Hydrogen storage material decomposing and hydrogen release system

A hydrogen storage material and hydrogen desorption technology, applied in the direction of hydrogen, reversible hydrogen absorption, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of high cost, unfavorable product recovery and reuse, and low efficiency

Active Publication Date: 2019-01-18
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above methods and catalysts have achieved certain research results in the release of hydrogen from hydrogen storage materials, but there are also the following disadvantages: metal nanoparticles, non-metallic compounds are easily oxidized and metal complexes are not only difficult to prepare but also low in efficiency; when ionic liquids are used as solvents The cost is high; if a catalyst is used to catalyze the hydrogen storage material for hydrolysis to explain hydrogen, it will be affected by the temperature of the system. When the temperature is lower than 273K, the system will be frozen; whether water or ionic liquid is used, it is not conducive to the dehydrogenation of the hydrogen storage material. Recovery and reuse of products, especially ammonia borane (NH 3 BH 3 , AB)

Method used

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  • Hydrogen storage material decomposing and hydrogen release system
  • Hydrogen storage material decomposing and hydrogen release system
  • Hydrogen storage material decomposing and hydrogen release system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～2

[0066] A hydrogen storage material decomposes the hydrogen release system, and measures the influence of the mass ratio of the metal compound in the catalyst on the catalytic rate, that is, changes the ratio of the metal compound in the catalyst in the system, as shown in Table 1, and calculates the hydrogen production rate of the system.

[0067] The system includes 50 mg of ammonia borane, 5 mL of a mixed solution of sodium hydroxide and methanol, 10 mg of CoP and Cu 3 P is a catalyst mixed according to different mass ratios; wherein the concentration of sodium hydroxide in the mixed solution of sodium hydroxide and methanol is 0.6mol / L;

[0068] CoP and Cu 3 Preparation of catalysts mixed with P according to different ratios: different mass ratios of CoP and Cu 3 P was mixed evenly in the grinding platinum, and then each sample was fully ground, and after fully grinding, the catalyst was obtained. Do powder diffraction to the obtained catalyst, the result obtained is as f...

Embodiment 5～10

[0074] A hydrogen storage material decomposes the hydrogen release system, and measures the influence of the amount of alkali in the system on the catalytic rate, that is, the method steps are the same as in Example 2, the only difference is that the concentration of sodium hydroxide in the system is changed, as shown in Table 2, the calculation system the rate of hydrogen production.

[0075] The hydrogen production rate obtained by different sodium hydroxide concentrations in the mixed solution of table 2 sodium hydroxide and methanol

[0076]

[0077] The hydrogen storage material is used to decompose the hydrogen release system to decompose and release hydrogen. At 298K, the catalyst is added to the reaction vessel, and then the mixed solution of sodium hydroxide and methanol dissolved in ammonia borane is injected, and the gas pipe is recorded at different times. volume of hydrogen gas. Draw a curve with each hydrogen volume versus time, such as image 3 shown. From ...

Embodiment 11～15 and comparative example 3～4

[0079] A hydrogen storage material decomposes the hydrogen release system, and measures the influence of the mass ratio of the metal compound in the catalyst on the catalytic rate, that is, changes the amount ratio of the metal compound in the catalyst of the system, as shown in Table 3, and calculates the hydrogen production rate of the system.

[0080] The system includes 50 mg of ammonia borane, 5 mL of a mixed solution of sodium hydroxide and methanol, 10 mg of Fe(OH) 3 and Cu(OH) 2 Catalysts mixed according to different mass ratios; wherein the concentration of sodium hydroxide in the mixed solution of sodium hydroxide and methanol is 0.5mol / L.

[0081] Fe(OH) 3 and Cu(OH) 2 Preparation: In a round bottom flask, add 250mg sodium citrate, 2.0g sodium hydroxide and 80mL distilled water and stir to dissolve to obtain mixed solution 1; dissolve 1g copper nitrate (or ferric nitrate) in 20mL distilled water to obtain mixed solution 2; The mixed solution 2 was slowly added dr...

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Abstract

The invention discloses a hydrogen storage material decomposing and hydrogen release system. The system comprises a hydrogen storage material, a catalyst and a solvent, wherein the catalyst is a mixture of two or more of metal compounds mixed in any proportion. The invention provides the cheap and stable catalytic hydrogen storage material decomposing and hydrogen release system, and the raw materials for catalyst preparation are cheap. The catalyst has stable properties and high hydrogen release efficiency when applied to catalysis of a hydrogen storage material; the catalytic hydrogen release system is heterogeneous catalytic reaction, and the catalyst is convenient to recycle; if the catalytic hydrogen release system is conducted in an organic solvent, the catalytic reaction can be conducted at a temperature of 273 K or lower; in the catalytic hydrogen release system, when the hydrogen storage material is ammonia borane and methanol is used as a solvent, ammonia borane can be obtained again from NH4B(OCH3)4 obtained after alcoholysis under certain conditions.

Description

technical field [0001] The invention relates to the technical field of hydrogen fuel cells. More specifically, it relates to a hydrogen storage material decomposition hydrogen release system. Background technique [0002] With the development of industry and the surge of population, the gradual depletion of fossil fuels and the deterioration of the environment, the development and storage of new clean energy has become the new focus of the development of various countries. Hydrogen, as the cleanest energy, is highly valued by people. Due to the high cost and high risk of direct storage of hydrogen, safe chemical hydrogen storage materials have attracted much attention in the past decade. [0003] At room temperature, chemical hydrogen storage materials can exist stably in the form of solid or liquid, and release hydrogen gas under the condition of heating or external catalyst. Among them, using catalysts to release hydrogen from hydrogen storage materials in water, ionic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J23/745C01B3/00
CPCC01B3/001C01B3/0015B01J23/745B01J27/1853Y02P20/584Y02E60/32
Inventor 陈勇彭成云陈倩倩侯春朝
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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