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Titanium-based catalyst doped NaAlH4 composite hydrogen storage system and preparation method thereof

A catalyst, titanium-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of reducing the reversible hydrogen storage capacity of the catalytic system, achieve low cost, increase hydrogen storage capacity, Response to controllable effects

Active Publication Date: 2020-10-16
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the catalytic process, titanium-based halides can interact with NaAlH 4 The reaction produces an inert by-product, sodium halide, which reduces the reversible hydrogen storage capacity of the catalytic system

Method used

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  • Titanium-based catalyst doped NaAlH4 composite hydrogen storage system and preparation method thereof
  • Titanium-based catalyst doped NaAlH4 composite hydrogen storage system and preparation method thereof
  • Titanium-based catalyst doped NaAlH4 composite hydrogen storage system and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0031] TiAl 3 The preparation method of @C catalyst:

[0032] Will Cp 2 TiCl 2 and LiAlH 4 After mixing according to the ratio of 1:3, ball milled on a planetary ball mill for 3 hours at a speed of 200 rpm, and the obtained composite was sintered at 400°C for 3 hours under the protection of an argon atmosphere, and then slowly cooled to room temperature. After the above product was washed three times with absolute ethanol, it was vacuum-dried at 140 °C for 6 h to obtain the final TiAl 3 @C Catalyst, see attached figure 1 .

Embodiment 1

[0034] In a glove box protected by an argon atmosphere, the NaAlH 4 and TiAl 3 @C According to the chemical composition x(NaAlH 4 )-y(TiAl 3 The percentage of @C) was mixed (x=2wt%, y=98wt%). Put the above mixture in a ball mill tank, fill it with 2MPa hydrogen, and then put it into a planetary ball mill with a ball-to-material ratio of 40:1 and a rotation speed of 400rpm. The program is set to stop for 10 minutes every 30 minutes of ball milling, and mill for 20 hours to obtain TiAl 3 @C catalyzed NaAlH4 Composite hydrogen storage system.

Embodiment 2

[0036] In a glove box protected by an argon atmosphere, the NaAlH 4 and TiAl 3 @C According to the chemical composition x(NaAlH 4 )-y(TiAl 3 The percentage of @C) was mixed (x=2wt%, y=98wt%). Put the above mixture in a ball mill tank, fill it with 4MPa hydrogen, and then put it into a planetary ball mill with a ball-to-material ratio of 40:1 and a rotation speed of 400rpm. The program is set to stop for 10 minutes every 30 minutes of ball milling, and mill for 10 hours to obtain TiAl 3 @C catalyzed NaAlH 4 Composite hydrogen storage system.

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Abstract

The invention discloses a NaAlH4 composite hydrogen storage system doped with a carbon-loaded TiAl3 compound catalyst (marked as TiAl3@C) and a preparation method of the NaAlH4 composite hydrogen storage system. The synthesis process of TiAl3@C comprises the following steps: carrying out ball milling on Cp2TiCl2 and LiAlH4 according to a certain molar ratio, sintering the product in an argon atmosphere, cleaning, and carrying out vacuum drying to obtain the TiAl3@C. The composite hydrogen storage system is prepared by carrying out ball milling on TiAl3@C and NaAlH4 in a hydrogen atmosphere. The preparation method has the advantages that the prepared NaAlH4-TiAl3-C composite hydrogen storage system is high in hydrogen storage capacity and low in hydrogen desorption temperature, the preparation process is simple and reliable, and the system has wide application prospects.

Description

technical field [0001] The invention relates to the field of solid hydrogen storage materials, in particular to a titanium-based catalyst doped NaAlH 4 Composite hydrogen storage material system and preparation method thereof. Background technique [0002] With the rapid growth of population and the continuous improvement of the degree of industrialization, the demand for energy is increasing day by day, while the problems of drastic reduction of traditional fossil energy and drastic increase of environmental pollution are prominent. Therefore, the development of renewable and clean energy has become an inevitable requirement for the sustainable development of human society. . As an efficient and renewable green energy, hydrogen energy, its large-scale development and application is expected to solve the current double crisis of excessive consumption of fossil energy and environmental pollution, so it has attracted the attention of countries all over the world. The large-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00C01B6/24B01J21/18
CPCC01B3/001C01B6/243B01J21/18C01P2002/72C01P2004/04Y02E60/32
Inventor 曹志杰李丽江马晓波
Owner NINGXIA UNIVERSITY
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