19
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of production, transportation and use of hydrogen, it is often necessary to meet high purity requirements; in the process of electrolytic hydrogen production, oxygen, as one of the products, often exists in large amounts in the obtained hydrogen, and hydrogen is flammable and flammable. Explosive gas can easily react violently with oxygen, causing dangerous accidents
In addition, different industries and uses have different requirements for the purity of hydrogen: in hydrogen-cooled generator systems, the oxygen content of hydrogen in the hydrogen cooling system should not exceed 2%, and the hydrogen content of hydrogen production equipment should not be lower than 99.5%. The oxygen content does not exceed 0.5%. For hydrogenation in the general petrochemical industry, the requirements for hydrogen purity increase with the increase in the pressure of the hydrogenation process and the pressure difference of the system. Especially for high-pressure hydrogen, the existence of oxygen is very dangerous. ;Some industries that require high purity of hydrogen often require impurities such as oxygen to be at the PPB level. For example, in the polysilicon production process in the semiconductor industry, the purity of hydrogen is required to reach more than 99.9999%, so it is necessary to carry out deep deoxygenation and purification of hydrogen
[0005] The existing hydrogen deoxidation process is relatively complicated, the deoxidation effect is poor, the equipment investment cost is large, and the deoxidation operation temperature is high, which leads to high energy consumption. Low-consumption hydrogen deoxidation product and method

Method used

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  • Catalyst for removing oxygen in hydrogen and its preparation method and application
  • Catalyst for removing oxygen in hydrogen and its preparation method and application
  • Catalyst for removing oxygen in hydrogen and its preparation method and application

Examples

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Embodiment 1

[0047] A catalyst for removing oxygen from hydrogen, comprising a metal precursor and a support, whose general chemical formula is PtRuFe / TiO 2 , wherein the metal precursors, in terms of weight percentage, are loaded with Pt 0.6%, Ru 0.3%, Fe 0.2%; titanium dioxide mass percentage is 98.9%.

[0048] Further, the catalyst is gray powder with a specific surface area of ​​100m 2 / g.

[0049] The preparation method of above-mentioned catalyst, comprises the following steps:

[0050] (1) configuration contains Pt, Ru, the ethylene glycol solution I of the soluble salt of Fe;

[0051](2) configure the ethylene glycol solution II of sodium hydroxide with a molar concentration of 1mol / mL;

[0052] (3) The carrier titanium dioxide does not need to be pre-treated. It is directly weighed into a three-neck round bottom flask, added with ethylene glycol, and fully ultrasonically dispersed to form a suspension;

[0053] (4) measure ethylene glycol solution 1, place ultrasonic dispersio...

Embodiment 2

[0064] A catalyst for removing oxygen from hydrogen, comprising a metal precursor and a carrier; its general chemical formula is Pt / TiO 2 , the metal precursor is Pt, and the amount of Pt is 1% by weight percentage; the mass percentage of titanium dioxide is 99%.

[0065] Further, the catalyst is gray powder with a specific surface area of ​​50m 2 / g.

[0066] Further, the particle diameter of Pt is 3.2 nm.

[0067] The preparation method of above-mentioned catalyst, comprises the following steps:

[0068] (1) configuration contains the ethylene glycol solution I of the soluble salt of Pt;

[0069] (2) configure the ethylene glycol solution II of sodium hydroxide with a molar concentration of 1mol / mL;

[0070] (3) The carrier titanium dioxide does not need to be pre-treated. It is directly weighed into a three-neck round bottom flask, added with ethylene glycol, and fully ultrasonically dispersed to form a suspension;

[0071] (4) measure ethylene glycol solution 1, place...

Embodiment 3

[0080] A catalyst for removing oxygen from hydrogen, comprising a metal precursor and a carrier; its general chemical formula is Pt / Al 2 o 3 , the metal precursor is Pt, and the amount of Pt is 5% by weight percentage; the mass percentage of aluminum oxide is 95%.

[0081] Further, the catalyst is gray powder with a specific surface area of ​​200m 2 / g.

[0082] Further, the particle size of Pt is 1.6 nm.

[0083] The preparation method of above-mentioned catalyst, comprises the following steps:

[0084] (1) configuration contains the ethylene glycol solution I of the soluble salt of Pt;

[0085] (2) configure the ethylene glycol solution II of sodium hydroxide with a molar concentration of 1mol / mL;

[0086] (3) The carrier aluminum oxide is crushed and ground to less than 300 mesh before use, and roasted in the air at 500°C for 2 hours, stored in a desiccator for later use, weighed into a three-neck round bottom flask before use, and added ethylene glycol, Fully ultraso...

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Abstract

The invention discloses a catalyst for removing oxygen from hydrogen. The catalyst comprises a metal precursor and a carrier, wherein the metal precursor comprises 0.01-5% by weight of Pt, and the carrier is any one selected from titanium dioxide, aluminum oxide, carbon black and multi-walled carbon nano-tubes. The invention further discloses an ethylene glycol reduction preparation method of thecatalyst, and a specific method for applying the catalyst in hydrogen deoxidizing. According to the present invention, the catalyst has advantages of high deoxidation activity, strong stability and long service life; the preparation method is simple and controlled; and the method for deoxidizing hydrogen by using the catalyst is simple, flexible and efficient, and is convenient for industrialization and popularization.

Description

technical field [0001] The invention relates to the field of gas purification, in particular to a catalyst for removing oxygen from hydrogen and its preparation method and application. [0002] technical background [0003] Hydrogen energy is clean, efficient and sustainable, and is regarded as one of the energy carriers with the most development potential in the 21st century. At present, hydrogen is widely used in fuel cells, protective gas in the electronics industry, oil refining in the oil refining industry, and large-scale steam turbine power generation. Unit cooling medium and float glass production and other fields. [0004] In the process of production, transportation and use of hydrogen, it is often necessary to meet high purity requirements; in the process of electrolytic hydrogen production, oxygen, as one of the products, often exists in large amounts in the obtained hydrogen, and hydrogen is flammable and flammable. Explosive gas can easily react violently with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42B01J23/89B01J32/00B01J37/34B01J37/08C01B3/58
CPCB01J21/04B01J21/063B01J21/18B01J21/185B01J23/42B01J23/8906B01J23/8913B01J23/892B01J37/088B01J37/343C01B3/58C01B2210/0006
Inventor 陈秉辉张华孙菡蕾郑进保张诺伟
Owner XIAMEN UNIV
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