Magnesium base hydride composite system for hydrolysis hydrogen production and preparation method and application thereof

A technology for magnesium-based hydride and hydrogen production by hydrolysis, which is applied in the field of a magnesium-based hydride composite system for hydrolysis and hydrogen production and its preparation, and can solve the problems of poor hydrolysis reaction kinetic performance, harsh hydride production conditions, and low effective hydrogen production. and other problems, to achieve the effect of simple and easy hydrogen production facilities, low hydrogen production environment requirements, and high hydrolysis activity

Inactive Publication Date: 2012-04-25
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the kinetics of the hydrolysis reaction of magnesium-based hydrides is poor, and the effective hydrogen production is low.
At the same time, the preparation conditions of the hydride are harsh. The traditional preparation method needs to react with hydrogen at 300-400 ° C and a pressure of 40 MPa, and the preparation cost is relatively high.

Method used

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  • Magnesium base hydride composite system for hydrolysis hydrogen production and preparation method and application thereof
  • Magnesium base hydride composite system for hydrolysis hydrogen production and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh a total of 10g of magnesium powder and nickel powder at a molar ratio of 40:1, mix with 0.3g of alum powder evenly, add an appropriate amount of acetone (the ratio of the total weight of the mixture of magnesium powder and nickel powder is 1 to 2:1ml / g), and ultrasonically Mix for 1 hour and dry it in an oven at 326K. Put the mixture in a synthesis furnace, vacuumize the furnace chamber to 25Pa, pass in argon to clean, repeat 3 times and then pass in hydrogen with a purity of 99.999%, the initial hydrogen pressure is 2.0MPa, at an average speed of 10K / min Raise the temperature to 823K, and then keep it at this temperature for 1 hour to completely alloy the magnesium-nickel metal powder. Naturally lower the temperature to 623K and keep it warm for 10 hours to completely hydrogenate the metal powder. Then cool down to room temperature naturally.

[0038] Put 1 g of the hydrogenated combustion synthesis product obtained above into a ball mill jar, and then flush it...

Embodiment 2

[0040] Weigh a total of 10g of magnesium powder and nickel powder at a molar ratio of 45:1, mix with 0.3g of aluminum powder evenly, add an appropriate amount of acetone (the ratio of the total weight of the mixture of magnesium powder and nickel powder is 1 to 2:1ml / g), and ultrasonically Mix for 1 hour and dry it in an oven at 326K. Put the mixture in a synthesis furnace, vacuumize the furnace chamber to 25Pa, pass in argon to clean, repeat 3 times and then pass in hydrogen with a purity of 99.999%, the initial hydrogen pressure is 2.0MPa, at an average speed of 10K / min Raise the temperature to 823K, and then keep it at this temperature for 1 hour to completely alloy the magnesium-nickel metal powder. Naturally lower the temperature to 623K and keep it warm for 10 hours to completely hydrogenate the metal powder. Then cool down to room temperature naturally.

[0041] Put 1 g of the hydrogenated combustion synthesis product obtained above into a ball mill jar, and then flus...

Embodiment 3

[0043] Weigh a total of 10g of magnesium powder and nickel powder at a molar ratio of 49:1, mix with 0.5g of lanthanum powder evenly, add an appropriate amount of acetone (the ratio of the total weight of the mixture of magnesium powder and nickel powder is 1 to 2:1ml / g), and ultrasonically Mix for 1 hour and dry it in an oven at 326K. Put the mixture in the synthesis furnace, vacuum the furnace cavity to 25Pa, pass in argon to clean, repeat several times and then pass in hydrogen with a purity of 99.999%, the initial hydrogen pressure is 2.0MPa, and the average speed is 10K / min Raise the temperature to 823K, and then keep it at this temperature for 1 hour to completely alloy the magnesium-nickel metal powder. Naturally lower the temperature to 623K and keep it warm for 2 hours to completely hydrogenate the metal powder. Then cool down to room temperature naturally.

[0044] Put 1 g of the hydrogenated combustion synthesis product obtained above into a ball mill jar, and the...

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PUM

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Abstract

The invention discloses a magnesium base hydride composite system for hydrolysis hydrogen production and a preparation method and application thereof. The composite system is prepared by a method comprising the following steps of: taking magnesium powder and nickel powder in a mole ratio of 30:1-49:1; performing hydrogenation combustion synthesis under the action of a catalyst and an organic dispersant which account for 3 to 10 percent of the total weight of the mixture of the magnesium powder and the nickel powder; and performing strong mechanical ball milling. The magnesium hydride in the prepared magnesium base hydride composite system for the hydrolysis hydrogen production accounts for 95 to 98 percent of the weight of hydride, and the magnesium nickel hydride accounts for 2 to 5 percent; the catalyst is one of graphite, B, Al, La, Ca, V, Ce and Nb; the magnesium hydride is MgH2; and the magnesium nickel hydride is a mixture of Mg2NiH4 and Mg2NiH0.3 in any ratio. The theoretical hydrogen production amount of the composite system is up to 1,600 ml / g, and a preparation process of the magnesium base hydride composite system is time-saving, energy-saving and simple and is easy forindustrial production.

Description

Technical field: [0001] The invention relates to the technical field of energy chemistry and chemical power supply products, in particular to a magnesium-based hydride composite system for hydrogen production by hydrolysis, a preparation method thereof, and an application for hydrogen production. Background technique: [0002] With the development of society, people's demand for energy is increasing, traditional fossil energy is becoming exhausted, CO 2 The emissions are causing the greenhouse effect to become more and more serious. Under such circumstances, people urgently need to develop new green alternative energy sources, and hydrogen energy is one of the most promising forms of energy. Hydrogen is a high-energy-density, clean new energy with a wide range of sources, and it has no toxic side effects on the human body. In recent years, fuel cells have developed rapidly, especially proton exchange membrane fuel cells, which are expected to become an important power gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B6/04C01B6/02C01B3/04
CPCY02E60/364Y02E60/36
Inventor 李李泉朱云峰沈品
Owner NANJING TECH UNIV
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