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Metal hydride stability treatment method

A processing method and hydride technology, applied in the field of materials, can solve the problems of high cost and inconvenient use of storage devices, and achieve the effect of increasing storage time

Active Publication Date: 2013-11-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of traditional storage methods such as inconvenient use and high cost of storage devices, and provide a stable treatment method for metal hydride storage and use under natural conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Put 500mL of tetrahydrofuran in a three-necked flask, install a condenser tube and a thermometer, and pass in nitrogen gas; take metal sodium, cut off the oxidized surface with a knife, then cut it into thin slices, add it to tetrahydrofuran, and heat to 60 ℃; after refluxing for 6 hours, add benzophenone reagent, the solution turns blue, and the blue color becomes deeper and deeper with time, indicating that the water is removed; finally distill tetrahydrofuran;

[0020] (2) Take 2 g of granular methyl methacrylate, add it to a flask containing 100 mL of anhydrous tetrahydrofuran, and raise the temperature to 50 ° C in a water bath until the methyl methacrylate is completely transparent and forms a liquid glue, which is ready for use;

[0021] (3) Take 6g BH 3 NH 3 Crystal, add 60mL of n-heptane anhydrous solvent into a 100mL three-necked flask, heat up to 46°C while stirring, add 7mL of the liquid glue prepared in step (2) dropwise, continue stirring for 30min af...

Embodiment 2

[0025] (1) Add 5g of polystyrene to 100mL of anhydrous butyl acetate, stir, and heat to 45°C until the polystyrene is completely transparent and forms a liquid glue, set aside;

[0026] (2) 20g BH 3 NH 3 Add it into a 200mL three-neck flask and add 140mL of anhydrous toluene, stir and heat up to 50°C, then add 16mL of the liquid glue prepared in step (1) dropwise into the reaction flask, the dropping speed is 45 drops per minute, and the stirring speed is 300r / min, continue to stir for 20min after the dropwise addition, and cool to room temperature to obtain the coated BH 3 NH 3 ;

[0027] (3) The coated BH 3 NH 3 Pour into a funnel and filter, and dry the filtered solid material in an oven at a temperature of 30°C and a vacuum of 0.02 for 12 hours to obtain stabilized BH 3 NH 3 . The stabilized BH 3 NH 3 The initial decomposition temperature is 187°C, increasing the BH 3 NH 3 decomposition temperature.

Embodiment 3

[0029] (1) Add 5g of fluororubber to 100mL of anhydrous ethyl acetate, stir, and heat to 45°C until the fluororubber is completely transparent and forms a liquid glue, set aside;

[0030] (2) 20g BH 3 NH 3 Put it into a 250mL three-neck flask and add 180mL of anhydrous toluene, install a stirrer and a thermometer, stir and heat up to 50°C, add 22mL of the liquid glue prepared in step (1) dropwise into the reaction bottle; the dropping rate is 48 drops per minute , the stirring speed is 320r / min, continue to stir for 25min after the dropwise addition, and cool to normal temperature;

[0031] (3) The coated BH 3 NH 3 Pour into a funnel and filter; put the filtered solid material in an oven with a temperature of 32°C and a vacuum of 0.023 for 10 hours to obtain stabilized BH 3 NH 3 . The stabilized BH 3 NH 3 The initial decomposition temperature is 193°C.

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Abstract

Belonging to the technical field of materials, the invention relates to a metal hydride stability treatment method. The treatment method specifically comprises the steps of: (1) dissolving an adhesive in an anhydrous solvent to prepare a liquid glue; (2) adding the liquid glue into a metal hydride, and conducting stirring to form a liquid glue coated metal hydride; and (3) filtering and drying the liquid glue coated metal hydride to obtain the metal hydride undergoing stability treatment. According to the invention, by forming a compact and uniform organic membrane on the metal hydride surface, air and water can be effectively isolated, and the storage time of the metal hydride under normal temperature can be obviously improved, thus solving the storage and use stability problems of the metal hydride under natural conditions.

Description

technical field [0001] The invention relates to a method for stabilizing metal hydrides, which belongs to the technical field of materials. Background technique [0002] Hydrogen is the most ideal clean energy carrier in the 21st century, and it has significant advantages such as high gravimetric energy storage density, wide range of sources, recyclability and pollution-free. The application of hydrogen energy involves three technical links: preparation, storage, transportation, and use. At present, solid hydrogen storage has become the most promising hydrogen storage method due to its advantages in hydrogen storage density, operational safety, and cost. Metal hydrides are the earliest and most studied substances in solid hydrogen storage. [0003] The traditional storage method is to pass the metal hydride through the medium and the device to effectively isolate oxygen and water, such as CeH 2 Preserved in kerosene, and then isolated from air and water with a closed devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/34C06B27/00
Inventor 刘吉平毕晓露
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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