Hydroborate hydrolysis catalyst for preparing hydrogen and its preparation method

A technology for producing hydrogen and borohydride by hydrolysis, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problem of wide particle size distribution and uneven particle distribution , Low catalytic efficiency and other issues, to achieve the effect of low cost, uniform particle size distribution and high catalytic activity

Inactive Publication Date: 2012-02-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the problems of high cost of noble metal catalysts in the prior art, and the problems of low catalytic efficiency, uneven particle distribution, wide particle distribution size, and inclusion of heterogeneous phases in metal boride catalysts, one of the purposes of the present invention is to provide a Borohydride hydrolysis hydrogen production catalyst, the hydrogen production catalyst is low in price, easy to obtain raw materials, high in activity, and does not contain other impurities except metal elements and boron elements

Method used

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  • Hydroborate hydrolysis catalyst for preparing hydrogen and its preparation method
  • Hydroborate hydrolysis catalyst for preparing hydrogen and its preparation method
  • Hydroborate hydrolysis catalyst for preparing hydrogen and its preparation method

Examples

Experimental program
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Embodiment 1

[0040] Place the reactor in an environment of 4°C, under the stirring condition of a magnetic stirrer, add 0.1mol / L, 100mL of CoCl 2 The solution was added to the reactor. Then, at a rate of 1 mL / min, add excess NaBH with NaOH to adjust the pH value to 12 dropwise. 4 Solution (0.5mol / L, 100mL), continued to stir for 0.5h after the dropwise addition to ensure complete reaction, and precipitate 1 was obtained. The obtained precipitate 1 was washed three times with deionized water and then suction-filtered to obtain precipitate 2. Put the precipitate 2 into a cold trap, drop to -90°C together with the cold trap, and freeze at -90°C for 3 hours at a cooling rate of 15°C / min. After freezing, vacuumize to sublimate the liquid in the sediment 2 to realize the drying process. Under the conditions of vacuum degree ≤ 10.0Pa (the vacuum degree can be maintained at ≤ 10.0Pa under the technical conditions of this experiment, the vacuum degree is constantly changing in the actual experim...

Embodiment 2

[0042] Place the reactor in an environment of 4°C, under the stirring condition of a magnetic stirrer, add 0.1mol / L, 100mL of CoCl 2 The solution was added to the reactor. Then, at a rate of 5 mL / min, add excess NaBH with NaOH to adjust the pH value to 12 dropwise. 4 solution (0.1mol / L, 100mL), continue to stir for 0.5h after the dropwise addition to ensure the completion of the reaction, drive away the hydrogen bubbles, and obtain precipitate 1. The obtained precipitate 1 was washed three times with deionized water and then suction-filtered to obtain precipitate 2. Put the precipitate 2 into a cold trap, drop to -90°C together with the cold trap, and freeze at -90°C for 3 hours at a cooling rate of 15°C / min. After freezing, vacuumize to sublimate the liquid in the sediment 2 to realize the drying process. Under the conditions of vacuum degree ≤ 10.0Pa (the vacuum degree can be kept at ≤ 10.0Pa under the technical conditions of this experiment, the vacuum degree is constant...

Embodiment 3

[0044] Place the reactor in an environment of -8°C, under the stirring condition of a magnetic stirrer, add 0.1mol / L, 100mL of CoCl 2 The solution was added to the reactor. Then, at a rate of 5 mL / min, add excess NaBH with ammonia water to adjust the pH value to 12 dropwise. 4 solution (0.5mol / L, 100mL), continue to stir for 0.5h after the dropwise addition to ensure the completion of the reaction, drive away the hydrogen bubbles, and obtain precipitate 1. The obtained precipitate 1 was washed three times with absolute ethanol and once with deionized water, and then suction-filtered to obtain precipitate 2, which was placed in a refrigerator at -4°C for 1 hour. The temperature of the cold trap was lowered to -90°C, and the precipitate 2 placed in the -4°C refrigerator for 1 hour was put into the cold trap, and frozen at -90°C for 6 hours. After freezing, vacuumize to sublimate the liquid in the sediment 2 to realize the drying process. Under the conditions of vacuum degree ...

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Abstract

The invention discloses a hydroborate hydrolysis catalyst for preparing hydrogen and its preparation method, belonging to the technical field of hydrogen production and energy sources. The chemical composition of the catalyst is represented as MxB, wherein, M represents one or more of Fe, Ti, Cu, Zn, Al, Zr, Nd, Mo, V, Cr, Co, Ni, Ag or Mg, x is no less than 1 and no larger than 4 and can be a non-integer. The catalyst comprises a monodispersed boride material, and the catalyst has high specific surface area, uniform particle size distribution, and high catalytic activity, and the dehydrogenation rate can reach more than 95 %. The invention also discloses a preparation method of the catalyst, characterized by carrying out solution chemical reaction and vacuum freeze treatment at low temperature to obtain a predecessor, then carrying out heat treatment to obtain the catalyst. The preparation method has the advantages of rapid early-stage reaction, simple and convenient post-treatment and strong operability.

Description

technical field [0001] The invention relates to a borohydride hydrolysis hydrogen production catalyst and a preparation method thereof, belonging to the technical field of hydrogen production and energy. Background technique [0002] In recent years, the development and application of hydrogen energy has been highly valued by our country and countries around the world. Hydrogen energy is considered to be a clean energy that is expected to replace petrochemical energy. The concept of "hydrogen economy" is gaining popularity. Among the existing hydrogen production technologies, borohydride hydrolysis hydrogen production technology is a safe and convenient new hydrogen generation technology, and it is also a research hotspot in the current catalytic hydrogen generation technology. The borohydride solution system has the advantages of environmental friendliness, high hydrogen storage capacity, and easy control of hydrogen production rate, which provides a new way for high-capaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/755B01J23/745C01B3/06
CPCY02E60/36
Inventor 吴川庞春会吴锋白莹李肖肖
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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