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Fuel blends for hydrogen generators

A technology of mixtures and borohydride compounds, which can be used in fuel, hydrogen production, liquid carbon-containing fuels, etc., and can solve the problem of hydrogen storage capacity reduction

Inactive Publication Date: 2007-02-21
MILLENNIUM CELL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limitation results in a corresponding reduction in hydrogen storage capacity, which is suboptimal where capacity is at a premium

Method used

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  • Fuel blends for hydrogen generators
  • Fuel blends for hydrogen generators
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] General method for hydrogen generation from fuel mixtures

[0036] Hydrogen generation experiments are generally described using sodium borohydride, decaborane, sodium hydroxide, and water in a fuel mixture as a sample system. Fuel mixtures were prepared under open air conditions. Water and stabilizing sodium hydroxide are initially mixed, to which decaborane is added, followed by the appropriate amount of sodium borohydride to achieve the desired ratio.

[0037] To catalyze the exhaust fuel mixture, a Parr reactor placed on a hot plate was used. The reactor is incorporated with two thermocouples that operate continuously during operation, one of which measures the temperature of the fuel solution and the other measures the temperature of the headspace near the top of the reactor. When the second thermocouple registered a threshold temperature of 95° C., the second thermocouple control started cycling through the cooling loop of the reactor. But the reality is that e...

Embodiment 2

[0040] 7.0% by weight hydrogen, + IC / B ratio = 0.8

[0041] Mix the following substances according to the method in Example 1 to obtain 100g capable of releasing 7.0% by weight H 2 A fuel mixture with a ratio of sodium to boron of 0.8: sodium borohydride 27.16 g; sodium hydroxide 3 g; decaborane (14) 3.34 g and water 66.5 g. According to reaction formula (1), every mole of sodium borohydride produces four moles of hydrogen.

[0042] (1)

[0043] According to reaction formula (2), every mole of decaborane (14) produces 22 moles of hydrogen.

[0044] (2)

[0045] generate H by calculation 2 and divide by the initial weight of the mixture to determine the hydrogen storage capacity of the mixture.

[0046] from NaBH 4 middle:

[0047] 27.16 g NaBH 4 ( 1 mol NaBH ...

Embodiment 3

[0063] 6.8% by weight hydrogen, + IC / B ratio = 0.25

[0064] Mix the following materials according to the method in Example 1 to obtain 100g capable of releasing 6.8% by weight H 2 Fuel mixture with a sodium to boron ratio of 0.25: sodium triborohydride 13.74 g; sodium dodecahydrododecaborate 13.74 g and water 76.09 g. According to reaction formula (3), every mole of sodium dodecahydrododecaborate produces 25 moles of hydrogen gas.

[0065] (3)

[0066] According to reaction formula (4), every mole of sodium triborohydride produces nine moles of hydrogen.

[0067] (4)

[0068] generate H by computing 2 and divide by the initial weight of the mixture to determine the hydrogen storage capacity of the mixture.

[0069] From Na 2 B 12 h 12 middle:

[0070] 10.17 g Na 2 B 12 H 12 ( ...

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Abstract

The present invention relates to improved aqueous fuels for hydrogen generators and a method for using them in the production of hydrogen. The present invention also relates to a system of using the subject aqueous fuels to generate hydrogen gas for use in a fuel cell or other device. The subject fuels contain a mixture of boron hydrides, at least one of which is a metal salt, including metal borohydrides, higher boranes and metal higher boron hydrides. The subject aqueous fuels contain a mixture of boron hydrides having a positive ionic charge (<+>IC) to boron ratio of between 0.2 and 0.4 or between 0.6 and 0.99. Preferred fuels contain a mixture of boron hydrides having an (<+>IC) to boron ratio between 0.2 and 0.3 or between 0.7 and 0.8. Mixtures containing a metal borohydride also contain a metal hydroxide to stability it against premature hydrolysis in the aqueous fuel media.

Description

field of invention [0001] This invention relates to borohydride salt mixtures for hydrogen generation. Background of the invention [0002] A number of borohydride compounds, also referred to herein as borohydrides, especially their metal salts, have been known for about fifty years for their use in hydrogen generation. It is also known that hydrogen generation is achieved by a hydrolysis process, generally acid- or metal-catalyzed, as Schlesinger et al. in " Sodium Borohydride: Its Hydrolysis and Its use as a Reducing Agent in the Generation of Hydrogen (Sodium borohydride: its hydrolysis and its use as a reducing agent in hydrogen gas generation)", J.Am.Chem.Soc., Vol 75, pp215-219, 1953 and G.W.Parshall in " Hydrogen Generation by Hydrolysis or Alcoholysis of a Polyhydropolyborate-Group VIII Metal Mixture (Hydrolysis or alcoholysis of hydrogen generation by polyhydropolyborate (Polyhydropolyborate)-Group VIII metal mixture)" as reported in U.S. P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C01B3/06
CPCY02E60/362C01B3/065Y02E60/36C10L1/32
Inventor M·T·凯利Y·吴J·C·布拉迪F·M·豪托恩
Owner MILLENNIUM CELL
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