JP2003088756A - Dehydrogenation catalyst and production method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for improving the efficiency of taking hydrogen out a hydride. SOLUTION: An activated carbon fiber put in a basket 22 and a platinum solution (platinum acetylacetonate dissolved in an auxiliary solvent) are stored in a pressure resistant container 20. In such a state, carbon dioxide is supplied by pressure while the pressure resistant container 20 being heated to make carbon dioxide be a supercritical fluid in the pressure resistant container 20. Consequently, the platinum compound is dissolved and diffused in the supercritical carbon dioxide and penetrates the insides of fine pores of the activated carbon fiber. The activated carbon fiber obtained in such a manner is dried and fired to produce the dehydrogenation catalyst.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hydrogen compound dehydrogenation catalyst for promoting a reaction for dehydrogenating a hydrogen compound and a method for producing the same.

[0002]

2. Description of the Related Art As one of the methods for producing hydrogen, decalin is irradiated with light in the presence of a complex of a transition metal such as cobalt,
A method for releasing hydrogen from decalin is known (for example, JP-A-3-9091). Decalin has a large hydrogen content per weight among hydrogen compounds, and there is a possibility that more hydrogen can be extracted from a constant weight.

[0003]

A fuel cell system is one of the systems utilizing hydrogen. Known methods of obtaining hydrogen to be supplied to a fuel cell include a method of storing hydrogen in a hydrogen cylinder and a method of storing hydrogen by storing it in a hydrogen storage alloy. The technique of extracting hydrogen from a hydrogen compound such as decalin is expected as a method capable of storing hydrogen at a higher density. When storing hydrogen by such a method, it is desired to efficiently generate hydrogen according to the demand of a hydrogen consuming device such as a fuel cell, but conventionally, a hydrogen compound which sufficiently satisfies such a demand. No dehydrogenation catalyst was known.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a technique for improving the efficiency of extracting hydrogen from a hydrogen compound.

[0005]

Means for Solving the Problem and Its Action / Effect To achieve the above object, the present invention provides a method for producing a dehydrogenation catalyst for promoting a dehydrogenation reaction in a hydrogen compound, comprising: A step of preparing a body, (b) a step of accommodating the porous body, a predetermined fluid, and a metal compound serving as an active species in a predetermined pressure-resistant container, and (c) an inside of the pressure-resistant container. And a step of dissolving the metal compound in the supercritical fluid by applying a temperature and a pressure at which the predetermined fluid becomes a supercritical fluid.

According to such a method for producing a hydrogen compound dehydrogenation catalyst, the metal compound is dissolved in the supercritical fluid, enters the pores of the porous body, and is deposited on the surface of the pores of the porous body. It is dispersed and carried. When the metal compound is dissolved and dispersed in the supercritical fluid, the metal that becomes the active species supported on the porous body becomes finer particles than when the metal is supported in the state of being dissolved in the liquid. be able to. Therefore, it becomes possible to further increase the total surface area of the metal supported on the porous body. Since the total surface area of the metal becomes larger, the number of sites contributing to the dehydrogenation reaction increases, so that a dehydrogenation catalyst having higher catalytic activity can be obtained. That is, by using the dehydrogenation catalyst produced by the method for producing a hydrogen compound dehydrogenation catalyst of the present invention, the efficiency of the dehydrogenation reaction can be further improved and the rate of the dehydrogenation reaction can be further increased.

In the method for producing a hydrogen compound dehydrogenation catalyst of the present invention, the porous body may be selected from activated carbon, carbon nanotubes, carbon nanofibers and zeolite. By using a porous body having a larger surface area, more metal can be supported and the catalytic activity can be improved. In order to secure the catalytic activity, it is necessary to support a sufficient amount of metal as the active species on the carrier, but if the supported amount is increased too much,
There is a risk that the metal particles become large and the catalytic activity is impaired. However, as described above, by using a porous body having a larger surface area as a carrier, a larger amount of metal can be supported without causing a decrease in catalytic activity.

In the method for producing a hydrogen compound dehydrogenation catalyst of the present invention, the predetermined fluid may be carbon dioxide.

Further, in the method for producing a hydrogen compound dehydrogenation catalyst of the present invention, the metal as the active species may contain a noble metal.

In the method for producing a hydrogen compound dehydrogenation catalyst of the present invention, in the step (b), a metal compound dissolved in a predetermined organic solvent may be used as the metal compound.

In the method for producing a hydrogen compound dehydrogenation catalyst of the present invention, after the step (c), further,
(D) 15 in nitrogen gas or inert gas
A step of performing heat treatment in a temperature range of 0 ° C. to 400 ° C. may be provided.

By carrying out the heat treatment at such a temperature, in the above metal compound supported on the porous body,
It is possible to efficiently remove components other than the metal that is the catalyst species. Further, if the heat treatment is carried out within the above temperature range, there is no possibility of damaging the porous body.

In the method for producing a hydrogen compound dehydrogenation catalyst of the present invention, the hydrogen compound may be decalin.

The present invention can be implemented in various forms other than the above, and in addition to a hydrogen compound dehydrogenation catalyst, for example, a hydrogen generator equipped with a hydrogen compound dehydrogenation catalyst, and a fuel equipped with such a hydrogen generator. It can be realized in the form of a battery system or a hydrogen generation method.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a process diagram showing a method for producing a dehydrogenation catalyst according to an embodiment of the present invention. In the present embodiment, first, a porous body and a compound of a metal serving as an active species are housed in a predetermined pressure resistant container (step S100). Here, the porous body is used as a carrier for supporting the active species, and the present production method is a method for supporting a metal compound serving as the active species on the porous body.

As the porous material, activated carbon fiber, carbon nanotube, carbon nanofiber, zeolite or the like can be used. In particular, when a porous material made of a carbon material is used, the carbon material exhibits strong hydrophobicity and has a strong affinity with an organic solvent. It is desirable because the seeds adhere efficiently to the surface of the carrier.

Platinum (Pt) is used as the active species metal.
Alternatively, a noble metal such as palladium (Pd) or silver (Ag) can be used. Alternatively, as long as it contains at least a noble metal, a plurality of kinds of metals may be supported on the porous body. In the case of supporting plural kinds of metals, for example, platinum-molybdenum (Pt-Mo) or platinum-
Rhenium (Pt-Re) can be used.

The metal compound contained in the pressure vessel in step S100 may be selected from the above-mentioned metal compounds serving as active species, which can be dissolved in a sufficient amount in the organic solvent. For example, when platinum is used as the metal supported on the porous body, platinum acetylacetonate, platinum chloride (PtCl ₄ ), platinum-2,4,6,8-tetramethyl-
2,4,6,8-Tetravinsyl cyclotetrasiloxylan or platinum-tetramethyldisiloxylan (O
_{[Si (CH 3) 2 CH} = CH 2] 2 Pt) or the like can be used. When using other kinds of metals as active species,
Similarly, the present invention can be applied by using those compounds that can be dissolved in a sufficient amount in an organic solvent. In the case of supporting a plurality of kinds of metals, the compounds of both metals capable of dissolving a sufficient amount in an organic solvent may be mixed in advance in a predetermined ratio.

Next, a predetermined fluid is supplied into the heat-resistant container, and the inside of the heat-resistant container is brought into a condition in which the predetermined fluid becomes a supercritical fluid (step S110). Here, the supercritical fluid will be described. For example, carbon dioxide is a gas at room temperature and atmospheric pressure, but when the pressure is increased with the temperature kept constant, it changes to a liquid when the pressure exceeds a predetermined pressure. The higher the temperature, the higher the liquefaction pressure.
However, above a predetermined condition (critical point), the above liquefaction will not occur. A state that exceeds the conditions (critical temperature and critical pressure) at the critical point is called a supercritical state, and a fluid in such a state is called a supercritical fluid. As the predetermined fluid that can be used in the supercritical fluid state, water or methanol can be used in addition to carbon dioxide.

The supercritical fluid is a fluid having a property different from that of a normal gas and a liquid, and is similar to a gas having high diffusivity and similar to a liquid capable of dissolving various substances. It has the nature and. Therefore, the supercritical fluid can be used as an organic solvent. In step S110, when a predetermined fluid is made into a supercritical fluid in the pressure vessel, the metal compound dissolves in this supercritical fluid. Further, the supercritical fluid diffuses into the pressure resistant container in a state in which the metal compound is dissolved. By diffusing in this way, the supercritical fluid enters the pores of the porous body. Among the above-mentioned fluids that can be used as a predetermined fluid, carbon dioxide has mild conditions for becoming a supercritical fluid (low critical temperature and critical pressure), low reactivity with other molecules, and toxicity. Is also low, which is desirable.

After step S110, when the pressure vessel is returned to room temperature and pressure, the porous body is filtered (step S120). When the pressure vessel is returned to room temperature and pressure, the supercritical fluid and the metal compound dissolved therein return to the initial state. In the filtration step of step S120, the excess components existing in the liquid state are roughly removed from the porous body.

Next, the porous body is dried (step S
130) and firing (step S140). By performing these steps, from the surface of the porous body,
Components other than the metal that becomes the active species are removed, and a catalyst in which the above metal is highly dispersed and supported in the pores of the porous body is obtained.
The drying step may be performed as necessary in order to remove the combustible substance prior to the firing step, when the combustible substance is used in the steps S100 to S110. Good. In addition, the firing step is preferably performed in a nitrogen atmosphere or an inert gas atmosphere in order to prevent the porous body that is the carrier from burning. Further, in the firing step, if the firing temperature is high, the porous body may burn, or the metal carried on the porous body may become large. Therefore, it is desirable that the firing step be performed at a temperature at which such a problem does not occur, for example, 150 ° C to 400 ° C.
It is desirable to do in.

Various compounds can be selected as the hydrogen compound (compound containing hydrogen) to be subjected to the dehydrogenation reaction using the dehydrogenation catalyst thus produced. For example, decalin, methylcyclohexane, propyl alcohol, cyclohexane and the like can be favorably used.

As another embodiment of the present invention, a hydrogen generator in which the dehydrogenation catalyst produced by the above method is housed can be used. For example, when the reaction of dehydrating a liquid hydrogen compound such as decalin at room temperature and pressure is carried out, it is desirable that the surface of the catalyst supporting the metal as the active species be wet with the hydrogen compound. If the surface of the active species is covered with a liquid, hydrogen generated by the dehydrogenation reaction becomes difficult to desorb from the catalyst surface,
The reaction is inhibited. However, when the hydrogen compound is completely in a gas state, the supply rate of the hydrogen compound is insufficient as compared with the dehydrogenation reaction rate. By making the surface of the catalyst wet and allowing the liquid hydrogen compound to exist on the surface of the catalyst to the extent that the elimination of the reaction products is not hindered,
A sufficient amount of hydrogen compound can be subjected to the dehydrogenation reaction,
The reaction efficiency can be increased. By using the dehydrogenation catalyst of the present invention and controlling the supply amount of the hydrogen compound so that the catalyst surface is in the wet state as described above, the hydrogen generation efficiency in the hydrogen generator can be increased.

As another embodiment of the present invention, a fuel cell system including a hydrogen generator containing the dehydrogenation catalyst of the present invention therein can be provided. Here, the hydrogen generated by the hydrogen generator is supplied to the fuel cell as fuel gas. By utilizing the hydrogen generator including the dehydrogenation catalyst of the present invention, which has a high rate of converting a hydrogen compound into hydrogen, a desired amount of hydrogen is rapidly generated according to the load fluctuation of the fuel cell and supplied to the fuel cell. It becomes possible.

[0026]

EXAMPLES A. Manufacturing process: The manufacturing method of the decalin dehydrogenation catalyst which is an example of the present invention is shown below. The decalin dehydrogenation catalyst of the examples used activated carbon fiber as a carrier and platinum as a metal that was an active species.

When manufacturing the dehydrogenation catalyst of the example, the pressure vessel 20 shown in FIG. 2 was used. Step S10 of FIG.
At 0, activated carbon fibers and platinum acetylacetonate, which is a platinum compound, were housed in the pressure vessel 20. The activated carbon fiber was further housed in a stainless steel basket 22 in the pressure resistant container 20. Further, the platinum acetylacetonate was contained in the pressure resistant container 20 in a state of a solution (platinum solution) in which a powdery one was dissolved in acetone (or ethanol) which is a cosolvent. In this example,
CH900- manufactured by Kuraray Chemical Co., Ltd. as activated carbon fiber
25 (trade name) was used. Further, in the pressure resistant container 20,
5 g of activated carbon fiber, 2 g of platinum acetylacetonate,
50 ml of acetone was stored.

After that, in step S110, carbon dioxide is supplied into the pressure resistant container 20 so as to
It was kept for 1 to 2 hours under the condition that carbon dioxide became a supercritical fluid. That is, while heating the inside of the pressure resistant container 20 to 150 ° C., carbon dioxide was pressurized and supplied so that the internal pressure of the pressure resistant container 20 became 30 MPa.

The critical temperature of carbon dioxide is lower than the conditions adopted in step S110. Here, the temperature of the platinum acetylacetonate was raised to the above temperature so that the powder of platinum acetylacetonate could be sufficiently dissolved in the auxiliary solvent, and the conditions for converting carbon dioxide into a supercritical fluid were set.

After the above steps, when the pressure vessel 20 is brought to normal temperature and pressure, carbon dioxide returns to gas and the platinum compound returns to a solution state. At this time, the activated carbon fiber in which the platinum compound has entered the pores is in a wet state in which the solution is attached. Therefore, in the filtration step in step S120, excess water is removed by filtering such activated carbon fibers.

The drying process in step S130 is as follows.
It was carried out at 120 ° C. for 6 hours. Further, the firing process in step S140 was performed in nitrogen at 300 ° C. for 1 hour to complete the dehydrogenation catalyst of the example.

B. Analysis of catalyst: FIG. 3 is an explanatory diagram showing the results of examining the state of the surface of the activated carbon fiber at various stages of the production process of the decalin dehydrogenation catalyst of this example. Here, platinum was detected on the surface of each platinum-supporting activated carbon fiber using an X-ray diffractometer (XRD). In the figure, the graphs (1) to (4) represent the results of analysis of the following samples. (1) Untreated: Platinum-supported activated carbon fiber that has finished the drying step in step S130 shown in FIG. (2) After transfer: Platinum-supported activated carbon fiber that has finished the filtration step in step S120. (3) 300 ° C. treatment: Platinum-supported activated carbon fiber that has finished the firing process in step S140. The dehydrogenation catalyst of this example. (4) 600 ° C. treatment: Platinum-supporting activated carbon fiber that has been subjected to the firing step of step S140 at a firing temperature of 600 ° C.

As shown in FIG. 3, no platinum peak was detected in the samples (1) and (2). From this result, it is considered that platinum was supported on the activated carbon fiber in the state of fine particles whose peaks could not be detected by XRD by supporting using supercritical carbon dioxide. Regarding the samples of (3) and (4) that have been subjected to the firing step, the peak of platinum is detected, but the sample (4) having a firing temperature of 600 ° C. is higher than the sample (3) having a firing temperature of 300 ° C. ), A larger peak was observed. Thus, by firing, the platinum particles on the activated carbon fiber become larger, and the particles become larger.
It was observed that the higher the firing temperature was, the more remarkable the phenomenon occurred.

FIG. 4 shows how the surface of each of the samples (2), (3) and (4) was observed using a scanning electron microscope (SEM). Regarding Samples (2) and (3), the shape of the activated carbon fiber as the carrier was observed without damage. On the other hand, in the sample (4), the shape of the activated carbon fiber was greatly changed. That is, it was observed that by firing at 600 ° C., a combustion reaction occurred in the activated carbon fiber and the activated carbon fiber was damaged.

C. Performance Evaluation of Catalyst: FIG. 5 is an explanatory diagram showing the results of comparing the performance of dehydrogenating decalin using the decalin dehydrogenation catalyst of this example and the catalyst of the comparative example. In addition to the example dehydrogenation catalyst. Comparative Examples 1 to 3 shown in the figure represent the following catalysts, and each graph shows the decalin conversion rate when each catalyst was used.

Example: Decalin dehydrogenation catalyst of this example.
The amount of platinum supported on the catalyst surface is 7% by weight. Comparative Example 1: A catalyst in which platinum is supported on an alumina carrier. The amount of platinum supported on the catalyst surface is 2% by weight. Comparative Example 2: A catalyst in which platinum is supported on an activated carbon fiber by using a water-soluble platinum solution. The amount of platinum supported on the catalyst surface is 1
weight%. Comparative Example 3: Activated carbon fiber used as a carrier in the above example.

Here, the amount of platinum supported will be described. The amount of platinum supported on the catalyst surface can be examined as the composition (the ratio of platinum element present) on the catalyst surface by energy dispersive X-ray analysis (EDX analysis). The above-mentioned platinum loading amount is a value (platinum loading ratio, weight%) obtained by performing EDX analysis on a plurality of minute regions on the surface of each catalyst for each catalyst and calculating an average value thereof.

When a catalyst is produced by using supercritical carbon dioxide as in the dehydrogenation catalyst of the embodiment, the amount of platinum compound contained in the pressure vessel 20 shown in FIG. The amount of platinum supported can be adjusted by adjusting the temperature and pressure of the fluid. With the dehydrogenation catalyst of this example produced under the conditions described above, the amount of platinum supported on the catalyst surface was the above value by EDX analysis.

The catalyst of Comparative Example 1 was produced by the well-known impregnation method. That is, a platinum nitrate solution, which is a water-soluble platinum solution, was used to immerse alumina pellets in the platinum solution, and the steps of drying and firing were carried out to support platinum on the alumina. When platinum is supported by such an impregnation method, the amount of platinum supported can be adjusted by adjusting the amount and concentration of the platinum solution in which the alumina pellets are immersed. In order to obtain a higher catalytic activity, it is necessary to support a larger amount of platinum (active species), but if the loading amount is excessive, the platinum particles on the carrier will become large and the catalytic activity will be suppressed. I will end up. Here, the amount of the platinum solution used for producing the catalyst of Comparative Example 1 and its amount were set in consideration of the amount of the supported catalyst that would give a higher catalytic activity in a preliminary experiment.
In the catalyst of Comparative Example 1 thus produced, the amount of platinum supported determined by EDX analysis was 2% by weight.

In the catalyst of Comparative Example 2, platinum was supported on the activated carbon fiber by using the water-soluble platinum nitrate solution by the same impregnation method as in the catalyst of Comparative Example 1. The catalyst of Comparative Example 2 is
The amount of platinum supported determined by EDX analysis was 1% by weight as described above. When using a carbonaceous material that is more hydrophobic than alumina as a carrier, using a platinum nitrate solution, which is a water-soluble platinum solution, makes it difficult for platinum compounds to stick to the carrier, and even if the platinum solution concentration is increased, platinum It is difficult to increase the supported amount of cesium over a certain amount. The above-mentioned value of 1% by weight of platinum supported can be said to be almost the maximum value when platinum is supported on the activated carbon fiber by the same method as in the catalyst of Comparative Example 1.

In each of the above-mentioned catalysts, platinum as the active species was supported on the activated carbon fiber as the carrier, but the activated carbon fiber used as the carrier has some activity as a decalin dehydrogenation catalyst. The catalyst of Comparative Example 3 is the same activated carbon fiber as that used as the carrier in the catalyst of the above Example and the catalyst of Comparative Example 2. For comparison, FIG. 5 also shows the results of measuring the activity of the activated carbon fiber itself used as the carrier.

Decalin (decahydronaphthalene, C_TenH
₁₈) Is charcoal having a form in which two cyclohexane rings are condensed.
Hydrogen halide, and hydrogen and naphthalene by dehydrogenation reaction
(C _TenH₈) And occur. In Figure 5, the dehydrogenation reaction is promoted.
The decalin conversion rate is used as a value that represents the catalytic activity
It was Decalin conversion rate is calculated by decalin dehydrogenation reaction.
Measure the amount of hydrogen produced and calculate the amount of decomposed decalin
And the amount of decomposed decalin relative to the total amount of supplied decalin
Was calculated as the ratio of.

When measuring the decalin conversion rate, 1 g of each catalyst was placed in a predetermined reactor, and the inside of the reactor was adjusted to 2 g.
Maintained at 10 ° C, 1 ml of decalin was sprayed onto each catalyst. The time of spraying decalin was set to 0 minutes, and the amount of hydrogen generated was measured. At the time of measurement, first, the gas generated in the reactor was taken out with time. Since naphthalene also exists as a gas at the temperature at which the dehydrogenation dehydrogenation reaction is carried out in this example, the gas taken out of the reactor contains both hydrogen and naphthalene. Then, the taken out gas was once cooled to remove the naphthalene in a liquid or solid state, and the amount of hydrogen generated was measured by measuring the flow rate of the remaining gas component. At each measurement, the integrated value of the amount of hydrogen generated up to that time was obtained, and the amount of decalin decomposed by each measurement and the decalin conversion rate at that measurement were calculated.

As shown in FIG. 5, the dehydrogenation catalysts of Examples showed extremely high decalin conversion rates as compared with the other catalysts. That is, among the other catalysts, the catalyst of Comparative Example 1, which has the highest decalin conversion rate, reaches a decalin conversion rate of only about 30%, whereas the catalyst of the Example has 60%.
A decalin conversion rate of over 1.0 was shown.

In addition, the dehydrogenation catalysts of the examples are not only high in the final conversion rate of decalin reached as compared with other catalysts, but also in the decalin conversion rate at the start of the reaction (decalin which increases per predetermined time). The conversion rate) was also higher than that of the other catalysts. Among the other catalysts, the catalyst of Comparative Example 1 exhibiting the highest decalin conversion has a decalin conversion rate of about 0.5% / min at the start of the reaction, whereas the dehydrogenation catalyst of this Example At the start of the reaction,
It exhibited a decalin conversion rate of over 3% / min.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a manufacturing process of a hydrogen compound dehydrogenation catalyst according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state of producing the dehydrogenation catalyst of the example.

FIG. 3 is an explanatory diagram showing the results of examining the state of the surface of the activated carbon fiber at various stages of the production process of the decalin dehydrogenation catalyst of the present example.

FIG. 4 shows images obtained by performing SEM analysis on platinum-supported activated carbon fibers.

FIG. 5 is an explanatory diagram showing the results of comparison of the dehydrogenation performance of decalin using the decalin dehydrogenation catalyst of the present example and the catalyst of the comparative example.

[Explanation of symbols]

20 ... Pressure resistant container 22 ... basket

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Claims (12)

[Claims] 1. A method for producing a dehydrogenation catalyst for accelerating a dehydrogenation reaction of a hydrogen compound, comprising: (a) preparing a porous body; and (b) providing the porous body in a predetermined pressure resistant container. And a step of accommodating a predetermined fluid and a compound of a metal serving as an active species, (c) the pressure-resistant container is heated to a temperature and a pressure at which the predetermined fluid becomes a supercritical fluid, And a step of dissolving the compound of claim 1 in the supercritical fluid. 2. The method for producing a hydrogen compound dehydrogenation catalyst according to claim 1, wherein the porous body is a hydrogen compound dehydrogenation catalyst selected from activated carbon, carbon nanotubes, carbon nanofibers, and zeolite. Production method. 3. The method for producing a hydrogen compound dehydrogenation catalyst according to claim 1, wherein the predetermined fluid is carbon dioxide. 4. The method for producing a hydrogen compound dehydrogenation catalyst according to claim 1, wherein the metal serving as the active species contains a noble metal. 5. The method for producing a hydrogen compound dehydrogenation catalyst according to claim 1, wherein in the step (b), a metal compound dissolved in a predetermined organic solvent is used as the metal compound. A method for producing a hydrogen compound dehydrogenation catalyst to be used. 6. The method for producing a hydrogen compound dehydrogenation catalyst according to claim 1, further comprising: (d) in a nitrogen gas or an inert gas, after the step (c), 150 A method for producing a hydrogen compound dehydrogenation catalyst, comprising a step of performing a heat treatment in a temperature range of ℃ to 400 ℃. 7. The method for producing a hydrogen compound dehydrogenation catalyst according to claim 1, wherein the hydrogen compound is decalin. 8. A dehydrogenation catalyst for accelerating a dehydrogenation reaction in a hydrogen compound, wherein a predetermined supercritical fluid in which a compound of a metal serving as an active species is dissolved is used to deposit the metal on a porous carrier. A hydrogen compound dehydrogenation catalyst carrying. 9. The hydrogen compound dehydrogenation catalyst according to claim 8, wherein the porous body is selected from activated carbon, carbon nanotubes, carbon nanofibers, and zeolite. 10. The hydrogen compound dehydrogenation catalyst according to claim 8 or 9, wherein the predetermined supercritical fluid is supercritical carbon dioxide. 11. The hydrogen compound dehydrogenation catalyst according to claim 8, wherein the metal contains a noble metal. 12. The hydrogen compound dehydrogenation catalyst according to claim 8, wherein the hydrogen compound is decalin.