JP6399816B2 - Highly dispersed transition metal catalyst and method for highly dispersed loading of transition metal atoms on the surface of a silica support - Google Patents
Highly dispersed transition metal catalyst and method for highly dispersed loading of transition metal atoms on the surface of a silica support Download PDFInfo
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本発明は、遷移金属をシリカ担体に担持させた触媒に関し、より詳しくは、触媒活性金属原子である遷移金属原子をシリカ表面に化学結合させ、遷移金属原子を原子レベルでシリカ表面に高分散担持させた高分散遷移金属触媒等に関する。 The present invention relates to a catalyst in which a transition metal is supported on a silica support. More specifically, the transition metal atom, which is a catalytically active metal atom, is chemically bonded to the silica surface, and the transition metal atom is supported on the silica surface in a highly dispersed manner at the atomic level. The present invention relates to a highly dispersed transition metal catalyst.
遷移金属が高い触媒能力を持つことはよく知られている。しかし、その金属原子同士が凝集して大きな集合体になってしまうと、触媒反応に関与する原子の数が見かけ上減ってしまい、せっかくの触媒能力を十分に発揮させることができない。 It is well known that transition metals have a high catalytic capacity. However, when the metal atoms aggregate to form a large aggregate, the number of atoms involved in the catalytic reaction is apparently reduced, and the catalytic ability cannot be fully exhibited.
一方、遷移金属粒子を原子レベルで担体に分散担持させることができれば、それぞれの原子が反応に関与できることになり、その触媒としての能力を飛躍的に上げることができる。 On the other hand, if the transition metal particles can be dispersed and supported on the support at the atomic level, each atom can participate in the reaction, and its ability as a catalyst can be dramatically increased.
従来、触媒を製造するには、特許文献１の段落０００４に示すように、種々の方法が知られている。遷移金属を担持する方法（従来担持法）としては、含浸法、粉末添加法、共沈法などが用いられている（図４）。しかし、それらの方法では、遷移金属原子を担体表面に原子レベルで分散させることができず、触媒としての性能を十分に発揮させることができない。 Conventionally, as shown in paragraph 0004 of Patent Document 1, various methods are known for producing a catalyst. As a method for supporting a transition metal (conventional supporting method), an impregnation method, a powder addition method, a coprecipitation method, and the like are used (FIG. 4). However, in these methods, the transition metal atom cannot be dispersed on the support surface at the atomic level, and the performance as a catalyst cannot be sufficiently exhibited.
そこで、ニッケル等、高い触媒能力を持つ遷移金属を、担体表面に原子レベルで分散する方法の開発が期待されている。図５の（Ａ）に示すように、固体表面（担体表面）に遷移金属（Ｍ）を原子レベルで高分散させた高分散遷移金属触媒であれば、高効率で反応物から生成物を生成できる。それには、図５（Ｂ）に示すように、（１）伝統的な触媒（遷移金属の集合体）、（２）担持触媒（遷移金属の集合体の分散）を超え、原子レベルで、担体表面に遷移金属を高分散させる新たな固定化方法の開発が必要である。 Therefore, development of a method for dispersing a transition metal having high catalytic ability such as nickel on the support surface at the atomic level is expected. As shown in FIG. 5 (A), a highly dispersed transition metal catalyst in which transition metal (M) is highly dispersed on the solid surface (support surface) at the atomic level produces products from the reactants with high efficiency. it can. As shown in FIG. 5 (B), (1) the traditional catalyst (aggregation of transition metal), (2) supported catalyst (dispersion of the aggregation of transition metal), and at the atomic level, the support Development of a new immobilization method that highly disperses transition metals on the surface is necessary.
ここで、廃棄物系バイオマスの高効率なガス化改質技術として、高分散遷移金属触媒を適用することで、バイオマスから再生可能利用エネルギーへの転換を容易にし、グリーンテクノロジーとして社会実装するための基礎技術が確立する。 Here, as a highly efficient gasification reforming technology for waste biomass, a highly dispersed transition metal catalyst is applied to facilitate the conversion from biomass to renewable energy, and to implement society as a green technology. Basic technology is established.
廃棄物系バイオマスに熱分解ガス化技術を適用すると、Ｈ２、ＣＯ、ＣＯ２などを含むガスが生成する。しかし、種々の副生成物が共存しているため、そのままでは当該生成ガスの利用価値はあまり高くない。そこで、高分散遷移金属触媒を用いれば、当該生成ガスから、高濃度Ｈ２、ＣＯが得られ、またはＣＨ４の生成をも可能にする。 When the pyrolysis gasification technology is applied to waste biomass, a gas containing H 2 , CO, CO 2 and the like is generated. However, since various by-products coexist, the utility value of the product gas is not so high as it is. Therefore, if a highly dispersed transition metal catalyst is used, high concentrations of H 2 and CO can be obtained from the product gas, or CH 4 can be generated.
その結果、バイオマスのガス化／多段触媒変換プロセスを経て、エネルギー回収技術により、ＣＯ２の排出抑制と副生成物の低減を可能にすることができる。 As a result, through the process of biomass gasification / multistage catalytic conversion, it is possible to suppress CO 2 emission and reduce by-products by energy recovery technology.
そこで、本発明は、遷移金属原子を担体表面に原子レベルで分散させた高分散遷移金属触媒、及びシリカ担体表面への遷移金属原子の高分散担持方法を提供することを目的とするものである。 Accordingly, the object of the present invention is to provide a highly dispersed transition metal catalyst in which transition metal atoms are dispersed at the atomic level on the support surface, and a method for highly dispersing and supporting the transition metal atoms on the silica support surface. .
上記課題を解決するために、本発明は、
（１）
遷移金属の無機塩をアンモニウム水溶液に添加した混合液で、遷移金属アンモニウム配位錯イオンを形成し、
前記混合液をシリカ担体と接触させて前記シリカ担体表面のシラノール基の酸素原子に前記遷移金属を結合させ、
前記遷移金属と前記酸素と前記シリカ担体表面のケイ素原子とを化学結合させ、
前記シリカ担体を回収し、
前記シリカ担体の露出表面に、遷移金属原子を原子レベルで高分散担持させてなることを特徴とする
高分散遷移金属触媒の製造方法。
（２）
前記遷移金属が、ニッケル、銅、亜鉛、コバルト、カドミウムおよびクロムの内から選択される１種またはそれ以上である（１）に記載の高分散遷移金属触媒の製造方法。
（３）
遷移金属の無機塩をアンモニウム水溶液に添加した混合液で、遷移金属アンモニウム配位錯イオンを形成し、
前記混合液をシリカ担体と接触させることで、
前記シリカ担体表面のシラノール基の酸素原子と前記遷移金属が結合し、
さらに、前記遷移金属と前記酸素と前記シリカ担体表面のケイ素原子とが化学結合することで、
前記シリカ担体の露出表面に、遷移金属原子を原子レベルで高分散担持させることを特徴とする
シリカ担体表面への遷移金属原子の高分散担持方法。
（４）
（１）又は（２）に記載の高分散遷移金属触媒の製造方法によって得られた高分散遷移金属触媒に、バイオマスから得られた混合ガスを接触させることで、二酸化炭素の排出を抑制することを特徴とするバイオマスガスの処理方法。
（５）
（１）又は（２）に記載の高分散遷移金属触媒の製造方法によって得られた高分散遷移金属触媒に、バイオマスから得られた混合ガスを接触させることで、タール成分の生成量を抑制することを特徴とするバイオマスガスの処理方法。
（６）
（１）又は（２）に記載の高分散遷移金属触媒の製造方法によって得られた高分散遷移金属触媒に、バイオマスから得られた混合ガスを接触させることで、水素ガス濃度を濃縮し、分離することを特徴とする水素ガスの製造方法。
とした。
In order to solve the above problems, the present invention provides:
(1)
In a mixed solution in which an inorganic salt of a transition metal is added to an aqueous ammonium solution, a transition metal ammonium coordination complex ion is formed,
Contacting the mixed liquid with a silica carrier to bind the transition metal to an oxygen atom of a silanol group on the surface of the silica carrier;
Chemically bonding the transition metal, the oxygen, and silicon atoms on the surface of the silica support;
Recovering the silica support;
A process for producing a highly dispersed transition metal catalyst , wherein transition metal atoms are supported on an exposed surface of the silica carrier in a highly dispersed state at an atomic level.
(2)
The method for producing a highly dispersed transition metal catalyst according to (1), wherein the transition metal is one or more selected from nickel, copper, zinc, cobalt, cadmium and chromium.
(3)
In a mixed solution in which an inorganic salt of a transition metal is added to an aqueous ammonium solution, a transition metal ammonium coordination complex ion is formed,
By contacting the mixed solution with a silica carrier,
The oxygen atom of the silanol group on the surface of the silica support is bonded to the transition metal,
Furthermore, the transition metal, the oxygen and the silicon atom on the surface of the silica support are chemically bonded,
A method for highly dispersing and supporting a transition metal atom on a surface of a silica support, wherein the transition metal atom is supported on the exposed surface of the silica support in a highly dispersed state at an atomic level.
(4)
Suppressing the emission of carbon dioxide by bringing the mixed gas obtained from biomass into contact with the highly dispersed transition metal catalyst obtained by the method for producing a highly dispersed transition metal catalyst according to (1) or (2) A method for treating biomass gas, characterized by:
(5)
The production amount of the tar component is suppressed by bringing the mixed gas obtained from biomass into contact with the highly dispersed transition metal catalyst obtained by the method for producing a highly dispersed transition metal catalyst according to (1) or (2). A method for treating biomass gas, characterized in that:
(6)
The hydrogen gas concentration is concentrated and separated by bringing the mixed gas obtained from biomass into contact with the highly dispersed transition metal catalyst obtained by the method for producing a highly dispersed transition metal catalyst according to (1) or (2) A method for producing hydrogen gas, comprising:
It was.
本発明は、遷移金属とシリカ担体表面のケイ素原子との間に，酸素を介して化学結合を形成することで、過去に報告されている遷移金属の担持方法と比較し、遷移金属がシリカ担体表面に原子レベルで分散担持され、高性能な触媒を作製できる。また同時に当該高分散担持方法は、工業的に大量製造にも容易に適用することができる。 The present invention forms a chemical bond via oxygen between the transition metal and the silicon atom on the surface of the silica support, so that the transition metal is a silica support compared to the transition metal support methods reported in the past. A high performance catalyst can be produced by being dispersed and supported on the surface at the atomic level. At the same time, the high dispersion supporting method can be easily applied to industrial mass production.
資源循環・廃棄物研究センターの熱処理プラントにおいて、本発明に係る高分散遷移金属触媒を改質触媒として用い、バイオマスから得られたガスの改質を行うことにより、高濃度（４０−６０％）の水素生成や、二酸化炭素及びタール量の大幅削減（０．１ｇ／ＮＭ３以下）が可能になる（図３（Ａ）、（Ｂ））。 By using the highly dispersed transition metal catalyst according to the present invention as a reforming catalyst in a heat treatment plant of the Resource Recycling and Waste Research Center, reforming the gas obtained from the biomass enables high concentration (40-60%) Generation of hydrogen and a significant reduction in carbon dioxide and tar content (0.1 g / NM 3 or less) are possible (FIGS. 3A and 3B).
本発明は、水素生成、アンモニアやメタノールの合成、ガス精製と転換、水素添加、脱水素、石油精製、環境浄化などの広範な技術分野で高効率な工業用触媒として利用することができ、また、材料として、磁性体材料、電気材料、顔料の原料、染色材料としての応用も期待できる。 The present invention can be used as a highly efficient industrial catalyst in a wide range of technical fields such as hydrogen production, synthesis of ammonia and methanol, gas purification and conversion, hydrogenation, dehydrogenation, petroleum refining, and environmental purification. As materials, magnetic materials, electrical materials, pigment raw materials, and dyeing materials can also be expected.
次に、実施例に基づいて本発明を具体的に説明する。なお、本発明は下記実施例に限定されるものではない。 Next, the present invention will be specifically described based on examples. In addition, this invention is not limited to the following Example.
本発明である高分散遷移金属触媒は、図１に示すように、シリカのようによく用いられる担体表面に、種々の遷移金属を原子レベルで高分散担持する方法であり、
下記の方法によって得られる：
（１）遷移金属（Ｍ）の無機塩を、水に溶解させ、アンモニウム水溶液を添加し、反応させ、遷移金属アンモニウム配位錯イオンを形成する。遷移金属塩を水に溶解してから、アンモニウム水溶液を添加し、遷移金属種の錯イオンを形成することにより塩基溶液に溶解性が高い遷移金属が得られる。塩基溶液に溶解性が高い遷移金属種の錯体の形成によって、遷移金属酸化物の生成を抑制することができるため、遷移金属を原子レベルでシリカ担体の露出表面に分散させることができる。遷移金属として、ニッケル、銅、亜鉛、コバルト、カドミウムおよびクロムが例示できる。
触媒として、
ニッケルは、水素化処理、脱硫、水素添加、窒素化合物の除去、スチームリフォーミング、メタネーション、石油精製、水素製造、オゾン分解などに利用できる。
銅は、脱硫、ＣＯの除去、ＣＯ転換、ＣＯ酸化、スチームリフォーミング、メタノール合成、モノマーの精製、水素還元、脱水素反応、水素製造、オゾン分解、有害ガスの除去などに利用できる。
亜鉛は、塩素化合物除去、脱硫、ＣＯの除去、ＣＯ転換、スチームリフォーミング、メタノール合成、モノマーの精製、水素還元、石油精製、水素製造、有害ガスの除去などに利用できる。
コバルトは、素化処理、水素添加、石油精製などに利用できる。
（２）遷移金属アンモニウム配位錯イオンをシリカ表面のシラノール基と接触させ、反応させることにより、酸素原子介してシリカ担体のケイ素原子と結合させた。
遷移金属、酸素、そしてケイ素の間に化学結合を形成させることにより、シリカ担体表面に遷移金属を原子レベルで高分散担持させた。
（３）ろ過することにより、水と分離し、原子レベルで高分散担持させた遷移金属原子を回収した。
（４）使用用途により焼成の操作を加える必要がある。
The highly dispersed transition metal catalyst of the present invention, as shown in FIG. 1, is a method of highly dispersing and supporting various transition metals at the atomic level on a support surface often used like silica.
Obtained by the following method:
(1) An inorganic salt of transition metal (M) is dissolved in water, an aqueous ammonium solution is added and reacted to form a transition metal ammonium coordination complex ion. After the transition metal salt is dissolved in water, an aqueous ammonium solution is added to form a transition metal species complex ion, thereby obtaining a transition metal having high solubility in the base solution. Since the formation of transition metal oxides can be suppressed by forming a complex of a transition metal species that is highly soluble in the base solution, the transition metal can be dispersed on the exposed surface of the silica support at the atomic level. Examples of the transition metal include nickel, copper, zinc, cobalt, cadmium and chromium.
As a catalyst,
Nickel can be used for hydrotreatment, desulfurization, hydrogenation, removal of nitrogen compounds, steam reforming, methanation, petroleum refining, hydrogen production, ozonolysis, and the like.
Copper can be used for desulfurization, CO removal, CO conversion, CO oxidation, steam reforming, methanol synthesis, monomer purification, hydrogen reduction, dehydrogenation, hydrogen production, ozonolysis, removal of harmful gases, and the like.
Zinc can be used for chlorine compound removal, desulfurization, CO removal, CO conversion, steam reforming, methanol synthesis, monomer purification, hydrogen reduction, petroleum refining, hydrogen production, harmful gas removal, and the like.
Cobalt can be used for elemental treatment, hydrogenation, petroleum refining and the like.
(2) The transition metal ammonium coordination complex ion was brought into contact with the silanol group on the silica surface and reacted to bind to the silicon atom of the silica support through an oxygen atom.
By forming a chemical bond between the transition metal, oxygen, and silicon, the transition metal was supported in a highly dispersed state at the atomic level on the surface of the silica support.
(3) By filtering, the transition metal atoms separated from water and supported in a highly dispersed state at the atomic level were recovered.
(4) It is necessary to add a baking operation depending on the intended use.
・担体の調整方法
非特許文献１を参照して、メソポーラスシリカ担体を合成して用いた。
-Preparation method of carrier With reference to Non-Patent Document 1, a mesoporous silica carrier was synthesized and used.
（１）比較例（ａ）
従来法（含浸法）でメソポーラスシリカ担体へのＮｉの分散担持方法
２０ｇのエタノールを坩堝に加え、前記合成したメソポーラスシリカ担体重量に対するＮｉＯ重量１０％に相当する硝酸ニッケル六水和物を前記容器に入れ、超音波をかけて溶解させた後、３％の前記合成したメソポーラスシリカ担体を前記容器に入れてから、２時間超音波を続けてかけた。その後、室温でエタノールを蒸発させ、８０℃で乾燥させた。５００℃で５時間焼成することにより、従来法でＮｉが分散したメソポーラスシリカを得た。
(1) Comparative example (a)
Method of Dispersing and Supporting Ni on Mesoporous Silica Support by Conventional Method (Impregnation Method) 20 g of ethanol was added to a crucible, and nickel nitrate hexahydrate corresponding to 10% NiO weight with respect to the weight of the synthesized mesoporous silica support was added to the container. After putting and dissolving by applying ultrasonic waves, 3% of the synthesized mesoporous silica carrier was put in the container, and then ultrasonic waves were continuously applied for 2 hours. Then, ethanol was evaporated at room temperature and dried at 80 ° C. By baking at 500 ° C. for 5 hours, mesoporous silica in which Ni was dispersed was obtained by a conventional method.
（２）実施例（ｂ）
本発明法でメソポーラスシリカ担体へのＮｉの高分散担持方法
１）３０gの水を容器に加え、前記合成したメソポーラスシリカ担体重量に対するＮｉＯ重量１０％に相当する１．２８ｇ硝酸ニッケル六水和物を前記容器に入れ、溶解してからＮｉモル数に対する４倍のＮＨ３水溶液１．１７ｇを滴下し、Ｎｉアンモニウム配位錯イオンを調整し、得られた塩基をＮｉ前躯体とした。
２）攪拌しながら、前記調整したＮｉ前躯体に３ｇの前記合成したメソポーラスシリカ担体を前記容器に入れてから、５分間攪拌を続けた。その後、４８時間静置した。
３）ろ過、洗浄、乾燥などの一連の操作を行なった後、５００℃で５時間焼成し、Ｎｉを高分散したメソポーラスシリカを得た。
(2) Example (b)
Method of high dispersion of Ni on mesoporous silica support according to the method of the present invention 1) 30 g of water is added to a container, and 1.28 g nickel nitrate hexahydrate corresponding to 10% NiO weight with respect to the weight of the synthesized mesoporous silica support is added. After putting into the container and dissolving, 1.17 g of NH 3 aqueous solution 4 times the number of moles of Ni was added dropwise to adjust Ni ammonium coordination complex ions, and the resulting base was used as a Ni precursor.
2) While stirring, 3 g of the synthesized mesoporous silica support was put into the container with the adjusted Ni precursor, and stirring was continued for 5 minutes. Then, it left still for 48 hours.
3) After performing a series of operations such as filtration, washing, and drying, firing was performed at 500 ° C. for 5 hours to obtain mesoporous silica in which Ni was highly dispersed.
・合成した触媒の分析方法
（１）Ｘ線回折装置（理学 Multiflex）を用い、ＣｕＫα 線を得られた生成物（触媒）に照射し、回折角度１０°から９０°までのＸＲＤパターンを得た（図２（Ａ））。
可視・紫外分光装置（PerkinElmer LAMBDA ９５０）を用い、波長４００〜８００ｎｍ範囲に測定し、生成物（触媒）の可視・紫外分光（ＵＶ−ＶＩＳ）スペクトルを得た（図２（Ｂ））。
-Analysis method of synthesized catalyst (1) Using an X-ray diffractometer (Science Multiflex), the product (catalyst) obtained with CuKα rays was irradiated to obtain an XRD pattern with a diffraction angle of 10 ° to 90 °. (FIG. 2 (A)).
Using a visible / ultraviolet spectrophotometer (PerkinElmer LAMBDA 950), measurement was performed in a wavelength range of 400 to 800 nm to obtain a visible / ultraviolet spectroscopic (UV-VIS) spectrum of the product (catalyst) (FIG. 2B).
得られた生成物のＸＲＤパターンを図２（Ａ）に示す。縦軸はピーク回折強度、横軸は回折角度である。従来方法で得られた生成物（触媒）のＸＲＤパターンにはＮｉＯに帰属する回折ピークが観測された。一方、本発明法で、得られた生成物（触媒）のＸＲＤパターンにはＮｉＯに帰属する回折ピークが観測されなかった。このことは、本発明法で、Ｎｉがメソポーラス担体のケイ素との間に結合した（Ｎｉの原子レベル分散）、または極めて小さいＮｉＯ粒子として存在することを示唆している。 The XRD pattern of the obtained product is shown in FIG. The vertical axis represents the peak diffraction intensity, and the horizontal axis represents the diffraction angle. A diffraction peak attributed to NiO was observed in the XRD pattern of the product (catalyst) obtained by the conventional method. On the other hand, no diffraction peak attributed to NiO was observed in the XRD pattern of the product (catalyst) obtained by the method of the present invention. This suggests that, in the method of the present invention, Ni is bonded to silicon of the mesoporous support (atomic level dispersion of Ni) or exists as extremely small NiO particles.
上記生成物のＵＶ−ＶＩＳスペクトルを図２（Ｂ）に示す。縦軸はピーク吸収強度、横軸は波長である。従来方法で得られた上記生成物（触媒）のＵＶ−ＶＩＳスペクトルにはＮｉＯに帰属するバンド（２８９ｎｍ付近のブロードバンド）が観測された。一方、本発明法で、得られた上記生成物（触媒）のＵＶ−ＶＩＳスペクトルにはＮｉＯに帰属するバンドが観測されなかった。 The UV-VIS spectrum of the product is shown in FIG. The vertical axis represents peak absorption intensity, and the horizontal axis represents wavelength. A band attributed to NiO (broadband near 289 nm) was observed in the UV-VIS spectrum of the product (catalyst) obtained by the conventional method. On the other hand, no band attributed to NiO was observed in the UV-VIS spectrum of the product (catalyst) obtained by the method of the present invention.
これらのことから、Ｎｉがすべてメソポーラス担体のケイ素との間に結合した（Ｎｉの原子レベル分散）ことが強く示唆され、小さいＮｉＯ粒子として存在する可能性が排除された。したがって、本発明法でＮｉが原子レベルでメソポーラスシリカ担体表面に高分散担持したと言える。 From these, it was strongly suggested that all Ni was bonded to silicon of the mesoporous support (atomic level dispersion of Ni), and the possibility of existing as small NiO particles was excluded. Therefore, it can be said that Ni was supported in a highly dispersed manner on the surface of the mesoporous silica support at the atomic level in the method of the present invention.
Claims (6)
前記混合液をシリカ担体と接触させて前記シリカ担体表面のシラノール基の酸素原子に前記遷移金属を結合させ、
前記遷移金属と前記酸素と前記シリカ担体表面のケイ素原子とを化学結合させ、
前記シリカ担体を回収し、
前記シリカ担体の露出表面に、遷移金属原子を原子レベルで高分散担持させてなることを特徴とする
高分散遷移金属触媒の製造方法。 In a mixed solution in which an inorganic salt of a transition metal is added to an aqueous ammonium solution, a transition metal ammonium coordination complex ion is formed,
Contacting the mixed liquid with a silica carrier to bind the transition metal to an oxygen atom of a silanol group on the surface of the silica carrier;
Chemically bonding the transition metal, the oxygen, and silicon atoms on the surface of the silica support;
Recovering the silica support;
A process for producing a highly dispersed transition metal catalyst , wherein transition metal atoms are supported on an exposed surface of the silica carrier in a highly dispersed state at an atomic level.
前記混合液をシリカ担体と接触させることで、
前記シリカ担体表面のシラノール基の酸素原子と前記遷移金属が結合し、
さらに、前記遷移金属と前記酸素と前記シリカ担体表面のケイ素原子とが化学結合することで、
前記シリカ担体の露出表面に、遷移金属原子を原子レベルで高分散担持させることを特徴とする
シリカ担体表面への遷移金属原子の高分散担持方法。 In a mixed solution in which an inorganic salt of a transition metal is added to an aqueous ammonium solution, a transition metal ammonium coordination complex ion is formed,
By contacting the mixed solution with a silica carrier,
The oxygen atom of the silanol group on the surface of the silica support is bonded to the transition metal,
Furthermore, the transition metal, the oxygen and the silicon atom on the surface of the silica support are chemically bonded,
A method for highly dispersing and supporting a transition metal atom on a surface of a silica support, wherein the transition metal atom is supported on the exposed surface of the silica support in a highly dispersed state at an atomic level.
バイオマスから得られた混合ガスを接触させることで、二酸化炭素の排出を抑制することを特徴とするバイオマスガスの処理方法。 A highly dispersed transition metal catalyst obtained by the method for producing a highly dispersed transition metal catalyst according to claim 1 or 2,
A method for treating biomass gas, characterized in that emission of carbon dioxide is suppressed by contacting a mixed gas obtained from biomass.
バイオマスから得られた混合ガスを接触させることで、タール成分の生成量を抑制することを特徴とするバイオマスガスの処理方法。 A highly dispersed transition metal catalyst obtained by the method for producing a highly dispersed transition metal catalyst according to claim 1 or 2,
A method for treating biomass gas, wherein a mixed gas obtained from biomass is brought into contact with each other to suppress the amount of tar components produced.
バイオマスから得られた混合ガスを接触させることで、水素ガス濃度を濃縮し、分離することを特徴とする水素ガスの製造方法。 A highly dispersed transition metal catalyst obtained by the method for producing a highly dispersed transition metal catalyst according to claim 1 or 2,
A method for producing hydrogen gas, comprising concentrating and separating hydrogen gas concentration by contacting a mixed gas obtained from biomass.
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