JP2000260457A - Carbon monoxide eliminator of fuel cell - Google Patents
Carbon monoxide eliminator of fuel cellInfo
- Publication number
- JP2000260457A JP2000260457A JP11061423A JP6142399A JP2000260457A JP 2000260457 A JP2000260457 A JP 2000260457A JP 11061423 A JP11061423 A JP 11061423A JP 6142399 A JP6142399 A JP 6142399A JP 2000260457 A JP2000260457 A JP 2000260457A
- Authority
- JP
- Japan
- Prior art keywords
- carbon monoxide
- inner container
- gas
- outer container
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Catalysts (AREA)
- Fuel Cell (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Hydrogen, Water And Hydrids (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は固体高分子型燃料電
池システムにおいて、原料ガスから改質器を経て得られ
た改質ガス中に含まれる一酸化炭素を除去して水素リッ
チなガスを燃料電池へ供給するようにするために供給ラ
インの途中に設けて用いられる一酸化炭素除去器に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polymer electrolyte fuel cell system, which removes carbon monoxide contained in a reformed gas obtained from a raw material gas through a reformer to produce a hydrogen-rich gas as a fuel. The present invention relates to a carbon monoxide remover provided in the middle of a supply line to supply a battery.
【０００２】[0002]
【従来の技術】固体高分子型燃料電池システムは、水素
の有している化学エネルギーを電気エネルギーに変換す
るものである。実業的には比較的容易かつ安価に入手で
きる天然ガス、ナフサ等の炭化水素やメタノール等のア
ルコール類の原料ガス（以下原料ガスという）を、水蒸
気と混合して改質器及び一酸化炭素変成器で改質するこ
とにより生成した水素リッチな改質ガスを得て、その水
素リッチなガスを燃料電池本体の電極（燃料極）に供給
して発電する。2. Description of the Related Art A polymer electrolyte fuel cell system converts chemical energy of hydrogen into electric energy. A raw material gas (hereinafter referred to as a raw material gas) of natural gas, hydrocarbons such as naphtha, and alcohols such as methanol, which can be obtained relatively easily and inexpensively, is mixed with steam to reformer and carbon monoxide conversion. A hydrogen-rich reformed gas generated by reforming in a reactor is obtained, and the hydrogen-rich gas is supplied to an electrode (fuel electrode) of the fuel cell body to generate power.
【０００３】改質器においてはバーナで高温に加熱した
改質用触媒層に原料ガスを通過させて改質反応を行う
が、改質反応に伴って、燃料電池の触媒劣化の原因とな
る一酸化炭素も発生する。改質ガスに一酸化炭素が含ま
れていると、この一酸化炭素によって燃料電池の電極が
被毒して性能低下を来たすことから、水素リッチなガス
を燃料電池の燃料極へ供給する前に改質器で改質された
ガス中の一酸化炭素を除去する必要がある。一酸化炭素
の濃度は、一酸化炭素変成器で１％程度まで低減される
が、電極の劣化を避けるために更に濃度を下げる必要が
ある。In a reformer, a raw material gas is passed through a reforming catalyst layer heated to a high temperature by a burner to perform a reforming reaction. However, the reforming reaction may cause deterioration of a fuel cell catalyst. Carbon oxides are also generated. If the reformed gas contains carbon monoxide, this carbon monoxide will poison the fuel cell electrodes and reduce the performance.Before supplying the hydrogen-rich gas to the fuel cell anode, It is necessary to remove carbon monoxide in the gas reformed by the reformer. Although the concentration of carbon monoxide is reduced to about 1% in the carbon monoxide converter, it is necessary to further reduce the concentration to avoid electrode deterioration.
【０００４】特に、固体高分子型の燃料電池システムの
場合、一酸化炭素を１０ＰＰＭ程度のレベルに低下させ
ることが必要であって、改質器及び一酸化炭素変成器で
改質した改質ガスに空気を混合し、一酸化炭素を選択的
に酸化する選択酸化触媒層を通過させることによって一
酸化炭素を低レベルに落とした水素ガスを燃料電池に供
給する一酸化炭素除去器を設けている。In particular, in the case of a polymer electrolyte fuel cell system, it is necessary to reduce carbon monoxide to a level of about 10 PPM, and the reformed gas reformed by a reformer and a carbon monoxide converter is required. Is provided with a carbon monoxide remover for supplying hydrogen gas to a fuel cell in which carbon monoxide has been reduced to a low level by mixing air with air and passing through a selective oxidation catalyst layer that selectively oxidizes carbon monoxide. .
【０００５】従来の一酸化炭素除去器１は、図４に示す
ように、ルテニウム、ロジウム等の触媒２を粒状にして
細長い反応容器３（鋼管容器）に収納した構造である。
この反応容器３は長手方向に沿って改質ガスが空気と共
に導入される構成であり、この改質ガスが反応容器３を
通過する間に改質ガス中の一酸化炭素を触媒２の作用で
酸化させることによって改質ガスから一酸化炭素を除去
することが行われている。As shown in FIG. 4, the conventional carbon monoxide remover 1 has a structure in which a catalyst 2 such as ruthenium or rhodium is granulated and stored in an elongated reaction vessel 3 (steel pipe vessel).
The reaction vessel 3 has a configuration in which the reformed gas is introduced along with the air along the longitudinal direction. During the passage of the reformed gas through the reaction vessel 3, carbon monoxide in the reformed gas is removed by the action of the catalyst 2. It has been practiced to remove carbon monoxide from reformed gas by oxidizing.
【０００６】また、この一酸化炭素除去器１において、
良好な選択性を得る（一酸化炭素だけを選択的に酸化さ
せる）ために、選択酸化触媒層４を所定の運転温度に保
つ必要がある。この運転温度は通常摂氏１５０度〜２０
０度程度であって、起動時においては選択酸化触媒層４
の周りにヒータを設置して加熱するか、バーナで高温の
ガスを生成してそれを一酸化炭素除去器１の周りに送り
込むことによって昇温する方法がとられている。通常運
転時においては触媒層４で生じる反応が発熱反応であ
り、この発熱反応の熱によつて触媒層４が昇温されるの
で外部から昇温することなく所定の温度を保つことがで
きる。In this carbon monoxide remover 1,
In order to obtain good selectivity (selectively oxidize only carbon monoxide), it is necessary to keep the selective oxidation catalyst layer 4 at a predetermined operating temperature. This operating temperature is typically between 150 and 20 degrees Celsius.
It is about 0 degrees, and at the time of startup, the selective oxidation catalyst layer 4
And a heater is provided around the carbon monoxide remover 1 to generate a high-temperature gas and send it around the carbon monoxide remover 1 to raise the temperature. During normal operation, the reaction occurring in the catalyst layer 4 is an exothermic reaction, and the temperature of the catalyst layer 4 is raised by the heat of the exothermic reaction, so that a predetermined temperature can be maintained without externally raising the temperature.
【０００７】[0007]
【発明が解決しようとする課題】ところが、触媒層４の
反応が均一でないと、触媒層４内に温度差が生じ、触媒
層４内の温度が部分的に摂氏２００度以上になることが
ある。摂氏２００度以上の温度になると、触媒２の劣化
が生じたり、また、反応がメタン化反応に移行し、改質
ガス中の水素を減少させたりすることがある。However, if the reaction of the catalyst layer 4 is not uniform, a temperature difference occurs in the catalyst layer 4 and the temperature in the catalyst layer 4 may partially increase to 200 ° C. or more. . When the temperature reaches 200 degrees Celsius or more, the catalyst 2 may be degraded, or the reaction may shift to a methanation reaction to reduce the amount of hydrogen in the reformed gas.
【０００８】図４に示す一酸化炭素除去器１の場合、反
応容器３の管の長さが長いため、改質ガスの流れ方向に
おいて触媒層４の温度差が大きくなると共に半径方向に
も温度差が生じ、特に、改質ガスの流れ方向に触媒層４
の温度差があると、反応容器３の入口から導入された空
気がガスの流れ方向で一酸化炭素と一様に反応しないた
め、均一な反応温度とすることができなかった。このよ
うな反応容器３では入口側のみ活発な反応が生じ温度が
摂氏２００度以上に上がり、出口側では触媒層４の所定
の温度としては不足ぎみとなり良好な酸化反応ができな
いという問題があった。In the case of the carbon monoxide remover 1 shown in FIG. 4, since the length of the tube of the reaction vessel 3 is long, the temperature difference of the catalyst layer 4 in the flow direction of the reformed gas increases, and the temperature also increases in the radial direction. A difference is generated, and in particular, the catalyst layer 4
When there is a temperature difference of, the air introduced from the inlet of the reaction vessel 3 does not uniformly react with carbon monoxide in the gas flow direction, so that a uniform reaction temperature could not be obtained. In such a reaction vessel 3, there was a problem that an active reaction occurred only on the inlet side and the temperature rose to 200 ° C. or more, and on the outlet side the predetermined temperature of the catalyst layer 4 was insufficient and a favorable oxidation reaction could not be performed. .
【０００９】そこで、本発明は上述のような問題を解消
し、改質ガス中の一酸化炭素を除去する反応が行われる
ときに触媒層をできるだけ均一な反応温度とすることの
できる一酸化炭素除去器を提供することを目的とする。Therefore, the present invention solves the above-mentioned problems and provides a carbon monoxide capable of keeping the catalyst layer at a reaction temperature as uniform as possible when the reaction for removing carbon monoxide in the reformed gas is performed. It is intended to provide a remover.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に、請求項１記載の発明は、原料ガスを改質器によって
改質して得た一酸化炭素を含む水素リッチの改質ガスを
空気と混合して触媒層を通過させることによって改質ガ
ス中の一酸化炭素を低減する一酸化炭素除去器におい
て、一酸化炭素除去器は外容器と内容器とからなる二重
円筒形とし、外容器の一方の端面の中心に改質ガスと空
気との混合気を導入する入口、他方の端面の中心に混合
気を排出する出口を設け、内容器内に一酸化炭素を選択
的に酸化させて一酸化炭素を低減する触媒を充填し、内
容器の端面中心に混合気を排出する出口を設け、内容器
の出口は外容器の出口と共通の出口とし、内容器の出口
端面を外容器の出口端面に密着して設置し、内容器の円
筒面に混合気の入口となる多数の孔を設けたものであ
る。In order to achieve the above-mentioned object, the invention according to claim 1 provides a hydrogen-rich reformed gas containing carbon monoxide obtained by reforming a raw material gas by a reformer. In a carbon monoxide remover that reduces carbon monoxide in the reformed gas by mixing with air and passing through a catalyst layer, the carbon monoxide remover has a double cylindrical shape consisting of an outer container and an inner container, An inlet for introducing a mixture of reformed gas and air is provided at the center of one end of the outer container, and an outlet for discharging the mixture is provided at the center of the other end, and carbon monoxide is selectively oxidized in the inner container. The inner container is filled with a catalyst to reduce carbon monoxide, and an outlet for discharging the air-fuel mixture is provided at the center of the inner surface of the inner container.The outlet of the inner container is made a common outlet with the outlet of the outer container, and the outlet end surface of the inner container is exposed. It is installed in close contact with the outlet end of the container, and the mixture Made is provided with a plurality of holes.
【００１１】請求項２記載の発明は、請求項１記載の発
明において、前記内容器の高さと直径の比を約１：５と
するものである。According to a second aspect of the present invention, in the first aspect of the present invention, the ratio between the height and the diameter of the inner container is about 1: 5.
【００１２】請求項３記載の発明は、請求項１記載の発
明において、前記外容器と内容器とは正多角形の二重筒
形であり、内容器の高さと内容器の中心を通る対角線長
さとの比を約１：５とするものである。According to a third aspect of the present invention, in the first aspect of the present invention, the outer container and the inner container have a regular polygonal double cylinder shape, and the height of the inner container and a diagonal line passing through the center of the inner container. The ratio with the length is about 1: 5.
【００１３】[0013]
【発明の実施の形態】以下、本発明の一実施形態につい
て図面に基づいて説明する。なお、図４と同一の構成要
素には同一の符号を付してその詳細な説明は省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Note that the same components as those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof will be omitted.
【００１４】図１は原料ガスから水素リッチなガスを得
る工程の説明図である。この工程は脱硫器５、改質器
６、熱交換器７、一酸化炭素変成器８、一酸化炭素除去
器１とから構成される。FIG. 1 is an explanatory diagram of a process for obtaining a hydrogen-rich gas from a source gas. This step includes a desulfurizer 5, a reformer 6, a heat exchanger 7, a carbon monoxide converter 8, and a carbon monoxide remover 1.
【００１５】脱硫器５において原料ガスは、原料ガス中
に不純物として含まれる硫黄化合物が脱硫器５の内部に
充填された脱硫触媒と接触して除去される。改質器６に
おいて脱硫された原料ガスに水蒸気が加えられ、改質器
５の内部に充填され摂氏７００度程度の高温に保持され
た改質触媒と接触して水素リッチな改質ガスが生成され
る。改質器６から出た改質ガスは、一酸化炭素変成器８
の動作温度まで冷却するため、熱交換器７へ送られる。
熱交換器７において、改質ガスと冷却水との間で熱交換
が行われ摂氏２３０度〜２５０度に冷却される。熱交換
器７で冷却された改質ガスは、一酸化炭素変成器８へ送
られる。一酸化炭素変成器８において改質ガスは、改質
ガス中に含まれる一酸化炭素成分が一酸化炭素変成器８
内部に充填された変成触媒と接触して変成される。変成
されることにより一酸化炭素濃度が１％以下に低減され
る。さらに一酸化炭素除去器１おいて改質ガスは、空気
と混合され摂氏１５０〜２００度の温度で一酸化炭素除
去器１に充填されたルテニウム、ロジウム等の触媒２と
接触して一酸化炭素濃度を１０ＰＰＭ以下に低減され
る。一酸化炭素除去器１から排出されたガスは、燃料電
池９の燃料極に供給され、一部はリサイクルラインを通
ってバーナの燃料として使用される。In the desulfurizer 5, the raw material gas is removed by contacting a sulfur compound contained as an impurity in the raw material gas with a desulfurization catalyst filled in the desulfurizer 5. Steam is added to the raw material gas desulfurized in the reformer 6, and the reformed gas is contacted with a reforming catalyst filled in the reformer 5 and maintained at a high temperature of about 700 degrees Celsius to generate a hydrogen-rich reformed gas. Is done. The reformed gas output from the reformer 6 is supplied to the carbon monoxide converter 8
Is sent to the heat exchanger 7 in order to cool it down to the operating temperature.
In the heat exchanger 7, heat exchange is performed between the reformed gas and the cooling water to be cooled to 230 to 250 degrees Celsius. The reformed gas cooled in the heat exchanger 7 is sent to the carbon monoxide converter 8. In the carbon monoxide converter 8, the reformed gas contains carbon monoxide components contained in the reformed gas.
It is converted when it comes into contact with the conversion catalyst filled therein. By the transformation, the carbon monoxide concentration is reduced to 1% or less. Further, in the carbon monoxide remover 1, the reformed gas is mixed with air and brought into contact with a catalyst 2, such as ruthenium or rhodium, filled in the carbon monoxide remover 1 at a temperature of 150 to 200 degrees C. The concentration is reduced to less than 10 PPM. The gas discharged from the carbon monoxide remover 1 is supplied to the fuel electrode of the fuel cell 9, and a part of the gas passes through a recycling line and is used as fuel for a burner.
【００１６】図２は本発明の一酸化炭素除去器１の側断
面図である。図３は一酸化炭素除去器１の平面図であ
る。FIG. 2 is a side sectional view of the carbon monoxide remover 1 of the present invention. FIG. 3 is a plan view of the carbon monoxide remover 1.
【００１７】本発明の実施形態の一酸化炭素除去器１は
円筒形の外容器１２と円筒形の内容器１３とで構成され
ている。外容器１２の高さＬｏは内容器１３の高さＬｉ
より高く、外容器１２の直径Ｄｏは内容器１３の直径Ｄ
ｉより大きい。外容器１２は密閉された容器の天板１４
ａの中心および底板１５ａの中心に開口が設けられ、そ
れぞれガス導入管１６、ガス排出管１７が接続されてい
る。１３は内容器であり、内容器１３の高さＬｉと直径
Ｄｉの比を約１：５としており、内容器１３の側面１８
ｂには内容器のガス導入口となる多数の円孔２１が設け
られている。内容器１３の底板１５ｂは外容器１２の底
板１５ａと密着して設置されており、内容器１３の底板
１５ｂの中心に設けられた開口が外容器１２の底板１５
ａに設けられた開口と接続されガス排出管１７と連接さ
れている。内容器１３には一酸化炭素を選択的に酸化し
て低減するルテニウム、ロジウム等の粒状の触媒２が充
填されて触媒層４を形成している。この触媒層４の触媒
２がこぼれないようにガス排出管１７と接続される開口
にはメッシュが設けられている。また、内容器１３の側
面１８ｂの円孔２１は粒状の触媒２の大きさよりも小さ
な孔になっている。内容器１３の天板１４ｂと外容器１
２の天板１４ａとの間及び内容器１３の側面１８ｂと外
容器１２の側面１８ａとの間には空間がありガスの通路
２２になっている。The carbon monoxide remover 1 according to the embodiment of the present invention comprises a cylindrical outer container 12 and a cylindrical inner container 13. The height Lo of the outer container 12 is the height Li of the inner container 13.
Higher, the diameter Do of the outer container 12 is equal to the diameter D of the inner container 13.
Greater than i. The outer container 12 is a top plate 14 of a closed container.
Openings are provided at the center of the center a and the center of the bottom plate 15a, and the gas introduction pipe 16 and the gas discharge pipe 17 are connected to each other. Reference numeral 13 denotes an inner container, which has a ratio of the height Li to the diameter Di of the inner container 13 of about 1: 5.
b has a large number of circular holes 21 serving as gas inlets for the inner container. The bottom plate 15b of the inner container 13 is installed in close contact with the bottom plate 15a of the outer container 12, and an opening provided at the center of the bottom plate 15b of the inner container 13 is
a and is connected to the gas discharge pipe 17. The inner container 13 is filled with a granular catalyst 2 such as ruthenium or rhodium which selectively oxidizes and reduces carbon monoxide to form a catalyst layer 4. A mesh is provided at an opening of the catalyst layer 4 connected to the gas discharge pipe 17 so as not to spill the catalyst 2. The circular hole 21 on the side surface 18 b of the inner container 13 is a hole smaller than the size of the granular catalyst 2. Top plate 14b of inner container 13 and outer container 1
There is a space between the top plate 14a and the side surface 18b of the inner container 13 and the side surface 18a of the outer container 12 to form a gas passage 22.
【００１８】一酸化炭素除去器１の良好な運転温度は通
常摂氏１５０度〜２００度程度であって、起動時におい
ては触媒層４がこの運転温度まで昇温される。通常運転
時になると触媒層４で生じる反応が発熱反応であり、こ
の発熱反応の熱によって触媒層４の温度が所定温度に昇
温されるので外部からの昇温が停止される。The good operating temperature of the carbon monoxide remover 1 is usually about 150 to 200 degrees Celsius, and the catalyst layer 4 is heated to this operating temperature at the time of starting. During normal operation, the reaction that occurs in the catalyst layer 4 is an exothermic reaction, and the heat of the exothermic reaction raises the temperature of the catalyst layer 4 to a predetermined temperature, so that the increase in temperature from the outside is stopped.
【００１９】改質ガスと空気との混合気が一酸化炭素除
去器１に送られると、混合気はガス導入管１６から進入
し、内容器１３の天板１４ｂに当たり周りに均等に分散
する。分散した混合気は、ガス通路を経て内容器１３の
側面１８ｂの円孔２１から触媒層４に進入する。混合気
が粒状の触媒２の隙間を通りぬける際、混合気中の一酸
化炭素と酸素とが接触して反応し二酸化炭素になること
により一酸化炭素が減少されてガス排出管１７から出て
行く。When the mixture of the reformed gas and the air is sent to the carbon monoxide remover 1, the mixture enters from the gas introduction pipe 16, hits the top plate 14 b of the inner container 13, and is uniformly dispersed around the top plate 14 b. The dispersed gas mixture enters the catalyst layer 4 from the circular hole 21 on the side surface 18b of the inner container 13 via the gas passage. When the air-fuel mixture passes through the gap between the granular catalysts 2, carbon monoxide and oxygen in the air-fuel mixture come into contact and react with each other to form carbon dioxide, so that the carbon monoxide is reduced and exits from the gas discharge pipe 17. go.
【００２０】このように、混合気は内容器１３の天板１
４ｂの上部中心から進入し、均等に分散されて内容器１
３側面１８ｂの円孔２１から均等に触媒層４に進入する
ので、混合気と触媒２とが均一に接触して反応が行われ
る。反応が均一に行われるので、内容器１３の側面１８
ｂにおいて、温度分布が一様になり一部分だけ極端に上
昇するようなことはない。また、触媒層４の内部および
出口付近でも混合気が均一に通過するので反応が均一に
行われ温度不足ぎみとなることがない。触媒層４全体と
して摂氏１５０度〜２００度の範囲内に保つことができ
る。As described above, the air-fuel mixture is supplied to the top plate 1 of the inner container 13.
4b enters from the upper center and is evenly distributed to the inner container 1
Since the catalyst layer 4 uniformly enters the catalyst layer 4 from the circular holes 21 on the three side surfaces 18b, the mixture is uniformly contacted with the catalyst 2 and the reaction is performed. Since the reaction is performed uniformly, the side surface 18 of the inner container 13
In b, the temperature distribution becomes uniform and there is no extreme rise in a part. In addition, since the air-fuel mixture uniformly passes through the inside of the catalyst layer 4 and also near the outlet, the reaction is performed uniformly and the temperature does not become insufficient. The entire catalyst layer 4 can be kept in the range of 150 to 200 degrees Celsius.
【００２１】以上、一実施形態に基づいて本発明を説明
したが、本発明はこれに限定されるものではない。本発
明は一酸化炭素除去器１を外容器１２と内容器１３とか
らなる二重円筒形の構造としているが多角形の筒状の外
容器１２と内容器１３とを組み合わせた二重構造であっ
ても良い。内容器１３の天板１４ｂと外容器１２の天板
１４ａとの間及び内容器１３の側面１８ｂと外容器１２
の側面１８ａとの間に空間が形成され、この空間を混合
気が均等に通過して内容器１３の側面１８ｂに均一に流
れ込むようになれば円筒形状でなくても良い。また、多
角形の筒状の容器と円筒状の容器とを組み合わせた二重
構造であっても良い。As described above, the present invention has been described based on one embodiment, but the present invention is not limited to this. In the present invention, the carbon monoxide remover 1 has a double cylindrical structure including an outer container 12 and an inner container 13, but has a double structure in which a polygonal cylindrical outer container 12 and an inner container 13 are combined. There may be. The space between the top plate 14b of the inner container 13 and the top plate 14a of the outer container 12, and the side surface 18b of the inner container 13 and the outer container 12
A space may be formed between the inner container 13 and the side surface 18a of the inner container 13 as long as the air-fuel mixture uniformly passes through the space and flows uniformly into the side surface 18b of the inner container 13. Further, it may have a double structure in which a polygonal cylindrical container and a cylindrical container are combined.
【００２２】[0022]
【発明の効果】請求項１記載の発明によれば、一酸化炭
素除去器は外容器と内容器とからなる二重円筒形とし、
ガス導入口を内容器の端面中心の上部に設け、触媒の充
填された内容器の円筒面にガスの入口となる多数の孔を
設けることによって、ガス導入口から進入した改質ガス
と空気との混合気が内容器の端面に当たって周辺に均等
に分散された後、内容器の円筒部の孔に均一に流れ込
み、触媒と接触するので、均一な酸化反応を行わせるこ
とができる。均一な酸化反応が行われることによって触
媒層での温度差が少なくなり良好な温度状態を保つこと
ができる。According to the first aspect of the present invention, the carbon monoxide remover has a double cylindrical shape comprising an outer container and an inner container,
A gas inlet is provided above the center of the end face of the inner container, and a number of holes serving as gas inlets are provided on the cylindrical surface of the inner container filled with the catalyst, so that the reformed gas and air entering from the gas inlet are provided. After the air-fuel mixture strikes the end surface of the inner container and is uniformly dispersed around the inner surface, the mixture flows uniformly into the holes of the cylindrical portion of the inner container and comes into contact with the catalyst, so that a uniform oxidation reaction can be performed. By performing a uniform oxidation reaction, the temperature difference in the catalyst layer is reduced, and a favorable temperature state can be maintained.
【００２３】請求項２記載の発明によれば、内容器の高
さと直径の比を約１：５とすることによって一酸化炭素
除去器をコンパクトで高率の良いものとすることができ
る。According to the second aspect of the present invention, the carbon monoxide remover can be made compact and high in efficiency by setting the ratio of the height and the diameter of the inner container to about 1: 5.
【００２４】請求項３記載の発明によれば、前記外容器
と前記内容器とは正多角形の筒形であり、内容器の高さ
と端面の中心を通る対角線の平均長さとの比を約１：５
とすることによって一酸化炭素除去器をコンパクトで高
率の良いものとすることができる。According to the third aspect of the present invention, the outer container and the inner container have a regular polygonal cylindrical shape, and the ratio between the height of the inner container and the average length of a diagonal line passing through the center of the end surface is approximately equal to the outer container. 1: 5
By doing so, the carbon monoxide remover can be made compact and high in efficiency.
【図１】原料ガスから水素リッチな改質ガスを得る工程
の説明図である。FIG. 1 is an explanatory diagram of a process of obtaining a hydrogen-rich reformed gas from a raw material gas.
【図２】本発明の一酸化炭素除去器の側断面図である。FIG. 2 is a side sectional view of the carbon monoxide remover of the present invention.
【図３】本発明の一酸化炭素除去器の平面図である。FIG. 3 is a plan view of the carbon monoxide remover of the present invention.
【図４】従来の一酸化炭素除去器の側断面図である。FIG. 4 is a side sectional view of a conventional carbon monoxide remover.
１ 一酸化炭素除去器 ２ 触媒 ４ 触媒層 ６ 改質器 １２ 外容器 １３ 内容器 １４ａ 外容器の天板 １４ｂ 内容器の天板 １５ａ 外容器の底板 １５ｂ 内容器の底板 １６ ガス導入管（入口） １７ ガス排出管（出口） ２１ 円孔 REFERENCE SIGNS LIST 1 carbon monoxide remover 2 catalyst 4 catalyst layer 6 reformer 12 outer container 13 inner container 14a outer container top plate 14b inner container top plate 15a outer container bottom plate 15b inner container bottom plate 16 gas inlet pipe (inlet) 17 Gas exhaust pipe (outlet) 21 circular hole
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田島 収 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 藤生 昭 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 Ｆターム(参考） 4D048 AA13 AB01 AC10 BA32Y BA33Y BA39Y BB01 CA01 CA07 CC29 CC38 4G069 AA03 BC70B BC71B CA07 CA14 CC32 5H027 AA06 BA01 BA16 BA17 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Osamu Tajima 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Akira Fujio 2-5-5 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. F term (reference) 4D048 AA13 AB01 AC10 BA32Y BA33Y BA39Y BB01 CA01 CA07 CC29 CC38 4G069 AA03 BC70B BC71B CA07 CA14 CC32 5H027 AA06 BA01 BA16 BA17
Claims (3)
一酸化炭素を含む水素リッチの改質ガスを空気と混合し
て触媒層を通過させることによって改質ガス中の一酸化
炭素を低減する一酸化炭素除去器において、 一酸化炭素除去器は外容器と内容器とからなる二重円筒
形とし、外容器の一方の端面の中心に改質ガスと空気と
の混合気を導入する入口、他方の端面の中心に混合気を
排出する出口を設け、内容器内に一酸化炭素を選択的に
酸化させて一酸化炭素を低減する触媒を充填し、内容器
の端面中心に混合気を排出する出口を設け、内容器の出
口は外容器の出口と共通の出口とし、内容器の出口端面
を外容器の出口端面に密着して設置し、内容器の円筒面
に混合気の入口となる多数の孔を設けたことを特徴とす
る燃料電池の一酸化炭素除去器。1. A method for mixing carbon monoxide in a reformed gas by mixing a hydrogen-rich reformed gas containing carbon monoxide obtained by reforming a raw material gas with air and passing the mixed gas through a catalyst layer. The carbon monoxide remover has a double cylindrical shape consisting of an outer container and an inner container, and a mixture of reformed gas and air is introduced into the center of one end face of the outer container. And an outlet at the center of the other end to discharge the mixture, fill the inner container with a catalyst that selectively oxidizes carbon monoxide to reduce carbon monoxide, and mix it at the center of the end surface of the inner container. An outlet for discharging the air is provided, and the outlet of the inner container is made to be a common outlet with the outlet of the outer container.The outlet end surface of the inner container is installed in close contact with the outlet end surface of the outer container, and the mixture of Carbon monoxide removal for fuel cells characterized by having a large number of holes serving as inlets .
とすることを特徴とする請求項１記載の燃料電池の一酸
化炭素除去器。2. The ratio of height and diameter of the inner container is about 1: 5.
The carbon monoxide remover according to claim 1, wherein:
筒形であり、内容器の高さと内容器の中心を通る対角線
長さとの比を約１：５とすることを特徴とする請求項１
記載の燃料電池の一酸化炭素除去器。3. The container according to claim 1, wherein the outer container and the inner container have a regular polygonal double cylindrical shape, and a ratio of a height of the inner container to a diagonal length passing through the center of the inner container is about 1: 5. Claim 1
A carbon monoxide remover according to the above-described fuel cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11061423A JP2000260457A (en) | 1999-03-09 | 1999-03-09 | Carbon monoxide eliminator of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11061423A JP2000260457A (en) | 1999-03-09 | 1999-03-09 | Carbon monoxide eliminator of fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000260457A true JP2000260457A (en) | 2000-09-22 |
Family
ID=13170673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11061423A Pending JP2000260457A (en) | 1999-03-09 | 1999-03-09 | Carbon monoxide eliminator of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000260457A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8178248B2 (en) | 2005-01-10 | 2012-05-15 | Samsung Sdi Co., Ltd. | Carbon monoxide remover and fuel cell system with the same |
-
1999
- 1999-03-09 JP JP11061423A patent/JP2000260457A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8178248B2 (en) | 2005-01-10 | 2012-05-15 | Samsung Sdi Co., Ltd. | Carbon monoxide remover and fuel cell system with the same |
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