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Indirect sodium borohydride-hydrazine mixed fuel cell

A sodium borohydride, fuel cell technology, applied in indirect fuel cells, fuel cells, solid electrolyte fuel cells, etc., to achieve the effect of improving hydrogen production, high energy density, and improving work efficiency

Inactive Publication Date: 2008-10-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of hydrazine as a hydrogen source for fuel cells is greatly limited, and it can only supply hydrogen for fuel cells below 10 watts

Method used

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  • Indirect sodium borohydride-hydrazine mixed fuel cell
  • Indirect sodium borohydride-hydrazine mixed fuel cell
  • Indirect sodium borohydride-hydrazine mixed fuel cell

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] There are three main methods for the preparation of tubular reactors, with Ni 3 Al and Co3 Al as a catalyst precursor material as an example:

[0031] method one:

[0032] Include the following steps:

[0033] (1) The catalyst precursor material Ni 3 Al and Co 3 Al powder is mixed according to the mass ratio of 0-100:100-0, filled into the metal support body, and sintered under the protection of vacuum or inert gas for 0.5-2 hours, then cooled to room temperature, and the sintering temperature is 550-700 °C; the catalyst precursor material The mass ratio to the metal support is 5-30:70;

[0034] (2) immerse the sintered metal support body in a sodium hydroxide or potassium hydroxide solution with a mass concentration of 5 to 20%, and carry out dealumination reaction at room temperature until bubbles no longer emerge. A metal nickel or metal cobalt catalytic layer with extremely strong catalytic activity is formed on the surface and inner surface;

[0035] (3) Fill...

Embodiment 1

[0056] Embodiment 1: Fuel cell system composed of proton exchange membrane fuel cell

[0057] The sodium borohydride-hydrazine mixed solution fuel cell system consists of a hydrogen generator, a proton exchange membrane fuel cell 3 and a blower 4 . The hydrogen generator consists of a fuel tank 1 , a tubular reactor 5 and a filter 6 . The fuel tank 1 is provided with a feed inlet, a waste discharge outlet and an outlet of the sodium borohydride-hydrazine mixed solution leading to the infusion pump 2 (such as figure 1 shown). The fuel tank 1 and the tubular reactor 5 are connected by an infusion pump 2 . The tubular reactor 5 is provided with an inlet of the sodium borohydride-hydrazine mixed solution from the fuel tank 1 and an outlet of the hydrogen generation product. An integrated porous catalyst is housed in the tubular reactor 5 . The speed of the hydrolysis reaction of the sodium borohydride-hydrazine mixed solution is controlled by controlling the fuel flow.

[005...

Embodiment 2

[0060] Example 2: Fuel cell system composed of alkaline fuel cell

[0061] The sodium borohydride-hydrazine mixed solution fuel cell system consists of a hydrogen generator, an anion exchange membrane fuel cell 23 and a blower 24 . The hydrogen generator consists of a fuel tank 21 , a tubular reactor 25 and a filter 26 . Same as embodiment 1, fuel tank 21 is provided with feed inlet, waste material discharge port and the sodium borohydride-hydrazine mixed solution outlet leading to infusion pump 22 (as figure 2 shown). The fuel tank 21 and the tubular reactor 25 are connected by an infusion pump 22 . The tubular reactor 25 is provided with an inlet of the sodium borohydride-hydrazine mixed solution from the fuel tank 21 and an outlet of the hydrogen generation product. The tubular reactor 25 is equipped with an integrated porous catalyst. The speed of the hydrolysis reaction of the sodium borohydride-hydrazine mixed solution is controlled by controlling the fuel flow.

...

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Abstract

The invention discloses a blended fuel cell, which is for the purpose of providing a direct-like sodium borohydride-hydrazine blended fuel cell. The blended fuel cell includes a fuel cell connected with an air blower, and a hydrogen generator comprising a fuel tank, a tubular reactor and a filter; wherein, the bottom outlet of the fuel tank connects with the transfer pump and the tubular reactor in sequence through pipelines, the outlet of the tubular reactor is connected with the filter arranged on the upside of the fuel tank, the air vent on the upside of the fuel tank is connected with the fuel cell through a hydrogen pipeline, the fuel in the fuel tank is a sodium borohydride-hydrazine-water solution. After the hydrazine is added, not only is the stability of the sodium borohydride improved, but also the energy density of the fuel can be enhanced, so that the producing of the hydrogen is easy, the energy density is higher, and the working efficiency of the fuel cell is improved.

Description

technical field [0001] The invention relates to a hybrid fuel cell, more specifically, the invention relates to an indirect sodium borohydride-hydrazine hybrid fuel cell. Background technique [0002] Sodium borohydride is a complex hydride with relatively high hydrogen content (hydrogen content 10.8 wt%), and is a white solid. Hydrazine is a higher hydrogen covalent hydride (12.5 wt% hydrogen). US Patent (US 6 358488) reports a method for generating hydrogen by catalyzing the hydrolysis of sodium borohydride using nickel, cobalt or hydrogen storage alloy powder. The reaction equation is as follows: [0003] NaBH 4 +2H 2 O→4H 2 +NaBO 2 [0004] Under normal temperature and pressure, sodium borohydride can undergo a hydrolysis reaction under the action of a catalyst to obtain pure hydrogen. Compared with other hydrogen storage methods, the hydrogen storage capacity of the fuel is high, which is 5 times that of conventional metal hydrides; in the reaction NaBH can be c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/20H01M8/06C01B3/04H01M8/10H01M8/14H01M8/00H01M8/1009
CPCY02E60/364Y02E60/521Y02E60/526Y02E60/528Y02E60/36Y02E60/50
Inventor 李洲鹏刘宾虹朱京科
Owner ZHEJIANG UNIV
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