Method of promoting coordinate alanate and ammonium salt to react by solvent to prepare hydrogen

An aluminum hydride and coordination technology, applied in the production of hydrogen, etc., to achieve the effects of energy saving, mature production technology, great practicability and commercial value

Inactive Publication Date: 2014-04-30
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiency that most of the existing solid-state hydrogen storage technologies require high temperature to desorb hydrogen, and to provide a method of using a solvent to promote the reaction of alkali metal or alkaline earth metal coordination aluminum hydride and ammonium salt to produce hydrogen. Efficient release of hydrogen without providing additional energy

Method used

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  • Method of promoting coordinate alanate and ammonium salt to react by solvent to prepare hydrogen
  • Method of promoting coordinate alanate and ammonium salt to react by solvent to prepare hydrogen
  • Method of promoting coordinate alanate and ammonium salt to react by solvent to prepare hydrogen

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Add 0.005mol LiAlH 4 And 0.005mol NH 4 F (LiAlH 4 With NH 4 The molar ratio of F is 1:1). Put into the flask, add 10mL DME (the amount of solvent is 2L / mol LiAlH 4 ), react under stirring at 85°C, and collect hydrogen by drainage gas collection method. Such as figure 1 As shown, the reaction produces about 6.71 wt% hydrogen in 60 minutes, and about 6.90 wt% hydrogen in 120 minutes.

Embodiment 2

[0035] Add 0.005mol LiAlH 4 And 0.005mol NH 4 Cl (LiAlH 4 With NH 4 The molar ratio of Cl is 1:1) Put it into the flask and add 10mL Et 2 O (the amount of solvent is 2L / mol LiAlH 4 ), react under stirring at 25°C, and collect hydrogen by drainage gas collection method. Such as figure 2 As shown, the reaction produces about 5.08 wt% hydrogen in 90 minutes, and a total of about 5.29 wt% hydrogen in 180 minutes.

Embodiment 3

[0037] Add 0.005mol LiAlH 4 And 0.005mol(NH 4 ) 2 SO 4 (LiAlH 4 With (NH 4 ) 2 SO 4 The molar ratio is 1:1) into the flask, add 10mL THF (the amount of solvent is 2L / mol LiAlH 4 ), react under stirring at 25°C, and collect hydrogen by drainage gas collection method. Such as image 3 As shown, about 3.56% by weight of hydrogen is produced within 15 minutes, and basically no hydrogen is produced after the reaction continues.

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Abstract

The invention relates to a method of promoting coordinate alanate and ammonium salt to react by a solvent to prepare hydrogen. The chemical formula of the coordinate alanate is M(AlH4)m, wherein M is an alkali metal or alkaline earth capable of forming coordinate hydride, and m is the valence of the alkali metal or alkaline earth; the chemical formula of ammonium salt is (NH4)nX, wherein X is an acidic group and n is the valence of the acidic group. The method comprises the following steps: adding the coordinate alanate, the ammonium slat and the solvent into a reactor to be mixed, thus accelerating reaction of the coordinate alanate and the ammonium slat by the solvent, wherein the molar ratio of the coordinate alanate to the ammonium slat is (0.38-4.55):1, and the use level of the solvent is 0.4-100L/mol of the coordinate alanate. According to the method, the coordinate alanate is just contacted with the ammonium salt without heating, and the solvent provides the reaction environment, so that reaction can be carried to generate hydrogen. The method can efficiently release hydrogen under a condition of not providing extra energy sources.

Description

Technical field [0001] The invention belongs to the technical field of hydrogen production by the reaction of coordinated aluminum hydride and ammonium salt, and particularly relates to a method for hydrogen production by reacting coordinated aluminum hydride and ammonium salt without heating and at low temperature. Background technique [0002] Hydrogen storage is one of the main technical problems in the current economic transition of hydrogen energy. At present, there are three main types of hydrogen storage technologies: high-pressure gaseous hydrogen storage, low-temperature liquefaction hydrogen storage, and solid-state hydrogen storage. Compared with high-pressure gaseous hydrogen storage and low-temperature liquefaction hydrogen storage, the interaction between hydrogen and materials forms a solid solution or a solid state of hydride. The hydrogen storage method is the most promising hydrogen storage technology due to its high safety and energy density. In solid hydrogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/04
CPCY02E60/36
Inventor 陈云贵王小炼吴朝玲
Owner SICHUAN UNIV
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