JPH05137936A - Gas adsorbent and production thereof - Google Patents

Abstract

PURPOSE:To produce a gas adsorbent having a large surface area and high structural strength, hardly causing pressure drop and capable of efficiently adsorbing and desorbing gas. CONSTITUTION:Plastic thin sheets of a molecular sieve and elastic bags are alternately superposed and the molecular sieve is formed into a honeycomb shape by inflating the bags by pressurization to obtain a gas adsorbent 1. An electric resistance wire may be inserted into the honeycomb-shaped gas adsorbent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas adsorbent used in ventilation systems for high speed vehicles and aircraft, and a method for producing the same.

[0002]

2. Description of the Related Art A large amount of air is taken into an aircraft or high-speed vehicle for ventilation and air conditioning, and is exhausted to the outside. The intake and exhaust of a large amount of air increase the load on the air conditioner, resulting in the consumption of a large amount of energy.However, the carbon dioxide gas contained in the air inhaled by the occupants should be within the range permitted for human health. It was unavoidable because of the need to hold it down. However, if a device that removes carbon dioxide from the air becomes possible, the air conditioner can be made compact and energy-saving by recirculating and using the air in the passenger compartment.

As an apparatus for removing carbon dioxide gas, an adsorption type apparatus using an adsorbent of molecular sieve (synthetic zeolite) may be used. However, since the molecular sieve is fragile, the adsorbent is denoted by reference numeral in FIG. As shown in FIG. 7, there was only one that was processed into particles with a binder.

However, since this adsorption type carbon dioxide gas removing device has not been able to be miniaturized until now, it has not been realized for use in aircraft and vehicles.

[0005]

In order to achieve the miniaturization of the adsorption type carbon dioxide gas removing apparatus, it is necessary to efficiently adsorb and desorb carbon dioxide gas from the adsorbent. That is, it suffices that the surface area of the adsorption surface be large and that the thickness of the adsorbent be thin so that the heating and regeneration can be facilitated.

However, as described above, since the molecular sieve (synthetic zeolite) used as an adsorbent for carbon dioxide gas is brittle, it has only been processed into particles with a binder. Since this granular adsorbent acts as a resistance to the flow of the processing air when it is used in a container, a large amount of power is used in the air conditioning circulation system. In addition, it takes time to raise the temperature to the inside of the granular adsorbent during regeneration.

The present invention is intended to provide a gas adsorbent capable of solving the above problems and a method for producing the same.

[0008]

The present invention has taken the following means. (1) The gas adsorbent was composed of a honeycomb-shaped molecular sieve (synthetic zeolite). (2) The gas adsorbent was formed of a molecular sieve having a honeycomb shape and an electric resistance wire inserted therein. (3) After laminating the plastic molecular sieve thin plates and elastic bags alternately, the elastic bags are pressurized and inflated to make the molecular sieve into a honeycomb shape to produce a gas adsorbent. (4) An electric resistance wire is inserted into a thin plate of a plastic molecular sieve, the thin plates of the molecular sieve and elastic bags are alternately stacked, and then the elastic bag is inflated to expand the molecular sieve into a honeycomb. Form into a gas adsorbent.

[0009]

In the present invention of the above (1), the gas adsorbent can be made honeycomb-shaped and thin, and the surface area can be increased, the structural strength can be increased, and the pressure loss can be reduced.

In the present invention of (2) above, in addition to the function of the present invention of (1) above, the entire gas adsorbent is heated in a short time by the electric resistance wire, and desorption of the gas adsorbed by the adsorbent is achieved. It is done efficiently.

In the present invention of the above (3), the thin sheets of the molecular sieve in a plastic state are joined to each other by pressing and inflating an elastic bag alternately superposed with the thin sheets to form a honeycomb shape. In this way, the brittle molecular sieve can be used as a honeycomb-shaped gas adsorbent.

In addition to the function of the present invention of the above (3), in the above-mentioned (4) of the present invention, a honeycomb-shaped molecular sieve gas adsorbent having an electric resistance wire inserted therein is obtained. A gas adsorbent that is heated to a high temperature to efficiently desorb the adsorbed gas is obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A first embodiment of the present invention is shown in FIG. The carbon dioxide adsorbent 1 according to the present embodiment has a molecular sieve (synthetic zeolite) formed in a honeycomb shape.
In this embodiment, by forming the molecular sieve into a honeycomb shape, it is possible to obtain a gas adsorbent that is thin, has a small pressure loss, and has a large surface area and structural strength.

A second embodiment of the present invention is shown in FIG. In this embodiment, the high electric resistance wire 2 is inserted into the gas adsorbent 1 having a molecular sieve honeycomb shape in the first embodiment. In this embodiment, in addition to the action and effect of the first embodiment, by energizing the high electric resistance wire 2, the entire gas adsorbent 1 is heated in a short time and adsorbed by the gas adsorbent 1. The carbon dioxide gas can be efficiently desorbed to regenerate the adsorbent 1.

A third embodiment according to the manufacturing method of the present invention,
It is shown in FIGS. A molecular sieve (synthetic zeolite) and a binder are mixed to produce a flat, plastic thin adsorbent material 4.

Bag 3 that can be processed and inflated
Is folded as shown in FIG. 6, and the adsorbent material 4 and the bag 3 are alternately stacked. At this time, the bag 3 is shown in FIG.
Further, as shown in FIG. 4, the adsorbent materials 4 are laterally displaced by the thickness of the adsorbent material 4, and the adsorbent materials 4 vertically adjacent to each other are arranged in a zigzag pattern.

As shown in FIG. 5, the uppermost adsorbent material 4
The weight 6 is placed on the bag 3, the air pressure supply port 5 is connected to one end of each bag 3, and the compressed air is supplied from the air pressure port 5 into each bag 3. As a result, each bag 3 bulges, and as shown in FIG. 4, the adsorbent material 4 is bonded to each other and becomes the honeycomb-shaped molded body 1a.

Then, a negative pressure is applied to the bag 3 to reduce the pressure again, the bag 3 is taken out from the honeycomb-shaped molded body 1a, and the molded body 1a is heated to be a gas adsorbent. At this time, the position where the above-mentioned inflated bag 3 was present becomes one of the cells of the honeycomb.

As described above, according to the third embodiment, a honeycomb-shaped carbon dioxide gas adsorbent having a large surface area and structural strength and a small pressure loss can be manufactured by the fragile molecular sieve. ..

Although the bag 3 is inflated by the pressurized air in the third embodiment, the bag 3 may be mechanically inflated.

If the high electrical resistance wire 2 is inserted into the thin adsorbent material 4 in a plastic state before stacking with the bag 3,
The carbon dioxide adsorbent according to the second embodiment shown in FIG. 2 can be manufactured.

[0022]

As described above, according to the present invention,
It is possible to increase the adsorption surface area and structural strength of the molecular sieve adsorbent and reduce the pressure loss,
In addition to this, the entire adsorbent can be heated in a short time to efficiently desorb the gas adsorbed by the adsorbent to regenerate the adsorbent.

Further, according to the present invention, it is possible to easily manufacture a honeycomb-shaped gas adsorbent having a fragile molecular sieve or a honeycomb-shaped gas adsorbent in which electric resistance wires are incorporated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a carbon dioxide adsorbent according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a carbon dioxide adsorbent according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the adsorbent material and the bag according to the third embodiment of the present invention related to the manufacturing method are stacked.

FIG. 4 is a cross-sectional view showing a state in which the bag is inflated in the third embodiment.

FIG. 5 is a cross-sectional view showing a state in which an air pressure supply port is connected to the bag in the third embodiment.

FIG. 6 is a cross-sectional view of a bag used in the third embodiment.

FIG. 7 is an explanatory diagram of a conventional carbon dioxide gas adsorbent.

[Explanation of symbols]

 1 Gas Adsorbent 1a Molecular Sieve Molded Body 2 High Electric Resistance Wire 3 Bag 4 Adsorbent Material 5 Air Pressure Supply Port 6 Weight

Claims (4)

[Claims] 1. A gas adsorbent characterized by comprising a honeycomb-shaped molecular sieve. 2. A gas adsorbent characterized by comprising a molecular sieve having a honeycomb shape and having an electric resistance wire inserted therein. 3. A gas adsorption, characterized in that a thin plate of a molecular sieve in a plastic state and an elastic bag are alternately stacked, and then the elastic bag is pressurized and inflated to form the molecular sieve into a honeycomb shape. Method of manufacturing agent. 4. An electrical resistance wire is inserted into a thin plate of a molecular sieve in a plastic state, the thin plates of the molecular sieve and elastic bags are alternately laminated, and then the elastic bag is pressurized to inflate the molecular bag. A method for producing a gas adsorbent, characterized in that the sieve is formed into a honeycomb shape.