JPS5812382Y2 - Catalyst for storage batteries - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a catalyst container for a storage battery, particularly in a catalyst container thereof.

Catalyst cells using a hydrogen gas-oxygen gas combination catalyst are already being used in storage batteries for equipment to reduce the frequency of water replenishment and to prevent the emission of acid mist and explosive gas.

However, conventional methods have a limited gas binding reaction rate, making it difficult to apply them to large-capacity storage batteries that generate a large amount of gas.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and to provide a catalyst that has a high rate of reaction for combining hydrogen gas and oxygen gas, and is applicable to large-capacity storage batteries.

The gist of the present invention for achieving this purpose is as follows.

That is, the hydrogen gas-oxygen gas combination catalyst is housed in a single narrow gap explosion-proof porous container having one or more vertically penetrating cavities.

Next, the present invention will be explained in detail using embodiments shown in the drawings.

In Fig. 1a and Fig. 1 showing an example of the present invention, 1 is a body, 2 is a lower part of the body and is attached to a storage battery;
3 is a hydrogen gas-oxygen gas combined catalyst, for example, a γ-alumina carrier with platinum or palladium attached; 4 is a catalyst container with a narrow gap explosion-proof function made of sintered inorganic particles;
The inside of the catalyst container is provided with, for example, one or more cylindrical cavities 8 that penetrate in the vertical direction, and if there is one cavity, the cavity is located in the center of the catalyst container, and if there are multiple cavities, the reaction is conducted evenly. Keep them evenly spaced.

Reference numeral 6 denotes a heat-resistant support base for installing the catalyst container in the space inside the cylinder, which is a molded product made of a material such as ebonite, and I represents an exhaust port provided at the upper part of the cylinder.

Incidentally, FIG. 2 shows an example of a conventional catalyst cylinder, and its structure is the same as that in FIG. 1, except that there is no cavity in the structure of the catalyst container 4.

The functions of this catalyst are as follows.

First, hydrogen gas and oxygen gas generated from the storage battery flow in from the lower part 2 of the cylindrical body, pass through the wall surface of the catalyst container 4, come into contact with the catalyst 3, and become water vapor through chemical bonding.

Next, this water vapor passes through the wall surface of the catalyst container 4 and moves to the outside, and is cooled and condensed on the inner wall surface of the cylindrical body 1.

The liquid water flows back into the storage battery from the lower part 2 of the cylindrical body.

In this way, the gas bonding reaction does not proceed until the gas passes through the wall of the catalyst container.

Table 1 shows the results of tests conducted on this reaction state by changing the shape of the catalyst container.

This test was carried out to determine the effect of the shape of the catalyst container on the reaction rate in which the catalyst container had the structure shown in FIG. 2 and the internal volume of the catalyst container was approximately 10 cc, and the same weight of catalyst was housed therein.

As is clear from Table 1, the reaction rate increases as the height of the catalyst storage chamber increases.

Therefore, by providing one or more cavities extending vertically inside the catalyst container, a catalyst cell with high reaction efficiency can be obtained.

In addition, in the embodiment of the present invention, when the gas generated from the storage battery exceeds a certain value, it passes through the cavity 8 and passes through the upper exhaust port I.
Since the generated gas is discharged to the outside in the state of unreacted gas, the gas passing through the catalyst container 4 can be restricted, and the temperature rise of the catalyst 3 can also be restricted, which is excellent in terms of safety. .

Furthermore, when a large amount of gas is generated from the storage battery and most of it reacts with the catalyst, the temperature rises significantly due to the heat of reaction, reaching approximately 350 degrees Celsius in the catalyst layer, causing sintering of the catalyst itself and reducing its activity. Not only that, but there is also the risk of burning out the catalytic converter or damaging the storage battery, and also requiring severe heat resistance for the material of each part of the catalytic converter. It turns out, but
In the embodiment of the present invention, as mentioned above, this does not occur.

As mentioned above, the present invention is designed to improve safety and longevity by storing the catalyst in a single catalyst container with one or more cavities in the center and installing it in a cylindrical body with a simple structure. A catalyst with high performance and high reaction rate has been produced, and its industrial value is great.

[Brief explanation of the drawing]

Fig. 1a is a longitudinal cross-sectional view showing an embodiment of the catalyst cell for storage batteries of the present invention, Fig. 1 is a cross-sectional view taken along the line A-A in Fig. 1a, and Fig. 2 is an example of a conventional catalyst cell. FIG. 1... whole body, 3... catalyst, 4...
...Catalyst container, 8...Cavity.

Claims (1)

[Scope of utility model registration request] One or more sintered inorganic particles in the space inside the cylinder, which has a path for introducing gas generated in the storage battery and reflux of condensed water below the cylinder, and an exhaust path for unreacted gas above. A catalyst cell for a storage battery has a structure in which a catalyst container containing a hydrogen gas-oxygen gas bonding catalyst is installed in a single porous container having a narrow-gap explosion-proof structure having several vertically penetrating cavities.