JP2007229672A - Gas reforming method, gas reforming net, gas reforming sheet, gas reforming piping, and fuel cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for efficiently reforming gas capable of improving the reaction efficiency of a gas. <P>SOLUTION: Gas is reformed by allowing the gas to pass through in the vicinity of a gas reforming surface prepared by coating the surface with ceramic particles by virtue of a binder disposed in a gas flow path. The ceramic particles are prepared by steps of forming an electrolyte comprising rutile titanium oxide as a main component by admixing the main component with an approximately equal amount of metal particles having a high ionization tendency, suitably electrolyzing the electrolyte in a solvent, adding necessary additives and a catalyst to a substance deposited and adhering onto the cathode, and calcining the substance with the additives and the catalyst added therein. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to gas modification using ceramics.

  Conventionally, in order to increase the combustion efficiency of an internal combustion engine such as a car, reforming of fuel and air has been performed using ceramics. Fuel and the like are reformed by far infrared rays emitted from ceramic, and as a result, effects such as improvement in fuel efficiency and reduction in NOx of exhaust gas can be obtained. For example, a method has been proposed in which a ceramic sheet is wound around an intake pipe of an internal combustion engine to reform the air in the intake pipe.

  However, the conventional method has a problem that a good effect is not necessarily obtained with respect to gas reforming. In addition, there are various types of ceramics. For liquid fuels, attempts have been made to reform the fuels using various ceramics. On the other hand, they are suitable for reforming gases such as air. Regarding ceramic, there has been a problem that it has not been clarified yet.

  The present invention has been made in view of the above problems, and an object thereof is to provide a technique suitable for air reforming.

  The above object is achieved by the following means.

  (1) A modified surface obtained by coating ceramic particles with a binder is disposed in a gas flow path, and the gas is modified by passing the gas in the vicinity of the modified surface. Gas reforming method.

  (2) A gas reforming method, wherein the gas passing through the transport pipe is reformed by applying ceramic particles to the inner wall of the transport pipe through which the gas flows.

  (3) A modified net configured by applying ceramic particles to a net-like net member is disposed in a gas flow path, and the gas passing through the modified net is modified. Gas reforming method.

  (4) The gas reforming method as described in (1), (2) or (3) above, wherein the gas is air.

  (5) The above (1), wherein the ceramic particles are obtained by electrolyzing a mixture of rutile titanium oxide particles and metal particles with a solvent and firing the material deposited on the cathode. The gas reforming method according to (2) or (3).

  (6) A gas reforming net comprising a net-like net member and ceramic particles fixed to the outer surface of the net member, and disposed in a gas flow path to reform the gas.

  (7) A gas reforming sheet comprising a sheet member and ceramic particles fixed to the surface of the sheet member, and disposed in a gas flow path to reform the gas.

  (8) A gas reforming pipe comprising a transport pipe for transporting gas and ceramic particles fixed to the inner wall of the transport pipe, and reforming the gas.

  (9) Provided with a pair of electrodes, an ion movement medium that is arranged between the pair of electrodes and moves ions, and a gas reforming pipe according to claim 8 that supplies hydrogen or oxygen to the electrodes. A fuel cell.

  According to the above means, the following operation can be obtained.

  In the above means, the ceramic particles are arranged in the vicinity of the gas, so that the reforming efficiency can be increased. Further, when a gas is allowed to flow through the transport pipe, it is possible to modify the gas without disturbing the flow. Further, when the gas reforming net is used, the gas passing through the net can be reformed while maintaining the gas flow as much as possible.

  In particular, the negative ion effect of the ceramic itself can be enhanced by using a material deposited on the cathode by electrolysis as the ceramic particles that act on the gas. Negative ions cannot penetrate the member, but by arranging them directly in the gas as in the present invention, the effect of the negative ions can be used for gas reforming.

  The ceramic particles are mainly composed of rutile titanium oxide particles, and an electrolyte formed by mixing the main material with metal particles having a large ionization tendency in the same amount as that in an appropriate solvent. It is desirable to obtain the material by decomposing and depositing and adhering to the cathode, and adding the necessary additives and catalyst, followed by firing. As a method for producing this ceramic, rutile titanium oxide and magnesium are mixed in a substantially equal weight ratio, and this is oxidized and reduced in a furnace to form an electrolyte, and this electrolyte is electrolyzed in a solvent as appropriate, and its cathode It is preferable to take out the substance deposited and deposited on the ceramic, mix a trace amount of catalyst and additives, and fire it into ceramics, and pulverize the fired product into fine particles. In particular, the mixture as a catalyst is palladium having a weight ratio of about 0.1%, the additive is preferably sodium hydroxide having a weight ratio of 5%, and the firing temperature is 1280 to 1380 ° C. The average particle size of pulverized is preferably about 2 to 10 μm.

  According to the present invention, it is possible to achieve an excellent effect that various efficiencies can be improved by modifying a gas.

  First, an example of a method for producing ceramics used in the present invention will be described. First, a rutile-based titanium oxide granular material is used as a main material, and a metal granular material having a large ionization tendency of approximately the same amount is mixed with the main material. Specifically, 500 g of rutile titanium oxide having an average particle size of about 150 μm and 500 g of magnesium having the same properties and the same weight ratio as this titanium are mixed and placed in a quartz crucible (furnace), and then redox. Process. In this oxidation-reduction treatment, both titanium oxide and magnesium are pulverized to a fine powder having an average particle size of about 3 μm at about 500 ° C. to 540 ° C. Therefore, the mixed fine powder of titanium oxide and magnesium is taken out from the crucible. The extracted fine powder becomes an electrolyte.

  The produced electrolyte is electrolyzed in a suitable solvent. For example, water is used as the solvent. A substance deposited and deposited on the cathode through this electrolysis is taken out, added with necessary additives and catalyst, and fired, and the fired product is pulverized into fine particles.

  Specifically, Cu and C are used for the electrode rod for electrolysis, and 12V DC is applied to the electrode for electrolysis. In an electrolytic solution in which a mixed powder body of oxidized and reduced titanium oxide and magnesium is dissolved as an electrolyte, ion transmission occurs due to energization in electrolysis, so that a positive charge flows from the anode toward the electrolytic solution. Further, in the anodic oxidation of the anode, an anode current flows on the anode surface, and in the cathode reduction of the cathode, a cathode current flows on the cathode surface. Therefore, positively charged ions (cations or cations) are attached to the anode, and negatively charged ions (anions or anions) are attached to the cathode (cathode). Accordingly, the titanium oxide deposited and deposited on the cathode has negatively charged ions, which are used as a material.

  About 0.1% by weight of palladium is mixed as a catalyst with respect to the amount of the raw material, and 5% by weight of caustic soda is added and stirred and kneaded. In order to fire this, it is molded into a suitable shape, and this molded body is fired in a heating furnace at about 1280 ° C. to 1380 ° C. for at least about 6 hours, at most about 12 hours, thereby obtaining a ceramic base material. Thereafter, the fired ceramic base material is pulverized and formed into ceramic powder particles having an average particle diameter of about 2 μm to 10 μm under heating. Thereby, a functional ceramic is obtained.

  Next, the gas reforming net 10, the gas reforming sheet 20, and the gas reforming pipe 30 using this ceramic will be described with reference to FIG. As shown in FIG. 1, in any gas reforming means, a binder solution 100 in which the ceramic obtained by the above process is dissolved in a binder is used. As this binder, various materials such as a room temperature curable binder resin, an ultraviolet curable binder resin, and OOXXX can be used. Here, XXX is used.

  In order to obtain the gas reforming net 10, first, the net-like net member 12 is put into the binder solution 100, and the binder solution 100 is applied around each strand of the net member 12. The net reforming net 10 is obtained by taking out the net member 12 and drying it. In the gas reforming net 10, as shown in an enlarged view in FIG. 2, ceramic particles 104 are fixed to the outer surface of the strands 14 by a binder 102, so that the outer surface itself is a gas reforming surface. 14A functions.

  As shown in FIG. 3, the gas reforming net 10 can be disposed in an air intake 180 that takes in air in an internal combustion engine such as an automobile or a motorcycle. Specifically, the gas reforming net 10 is curved and disposed along the outer peripheral surface of the cylindrical air filter 200. In this way, since the air taken in by the air filter 200 passes through the gas reforming net 10, the introduced air can be reformed, and a fuel efficiency improvement effect and a cleaner exhaust gas can be achieved. become. Further, the odor of exhaust gas emitted from the internal combustion engine is also reduced. Moreover, since this gas reforming net | network 10 utilizes the net-like net | network member 12 as a raw material, pressure loss can also be reduced. In addition, although the case where it installed in the cylindrical air filter 200 was shown here, this invention is not limited to it, It can utilize also for a planar type air filter. Further, the modified surface may be formed by coating the air filter itself with the binder solution 100.

  As shown in FIG. 4, the gas reforming net 10 can also be installed in a blower 304 for sending air to the oil burner 302 in the boiler device 300. In this case, the gas reforming net 10 may be installed at the air intake port of the blower 304. Further, as shown in FIG. 5, it can be installed in a fan heater 400 such as oil or gas. In this case, the gas reforming net 10 is arranged at the intake port of the fan 402 mounted on the back side. If it does in this way, while improving fuel efficiency, the odor of warm air can be reduced.

  Next, the gas reforming sheet 20 will be described with reference to FIG. In order to manufacture the gas modified sheet 20, first, two sheet members 22 are prepared, and the binder solution 100 is applied to each using the brush 24. In the present embodiment, paper is used as the sheet member 22. The two sheet members 22 are stacked so that the application surfaces face each other, and both are brought into close contact with each other and dried. As a result, the gas-modified sheet 20 in which the modified surface 22A is formed between the two sheet members 22 can be obtained. If the gas reforming sheet 20 is disposed in the gas flow path, the gas passes through the vicinity of the reforming surface 22A, and thus the gas can be reformed. Although the case where the modified surface 22A is sandwiched between the two sheet members 22 is shown here, the modified surface 22A may be formed by applying the modified surface 22A to the outer surface.

  Next, the gas reforming pipe 30 will be described with reference to FIG. First, the conveyance pipe 32 used for flowing gas is prepared, and this is put into the binder solution 100. In addition, although shown about the conveyance pipe | tube with a cross section circular or square here, the shape is not ask | required. Various materials such as metal, concrete, rubber, and resin can be used for the material of the transfer pipe 32. Thereafter, the transport pipe 32 is taken out from the binder solution 100 and dried. As a result, the gas reforming pipe 30 in which the reforming surface 32A is formed on the inner wall of the transfer pipe 32 can be obtained. The gas reforming pipe 30 does not hinder the flow of gas in the pipe. Further, since far infrared rays are emitted from the inner wall toward the center, the gas reforming efficiency can be further enhanced.

  FIG. 8 shows a gas stove 500 using the gas reforming pipe 30. In the gas stove 500, the gas reforming pipe 30 is used as a gas pipe for a rubber material for supplying gas. In this way, since the reformed gas is supplied to the gas stove 500, the combustion efficiency is improved and the odor can be reduced.

  FIG. 9 shows a fuel cell 600 using this reforming pipe 50. The fuel cell 600 includes, for example, an aqueous sodium hydroxide solution 602, two electrodes 604 and 604 disposed in the sodium hydroxide solution 602, a hydrogen supply case 606 that covers one electrode 604, and the other electrode 604. An oxygen supply case 608 is provided. Further, gas reforming pipes 30 for supplying the respective gases are arranged in the hydrogen supply case 606 and the oxygen supply case 608, respectively. Therefore, since each of hydrogen and oxygen passes through the gas reforming pipe 30 and is provided to the supply cases 606 and 608, each gas is reformed, and the conversion efficiency of electricity can be increased.

  As described above, in the present embodiment, since the modified surface obtained by applying and fixing the ceramic particles 104 with the binder 102 is disposed in the gas flow path, the gas passing through the vicinity can be modified. It becomes possible. In addition, since the ceramic particles 104 can directly contact the gas, it is possible to increase the reforming efficiency as compared with the case of indirectly modifying. In particular, since the ceramic particles 104 are manufactured using a material deposited on the cathode by electrolysis, the ceramic particles 104 have a large amount of anions. As a result, the negative ion effect of the ceramic particles 104 itself can be enhanced. Negative ions cannot penetrate through a carrier pipe made of metal or the like, but can be directly applied to the gas by being arranged directly in the gas as in this embodiment. Note that, here, only the case where the modified surface is formed on the net-like member or the pipe is shown, but the present invention is not limited to this. For example, the modified surface is formed by applying ceramic particles to the honeycomb structure member. It can also be used as a reforming filter.

  [Example]

  Using the boiler device 300 shown in FIG. 4, the difference in temperature increase rate was compared between when the gas reforming net 10 was attached and when it was not attached. Specifically, using a boiler manufactured by Showa Iron Works Co., Ltd. (SNW-2003A flooding capacity 260L 200000 kcal / h) as the boiler device 300, the gas reforming net 10 having a size of 450 mm × 450 mm is appropriately installed at the air intake port. The time required for starting from 75 degrees and rising to 82 degrees was measured. The result is shown in FIG. As is apparent from the figure, it was found that when the gas reforming net 10 is attached, the time can be shortened by about 20% compared to the case where the gas reforming net 10 is not attached. This means that the combustion efficiency of the boiler device 300 is increasing.

  Next, using the fan heater 400 shown in FIG. 5, the HC (hydrocarbon) concentration of the blown gas when the gas reforming net 10 was attached and when it was not attached was measured twice. Using XXXXX (OVF-G30A / model number 004001475) as the fan heater 400, after setting the warm air to “strong”, “digestion” is performed, and the wind generated during digestion is collected to reduce the HC concentration. It was made to measure. The result is shown in FIG. As is apparent from the figure, it has been clarified that the HC concentration when the gas reforming net 10 is attached is reduced by about 30% to 60% as compared to when the gas reforming net 10 is not attached.

  Moreover, under the same conditions, the odor of the blown gas when the gas reforming net 10 was installed and when it was not installed was measured using a simple odor sensor. The result is shown in FIG. As is clear from the results, it was revealed that the odor when the gas reforming net 10 was attached was reduced compared to when the gas reforming net 10 was not attached.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  According to the gas reforming method and the like of the present invention, the gas can be effectively reformed, and therefore, it can be used for various applications such as a fuel cell, an internal combustion engine, and a boiler.

The flowchart which shows the manufacturing process of the gas reforming net which concerns on embodiment of this invention. Sectional drawing which expands and shows the state of the wire cross section of the gas reforming net Assembly drawing showing the case where the same gas reforming net is used for air intake Front view showing the case where the gas reforming net is used in a boiler device Front and rear views showing the case where the gas reforming net is used for a fan heater The flowchart which shows the manufacturing process of the gas modification sheet | seat which concerns on embodiment of this invention. The flowchart which shows the manufacturing process of the gas reforming piping which concerns on embodiment of this invention. Perspective view when the gas reforming pipe is used as a gas stove Schematic diagram schematically showing the case where the gas reforming pipe is used in a fuel cell Table showing the effect of improving the combustion efficiency of boiler equipment through experiments Table showing the improvement effect of fan heater HC concentration by experiment Table showing the effect of fan heater odor improvement by experiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Gas reforming net 20 Gas reforming sheet 30 Gas reforming piping 180 Air intake 300 Boiler device 400 Fan heater 500 Gas stove 600 Fuel cell

Claims (9)

  In the gas flow path, a modified surface obtained by applying ceramic particles with a binder is disposed, and the gas is reformed by passing the gas in the vicinity of the modified surface. Quality method.   A gas reforming method, wherein the gas passing through the transport pipe is reformed by applying ceramic particles to the inner wall of the transport pipe through which the gas flows.   In the gas flow path, a modified net constituted by applying ceramic particles to a net-like net member is disposed, and the gas reforming is performed by modifying the gas passing through the modified net. Quality method.   The gas reforming method according to claim 1, wherein the gas is air.   4. The ceramic particles are obtained by electrolyzing a mixture of rutile titanium oxide particles and metal particles with a solvent and firing a substance deposited on the cathode. Gas reforming method.   A gas reforming net comprising a net-like net member and ceramic particles fixed to an outer surface of the net member, and disposed in a gas flow path to reform the gas.   A gas reforming sheet comprising a sheet member and ceramic particles fixed to the surface of the sheet member, and disposed in a gas flow path to reform the gas.   A gas reforming pipe comprising a transport pipe for transporting gas and ceramic particles fixed to an inner wall of the transport pipe, and reforming the gas.   A gas reforming pipe according to claim 8, comprising: a pair of electrodes; an ion movement medium that is arranged between the pair of electrodes to move ions; and hydrogen or oxygen is supplied to the electrodes. Fuel cell.

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