Hydrogen generation method

Inactive Publication Date: 2007-07-05
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] The invention was made in view of the prior-art problems, and a principal object of the invention is to provide a novel hydrogen generation method capable

Problems solved by technology

However, these methods are disadvantageous in that much energy is required to generate hydrogen, the amount of hydrogen generated is small relative to the amount of starting materials used, large-scale equipment is required, etc.
Due to such disadvantages, although these methods are applicable to the hydrogen generation in industrial scale or in laboratory scale, these methods are not suitable for use in supplying hydrogen to fuel cells for automobiles; portable fuel cells for cellular phones, personal computers, etc. and like fue

Method used

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Examples

Experimental program
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Effect test

example 1

[0081]4.0 mg of platinum oxide (PtO2) powder was placed in a 30 ml two-necked flask. A gas burette was connected to one neck and a 50 ml dropping funnel with pressure-equalizing arm was connected to the other neck. 15 ml of aqueous solution in which 50 mg of ammonia borane (NH3BH3, 90% purity) was dissolved was placed in the dropping funnel.

[0082] The inside of the system was evacuated with a vacuum pump, and then filled with argon gas. The aqueous ammonia borane solution was introduced from the dropping funnel into the two-necked flask, and stirring was conducted at room temperature. One minute after stirring was started, it was observed that 39 ml of gas had been released; two minutes after, 65 ml; 5 minutes after, 87 ml; 10 minutes after, 105 ml; and 30 minutes after, 107 ml.

[0083] Gas chromatographic (GC) and mass spectral (MS) analyses showed that the gas released was hydrogen. The amount of hydrogen released was 3 moles per mole of ammonia borane (NH3BH3) as a starting mater...

example 2

[0085]4.0 mg of platinum (Pt) powder was placed in a 30 ml two-necked flask. A gas burette was connected to one neck and a 50 ml dropping funnel with pressure-equalizing arm was connected to the other neck. 15 ml of aqueous solution in which 50 mg of ammonia borane (NH3BH3, 90% purity) was dissolved was placed in the dropping funnel.

[0086] The inside of the system was evacuated with a vacuum pump, and then filled with argon gas. The aqueous ammonia borane solution was introduced from the dropping funnel into the two-necked flask, and stirring was conducted at room temperature. One minute after stirring was started, it was observed that 12.5 ml of gas had been released; two minutes after, 23.5 ml; 5 minutes after, 53.5 ml; 10 minutes after, 97.5 ml; and 30 minutes after, 105 ml.

[0087] Gas chromatographic (GC) and mass spectral (MS) analyses showed that the released gas was hydrogen. The amount of hydrogen released was 3 moles per mole of ammonia borane (NH3BH3) as a starting materi...

example 3

[0089] After the reaction of Example 2 was complete, platinum (Pt) powder was collected by filtration and placed in a 30 ml two-necked flask. A gas burette was connected to one neck and a 50 ml dropping funnel with pressure-equalizing arm was connected to the other neck. 15 ml of aqueous solution in which 50 mg of ammonia borane (NH3BH3, 90% purity) was dissolved was placed in the dropping funnel.

[0090] The inside of the system was evacuated with a vacuum pump, and then filled with argon gas. The aqueous ammonia borane solution was introduced from the dropping funnel into the two-necked flask, and stirring was conducted at room temperature. One minute after stirring was started, it was observed that 11 ml of gas had been released; two minutes after, 22 ml; 5 minutes after, 51 ml; 10 minutes after, 97 ml; and 30 minutes after, 105 ml.

[0091] Gas chromatographic (GC) and mass spectral (MS) analyses showed that the released gas was hydrogen. The amount of hydrogen released was 3 moles...

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Abstract

The invention provides a hydrogen generation method comprising the step of bringing, in the presence of water, ammonia borane represented by the chemical formula: NH3BH3 into contact with (1) a catalyst comprising as an active ingredient at least one member selected from the group consisting of metal catalysts and metal compound catalysts; (2) a solid acid; or (3) carbon dioxide. The method of the invention can generate hydrogen gas for use as fuel for fuel cells, etc., under controllable conditions without heating a starting material at high-temperature, and moreover can efficiently generate hydrogen gas at low cost.

Description

BACKGROUND OF THE INVENTION [0001] (1) Field of the Invention [0002] The present invention relates to a hydrogen generation method. [0003] (2) Description of the Related Art [0004] Various methods for generating hydrogen gas are currently known, and specific examples thereof include the electrolysis of water; the reaction between metal and acid; the reaction of water with metal hydride; the reformation of methyl alcohol or natural gas with steam; the release of hydrogen from hydrogen storage materials, such as hydrogen storage metal alloys, activated carbon, carbon nanotubes and lithium-nitrides, etc. However, these methods are disadvantageous in that much energy is required to generate hydrogen, the amount of hydrogen generated is small relative to the amount of starting materials used, large-scale equipment is required, etc. Due to such disadvantages, although these methods are applicable to the hydrogen generation in industrial scale or in laboratory scale, these methods are not ...

Claims

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Application Information

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IPC IPC(8): C10J3/46
CPCY02E60/362C01B3/065Y02E60/36
Inventor XU, QIANGCHANDRA, MANISH
Owner NAT INST OF ADVANCED IND SCI & TECH
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