JPH07247832A - Quick heating device for exhaust emission control - Google Patents
Quick heating device for exhaust emission controlInfo
- Publication number
- JPH07247832A JPH07247832A JP6042411A JP4241194A JPH07247832A JP H07247832 A JPH07247832 A JP H07247832A JP 6042411 A JP6042411 A JP 6042411A JP 4241194 A JP4241194 A JP 4241194A JP H07247832 A JPH07247832 A JP H07247832A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- hydrogen storage
- hydrogen
- storage alloy
- catalyst
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims description 15
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 94
- 239000000956 alloy Substances 0.000 claims abstract description 94
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000001257 hydrogen Substances 0.000 claims abstract description 64
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 64
- 239000003054 catalyst Substances 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 12
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 4
- 229910017922 MgLa Inorganic materials 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 238000005984 hydrogenation reaction Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 229910052703 rhodium Inorganic materials 0.000 abstract 1
- 239000010948 rhodium Substances 0.000 abstract 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- Y02E60/32—Hydrogen storage
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Hydrogen, Water And Hydrids (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、排ガス浄化用触媒の
急速加熱装置に関し、特に、自動車エンジンの排気経路
に設けられている触媒を、エンジン始動時、とりわけそ
の初期段階において速やかに加熱し、活性化させて排気
経路から大気中へ排出される排ガス中の有害物を効率よ
く低減するのに有効な水素吸蔵合金を内蔵する装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying catalyst rapid heating device, and more particularly, to rapidly heating a catalyst provided in an exhaust path of an automobile engine at the time of starting the engine, particularly at the initial stage thereof. The present invention relates to a device containing a hydrogen storage alloy that is effective in efficiently reducing harmful substances in exhaust gas that are activated and discharged from the exhaust path to the atmosphere.
【０００２】[0002]
【従来の技術】自動車の排気経路から大気中に排出され
る排ガス中のHCや CO などの有害物を低減するには、排
気経路に設けられた触媒を、エンジンの始動とともに所
定の温度 (約350 ℃程度) にまで加熱し、活性化させる
必要があって、そのため手段として従来は、ヒータや高
周波加熱手段が用いられていた。2. Description of the Related Art In order to reduce harmful substances such as HC and CO in exhaust gas discharged into the atmosphere from an exhaust path of an automobile, a catalyst provided in the exhaust path is cooled to a predetermined temperature (about It is necessary to heat it up to about 350 ° C.) to activate it. For that reason, conventionally, a heater or a high frequency heating means has been used.
【０００３】ところで、これらの加熱手段は、触媒を短
時間で活性化させるために、多量の電気的なエネルギー
が必要となるため、バッテリーの容量を大きくしなけれ
ばならない等の不具合が発生し、実用化が非常に困難な
状況にあった。By the way, these heating means require a large amount of electric energy in order to activate the catalyst in a short time, so that a problem such as a need to increase the capacity of the battery occurs, It was in a very difficult situation for practical application.
【０００４】この点に関する技術的な問題の解決を試み
たものとしては、エンジンの排気経路に設けられた触媒
の周りに水素吸蔵合金を配設し、この水素吸蔵合金への
水素の供給によって水素化反応を起こさせ、その際の反
応熱によって触媒を加熱、活性化するようにした、特開
平5-1250239 号公報に開示の技術が参照される。In an attempt to solve the technical problem related to this point, a hydrogen storage alloy is arranged around a catalyst provided in an exhaust path of an engine, and hydrogen is supplied to the hydrogen storage alloy by supplying hydrogen. Reference is made to the technique disclosed in Japanese Patent Application Laid-Open No. 5-1250239 in which a chemical reaction is caused and the catalyst is heated and activated by the heat of reaction at that time.
【０００５】かかる既知技術によれば、電力を全く使用
せずに触媒を活性化させることができ、バッテリーの容
量増しを伴うような不都合をなくすことができるため、
極めて有効な手段であるといえた。According to such a known technique, the catalyst can be activated without using any electric power, and inconvenience such as an increase in battery capacity can be eliminated.
It was an extremely effective means.
【０００６】しかしながら、この技術で使用される水素
吸蔵合金は、その反応速度が緩慢なために、触媒をエン
ジンの始動の極わずかな時間で活性化させるまでには至
っておらず、未だ多少の改善の余地が残されていた。However, the hydrogen storage alloy used in this technique has a reaction rate that is slow, so that the catalyst has not been activated within a very short period of time when the engine is started. There was room for.
【０００７】[0007]
【発明が解決しようとする課題】この発明の目的は、水
素吸蔵合金の反応熱を利用して排気経路に配置される触
媒をエンジンの始動直後の極わずかな時間で活性化させ
ることができる急速加熱装置を提案するところにある。
この発明の他の目的は、上記急速加熱装置に有効に用い
られる水素吸蔵合金の好ましい化学組成を提案するとこ
ろにある。SUMMARY OF THE INVENTION An object of the present invention is to use a reaction heat of a hydrogen storage alloy to rapidly activate a catalyst arranged in an exhaust path in a very short time immediately after starting an engine. We are proposing a heating device.
Another object of the present invention is to propose a preferable chemical composition of the hydrogen storage alloy effectively used for the rapid heating device.
【０００８】[0008]
【課題を解決するための手段】この発明は、エンジンの
排気経路に設けた排ガス浄化用触媒を加熱して活性化す
る水素吸蔵合金と、この水素吸蔵合金に水素ガスを供給
して該水素吸蔵合金の水素化反応により反応熱を発生さ
せる水素ガス供給手段とを備える装置であって、上記水
素吸蔵合金は、Mg系合金粉末とZr系合金粉末の混合物よ
りなる、ことを特徴とする排ガス用触媒の急速加熱装置
である。上記混合物中におけるZr系合金粉末の体積割合
は、10〜50％とする。上記Zr系合金としては、ZrMn2 合
金, Zr(Mn・Al)2合金の粉末を用いる。上記Mg系合金と
しては、Mg2Ni 合金, MgLa合金, Mg17Mn2 合金の粉末を
用いる。The present invention is directed to a hydrogen storage alloy which heats and activates an exhaust gas purifying catalyst provided in an exhaust path of an engine, and a hydrogen storage alloy which is supplied with hydrogen gas. An apparatus comprising a hydrogen gas supply means for generating reaction heat by hydrogenation reaction of an alloy, wherein the hydrogen storage alloy comprises a mixture of Mg-based alloy powder and Zr-based alloy powder, for exhaust gas characterized by the following: It is a rapid catalyst heating device. The volume ratio of the Zr-based alloy powder in the above mixture is 10 to 50%. As the Zr-based alloy, ZrMn 2 alloy powder or Zr (Mn · Al) 2 alloy powder is used. As the above Mg-based alloy, powders of Mg 2 Ni alloy, MgLa alloy, and Mg 17 Mn 2 alloy are used.
【０００９】[0009]
【作用】水素吸蔵合金を使って排ガス浄化用の触媒を急
速加熱するには、加熱しようとする触媒の周りに粉・粒
状水素吸蔵合金（以下、単に「合金」という）を充てん
した容器を配置して、この容器内へ水素を所定の圧力で
もって供給して水素反応を起こさせ、その際の反応熱に
よって触媒を加熱昇温し、活性化させる方法が有効であ
る。この水素吸蔵合金としては、従来、Zr系の水素吸蔵
合金が使用されていた。表１は、ZrMn合金に水素を供給
した際の経過時間（分）における加熱装置の温度を示し
たものであるが、同表に示すように水素供給圧力10 kg/
cm2 の場合、エンジンの始動から30秒経過した時点にお
いてもその温度は高々220 ℃程度であって、触媒を早期
のうちに活性化 (触媒の活性化温度は約350 ℃程度) さ
せるには不十分なものであった。[Function] To rapidly heat a catalyst for purifying exhaust gas using a hydrogen storage alloy, place a container filled with powder / granular hydrogen storage alloy (hereinafter simply referred to as "alloy") around the catalyst to be heated. Then, hydrogen is supplied into the container at a predetermined pressure to cause a hydrogen reaction, and the reaction heat at that time heats and heats the catalyst to activate it. As this hydrogen storage alloy, a Zr-based hydrogen storage alloy has been conventionally used. Table 1 shows the temperature of the heating device at the elapsed time (minutes) when hydrogen was supplied to the ZrMn alloy. As shown in the table, the hydrogen supply pressure was 10 kg /
In the case of cm 2 , the temperature is about 220 ° C at the most even after 30 seconds from the start of the engine, and it is necessary to activate the catalyst early (the activation temperature of the catalyst is about 350 ° C). It was insufficient.
【００１０】[0010]
【表１】 [Table 1]
【００１１】この発明においては、水素吸蔵合金を、Mg
系合金粉末とZr系合金粉末の混合物よりなるものとした
ので、かかる合金への水素の供給開始からわずか30秒程
度で350 ℃を超える温度まで昇温でき、従って、エンジ
ンの排気経路に設けた触媒の活性化を短時間で行えるこ
とになる。In the present invention, the hydrogen storage alloy is Mg
Since it is composed of a mixture of Zr-based alloy powder and Zr-based alloy powder, the temperature can be raised to over 350 ° C in about 30 seconds from the start of hydrogen supply to such alloy, and therefore, it was installed in the engine exhaust path. The catalyst can be activated in a short time.
【００１２】この発明において、水素吸蔵合金を、Mg系
合金粉末とZr系合金粉末の混合物よりなるものとしたの
は、次の理由からである。すなわち、Zr系水素吸蔵合金
のみの一種とした場合においては、触媒を短時間である
程度の温度までは加熱できるものの、触媒を活性化させ
る温度に到達させるまでには至らず、また、Mg系水素吸
蔵合金のみの場合には、水素の供給による反応熱で到達
温度は400 ℃程度となるが、それのみでは、水素を供給
しても反応は起こりにくい。In the present invention, the hydrogen storage alloy is made of a mixture of Mg type alloy powder and Zr type alloy powder for the following reason. That is, in the case of only one type of Zr-based hydrogen storage alloy, although the catalyst can be heated to a certain temperature in a short time, it does not reach the temperature for activating the catalyst, and the Mg-based hydrogen In the case of only the storage alloy, the reached temperature is about 400 ° C due to the reaction heat due to the supply of hydrogen, but the reaction is unlikely to occur even if only hydrogen is supplied.
【００１３】そこで、この発明においては、270 ℃程度
に至るまではZr系の水素吸蔵合金によって昇温するよう
にし、その際の反応熱でMg系水素吸蔵合金を加熱し、該
Mg系水素吸蔵合金によってそれ以降の昇温を行うように
して、高温でも低温域の作用をそれぞれ分担させたもの
である。Therefore, in the present invention, the temperature is raised up to about 270 ° C. by the Zr-based hydrogen storage alloy, and the reaction heat at that time heats the Mg-based hydrogen storage alloy,
The Mg-based hydrogen storage alloy is used to raise the temperature thereafter, so that the actions in the low temperature region are shared even at high temperatures.
【００１４】この発明に適合するMg系水素吸蔵合金の例
としては、Mg2Ni 合金、MgLa合金あるいはMg17Mn2 合金
などが適用できる (これらのうちのいずれか１種又は２
種以上を同時に使用することもできる) 。特に、Mg2Ni
合金は、10kgf/cm2 以下での発熱温度が最も高く好まし
い。As an example of the Mg-based hydrogen storage alloy suitable for the present invention, Mg 2 Ni alloy, MgLa alloy, Mg 17 Mn 2 alloy or the like can be applied (any one or two of these).
It is also possible to use more than one species at the same time). Especially Mg 2 Ni
The alloy has the highest exothermic temperature at 10 kgf / cm 2 or less and is preferable.
【００１５】また、Zr系水素吸蔵合金としては、ZrMn2
合金の他、Zr( Mn・Al)2合金 (ZrxMny Alz とした場
合、ｘ＝１、ｙ＋ｚ＝２）、あるいはZrVAl 合金等が適
用できる (これらのうちのいずれか１種又は２種以上を
同時に使用することもできる)。特に、ZrMnAl合金は、
反応速度が速く、かつ10kgf/cm2 以下での発熱温度が高
いので好ましい。As the Zr-based hydrogen storage alloy, ZrMn 2
In addition to alloys, Zr (Mn · Al) 2 alloy (when Zr x Mn y Al z , x = 1, y + z = 2), ZrVAl alloy, etc. can be applied (any one or two of these) It is also possible to use more than one species at the same time). In particular, the ZrMnAl alloy is
It is preferable because the reaction rate is fast and the exothermic temperature at 10 kgf / cm 2 or less is high.
【００１６】これらの合金の混合物において、Zr系合金
粉末の配合割合は、より効率的な昇温を行うため10〜50
％の範囲とするのがよい。とくに、Zr系合金粉末とMg系
合金粉末とをZr：Mgが５：５、３：７、あるいは２：８
の体積割合で混合したものとするのが好ましい。In the mixture of these alloys, the mixing ratio of the Zr-based alloy powder is 10 to 50 for more efficient temperature rise.
It is good to set it in the range of%. In particular, Zr: Mg is 5: 5, 3: 7, or 2: 8 for Zr-based alloy powder and Mg-based alloy powder.
It is preferable to mix them in a volume ratio of.
【００１７】水素ガスの供給圧力は、１〜１０kgf/cm2
程度とするのがよい。例えば、1.8 Kgの水素吸蔵合金を
充てんできる容器にこの発明に従う混合物 (Mg2Ni 合金
粉末とZrMn1.95Al0.05合金）を充てんする場合、Mg2Ni
を1167g 使用する場合には、Zr（Mn・Al)2合金として Z
rMn1.95Al0.05 を633 g 、また、Mg2Ni を933 g 使用す
る場合には、上記ZrMn1.95Al0.05を867 g 、また、Mg2N
i を570 g 使用する場合には、上記ZrMn1.95Al0.05を12
30g 使用するようにし、10Kgf/cm2 以下の圧力のもとで
混合物に水素ガスを供給するようにすればよい。The supply pressure of hydrogen gas is 1 to 10 kgf / cm 2.
It is good to set the degree. For example, when a container that can be filled with 1.8 Kg of hydrogen storage alloy is filled with the mixture according to the present invention (Mg 2 Ni alloy powder and ZrMn 1.95 Al 0.05 alloy), Mg 2 Ni
When using 1167g, Zr (Mn ・ Al) 2 alloy as Z
When 633 g of rMn 1.95 Al 0.05 and 933 g of Mg 2 Ni are used, 867 g of ZrMn 1.95 Al 0.05 and Mg 2 N are used.
When using i of 570 g, the above ZrMn 1.95 Al 0.05 is 12
30 g should be used, and hydrogen gas should be supplied to the mixture under a pressure of 10 Kgf / cm 2 or less.
【００１８】[0018]
【実施例】図１に、この発明に従う排ガス浄化用急速加
熱装置の一例を示す。図における番号１は自動車のガソ
リンエンジン、２はエンジン１から排出される排気ガス
の排気経路を形成する排気管であって、この排気管２の
途中にはケース３が配設されていて、このケース３内に
排ガス浄化用の３元触媒４が充てんされる。1 shows an example of a rapid heating apparatus for purifying exhaust gas according to the present invention. Reference numeral 1 in the drawing is a gasoline engine of an automobile, 2 is an exhaust pipe forming an exhaust path of exhaust gas discharged from the engine 1, and a case 3 is arranged in the middle of the exhaust pipe 2. The case 3 is filled with a three-way catalyst 4 for purifying exhaust gas.
【００１９】また、５はケース３の周りを取り囲むよう
に配置されるケースであって、このケース５にはMg系合
金粉末とZr系合金粉末の混合物よりなり、ケース３内の
触媒４を加熱する水素吸蔵合金が充てんされる。Reference numeral 5 denotes a case which is arranged so as to surround the case 3. The case 5 is made of a mixture of Mg-based alloy powder and Zr-based alloy powder and heats the catalyst 4 in the case 3. The hydrogen storage alloy is filled.
【００２０】６はケース５内の水素吸蔵合金へ水素ガス
を供給するための水素ガス供給手段であり、この水素ガ
ス供給手段６は水素ボンベ６ａと、水素ボンベ６ａとケ
ース５とを接続する配管６ｂと、この配管６ｂにの途中
に配置して水素ガスの供給、停止を行う電磁開閉弁６ｃ
からなり、この電磁開閉弁６ｃは自動車エンジンの始動
スイッチ７ ( OFF端子7a,ACC端子7b, ON端子7c,IGN端子
7d) を介してバッテリー８に接続されていて、エンジン
の始動に先立つ電気的な信号の入力により開弁して水素
ガスを水素吸蔵合金を充てんしたケース５内へ供給し
て、触媒の活性化を行わせるべく水素吸蔵合金を発熱さ
せる。Reference numeral 6 is a hydrogen gas supply means for supplying hydrogen gas to the hydrogen storage alloy in the case 5. The hydrogen gas supply means 6 is a hydrogen cylinder 6a and a pipe connecting the hydrogen cylinder 6a and the case 5. 6b, and an electromagnetic on-off valve 6c that is placed in the middle of this pipe 6b to supply and stop hydrogen gas.
This electromagnetic on-off valve 6c consists of a starting switch 7 (OFF terminal 7a, ACC terminal 7b, ON terminal 7c, IGN terminal) of the automobile engine.
7d) is connected to the battery 8 and is opened by the input of an electrical signal prior to the start of the engine to supply hydrogen gas into the case 5 filled with the hydrogen storage alloy to activate the catalyst. The hydrogen storage alloy is caused to generate heat in order to carry out.
【００２１】ケース３内の触媒４を活性化させ、エンジ
ン１の暖気が完了して定常運転が可能になると、図２に
示すように、水素吸蔵合金Ｈ内に貯蔵された水素ガスは
ケース５から所定の圧力になるまで配管６ｂを通して水
素ボンベ６ａに戻され、電磁開閉弁６ｃが閉弁すること
となる。そして閉弁後の水素ボンベ６ａ内には次に水素
吸蔵合金の反応を行わせるのに必要な圧力を有する水素
ガスが貯蔵される。When the catalyst 4 in the case 3 is activated and the warming up of the engine 1 is completed and steady operation becomes possible, the hydrogen gas stored in the hydrogen storage alloy H becomes the case 5 as shown in FIG. To a predetermined pressure, the hydrogen is returned to the hydrogen cylinder 6a through the pipe 6b, and the electromagnetic opening / closing valve 6c is closed. Then, after the valve is closed, hydrogen gas having a pressure necessary to cause a reaction of the hydrogen storage alloy is stored in the hydrogen cylinder 6a.
【００２２】図３および図４に触媒４を充てんするケー
ス３と水素貯蔵合金Ｈを充てんするケース５の要部の構
成を示す。なお、図中Ｈは、充てんした水素吸蔵合金の
粉末である。FIG. 3 and FIG. 4 show the structures of the main part of the case 3 which is filled with the catalyst 4 and the case 5 which is filled with the hydrogen storage alloy H. In the figure, H is the powder of the filled hydrogen storage alloy.
【００２３】ケース３内の触媒４は下半分が金網９によ
って包囲され、上半分が銅材からなる伝熱アダプター10
によって包囲された構造になっている。そして、このケ
ース３の上半分の外周には水素吸蔵合金Ｈを充てんする
ケース５が配置され溶接等によって両者は強固に固定さ
れている。The catalyst 4 in the case 3 has a lower half surrounded by a wire mesh 9 and an upper half made of a copper material.
The structure is surrounded by. A case 5 filled with the hydrogen storage alloy H is arranged on the outer periphery of the upper half of the case 3, and both are firmly fixed by welding or the like.
【００２４】ケース５には、その内部で複数の区画領域
を形成するために縦、横方向に延びる仕切板５ａ，５ｂ
が設けられていて、その区画領域のそれぞれに水素吸蔵
合金Ｈが充てんされる。The case 5 has partition plates 5a and 5b extending in the vertical and horizontal directions so as to form a plurality of partitioned areas therein.
Are provided, and each of the divided areas is filled with the hydrogen storage alloy H.
【００２５】配管６ｂからの水素ガスの供給は、ケース
５のそれぞれの区画領域内で開口するパイプ11を通して
行う。The hydrogen gas is supplied from the pipe 6b through the pipes 11 that open in the respective partitioned areas of the case 5.
【００２６】上記の構成になる装置において、排ガス浄
化用の３元触媒４は以下のような経路を経て活性化され
る。まず、エンジン１の始動に際して可動接点Ｐが始動
スイッチ７のON端子７ｃに接触する (図１, 図２参照)
と電磁開閉弁６ｃが開弁し配管６ｂおよびパイプ11を通
して所定圧になる水素ガスが水素吸蔵合金Ｈの充てんさ
れたケース５内へ供給される。In the apparatus having the above construction, the three-way catalyst 4 for purifying exhaust gas is activated through the following route. First, when the engine 1 is started, the movable contact P contacts the ON terminal 7c of the start switch 7 (see FIGS. 1 and 2).
Then, the electromagnetic on-off valve 6c is opened, and hydrogen gas having a predetermined pressure is supplied into the case 5 filled with the hydrogen storage alloy H through the pipe 6b and the pipe 11.
【００２７】水素ガスが供給されると水素吸蔵合金Ｈは
化学変化して反応熱を発生する。そして、この反応熱は
ケース３および伝熱用アダプター10を介して３元触媒４
を加熱し該触媒４はエンジン始動の初期段階で急速に加
熱、活性化されることとなる。When hydrogen gas is supplied, the hydrogen storage alloy H chemically changes to generate reaction heat. This reaction heat is transferred to the three way catalyst 4 through the case 3 and the heat transfer adapter 10.
The catalyst 4 is rapidly heated and activated in the initial stage of engine starting.
【００２８】1.8 Kgの水素吸蔵合金を充てんできるケー
スにMg2Ni ：1167g とZrMn1.95Al0. 05：633 g の混合物
を充てんして、ここに圧力が10Kgf/cm2 になる水素ガス
を供給した場合における発熱状況を図５に、また、Mg2N
i ：933 g とZrMn1.95Al0.05：867 g との混合物を充て
んして、同じく圧力が10Kgf/cm2 になる水素ガスを供給
した場合における発熱状況を図６に、さらに、Mg2Ni ：
570 g とZrMn1.95Al0. 05：1230g との混合物を充てんし
て圧力が10Kgf/cm2 になる水素ガスを供給した場合にお
ける発熱状況を図７にそれぞれ示す。図５〜図７より明
らかなように、この発明に従う加熱装置によれば触媒を
短時間で活性化できることが明らかである。[0028] 1.8 Kg Mg 2 in case that can fill a hydrogen storage alloy of Ni: 1167g and ZrMn 1.95 Al 0. 05: 633 g mixture was filled to the supply of hydrogen gas the pressure is 10 Kgf / cm 2 here the heating conditions in FIG. 5 in the case where, also, Mg 2 N
i: 933 g and a mixture of ZrMn 1.95 Al 0.05 : 867 g were filled with a mixture of hydrogen gas and a pressure of 10 Kgf / cm 2, and the heat generation was shown in Fig. 6 and Mg 2 Ni:
570 g and ZrMn 1.95 Al 0. 05: pressure filled with a mixture of 1230g is respectively a heating situation in FIG. 7 in the case of supplying a hydrogen gas to be 10 Kgf / cm 2. As is clear from FIGS. 5 to 7, it is clear that the heating device according to the present invention can activate the catalyst in a short time.
【００２９】これに対して、ZrMn1.95Al0.05を単味で18
00g 充てんしたものにおいては、図８に示すように、30
秒経過した時点であってもその温度は200 ℃前後であっ
て、触媒を活性化させることができる温度にまでは達し
ていない。On the contrary, ZrMn 1.95 Al 0.05 is 18
In case of filling with 00g, as shown in FIG.
Even after a lapse of seconds, the temperature was around 200 ° C, which was below the temperature at which the catalyst could be activated.
【００３０】[0030]
【発明の効果】以上説明したように、この発明によれ
ば、電気的なエネルギーを使用することなしに速やかに
触媒を活性化することができるので、大気中へのＨＣや
ＣＯの放出を低減できる。As described above, according to the present invention, the catalyst can be promptly activated without using electric energy, so that the release of HC and CO into the atmosphere is reduced. it can.
【図１】図１はこの発明に従う装置の構成説明図であ
る。FIG. 1 is a structural explanatory view of an apparatus according to the present invention.
【図２】図２はこの発明に従う装置の構成説明図であ
る。FIG. 2 is a structural explanatory view of an apparatus according to the present invention.
【図３】図３はこの発明に従う装置の要部の構成を示し
た図である。FIG. 3 is a diagram showing a configuration of a main part of an apparatus according to the present invention.
【図４】図４はこの発明に従う装置の要部の構成を示し
た図である。FIG. 4 is a diagram showing a configuration of a main part of an apparatus according to the present invention.
【図５】図５はこの発明に従う装置に配置した水素吸蔵
合金の発熱状況を示した図である。FIG. 5 is a diagram showing a heat generation state of the hydrogen storage alloy arranged in the device according to the present invention.
【図６】図６はこの発明に従う装置に配置した水素吸蔵
合金の発熱状況を示した図である。FIG. 6 is a view showing a heat generation state of the hydrogen storage alloy arranged in the device according to the present invention.
【図７】図７はこの発明に従う装置に配置した水素吸蔵
合金の発熱状況を示した図である。FIG. 7 is a diagram showing a heat generation state of the hydrogen storage alloy arranged in the device according to the present invention.
【図８】図８は従来の装置に配置されている水素吸蔵合
金の発熱状況を示した図である。FIG. 8 is a diagram showing a heat generation state of a hydrogen storage alloy arranged in a conventional device.
１ ガソリンエンジン ２ 排気管 ３ ケース ４ ３元触媒 ５ ケース ６ 水素ガス供給手段 ７ 始動スイッチ ８ バッテリー ９ 金網 10 伝熱アダプター 11 パイプ Ｈ 水素吸蔵合金 1 Gasoline engine 2 Exhaust pipe 3 Case 4 3 way catalyst 5 Case 6 Hydrogen gas supply means 7 Start switch 8 Battery 9 Wire mesh 10 Heat transfer adapter 11 Pipe H Hydrogen storage alloy
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０１Ｎ 3/24 ＺＡＢ Ｌ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display area F01N 3/24 ZAB L
Claims (4)
用触媒を加熱して活性化するための水素吸蔵合金と、こ
の水素吸蔵合金に水素ガスを供給して該水素吸蔵合金の
水素化反応により反応熱を発生させる水素ガス供給手段
とを備える装置であって、 上記水素吸蔵合金は、Mg系合金粉末とZr系合金粉末の混
合物よりなる、ことを特徴とする排ガス浄化用触媒の急
速加熱装置。1. A hydrogen storage alloy for heating and activating an exhaust gas purification catalyst provided in an exhaust path of an engine, and hydrogen gas is supplied to this hydrogen storage alloy to carry out a hydrogenation reaction of the hydrogen storage alloy. A device comprising a hydrogen gas supply means for generating heat of reaction, wherein the hydrogen storage alloy comprises a mixture of Mg-based alloy powder and Zr-based alloy powder, a rapid heating device for an exhaust gas purifying catalyst, .
合が、10〜50％である請求項１に記載の装置。2. The apparatus according to claim 1, wherein the volume ratio of the Zr-based alloy powder in the mixture is 10 to 50%.
Al)2合金の粉末である請求項１または２に記載の装置。3. The Zr-based alloy is ZrMn 2 alloy, Zr (Mn.
The device according to claim 1 or 2, which is a powder of Al) 2 alloy.
金, Mg17Mn2 合金の粉末である請求項１に記載の装置。4. The apparatus according to claim 1, wherein the Mg-based alloy is a powder of Mg 2 Ni alloy, MgLa alloy, or Mg 17 Mn 2 alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6042411A JP2790976B2 (en) | 1994-03-14 | 1994-03-14 | Rapid heating device for exhaust gas purifying catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6042411A JP2790976B2 (en) | 1994-03-14 | 1994-03-14 | Rapid heating device for exhaust gas purifying catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07247832A true JPH07247832A (en) | 1995-09-26 |
| JP2790976B2 JP2790976B2 (en) | 1998-08-27 |
Family
ID=12635333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6042411A Expired - Fee Related JP2790976B2 (en) | 1994-03-14 | 1994-03-14 | Rapid heating device for exhaust gas purifying catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2790976B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014065086A1 (en) * | 2012-10-26 | 2014-05-01 | 株式会社豊田自動織機 | Thermal storage device |
| JP2014234706A (en) * | 2013-05-30 | 2014-12-15 | 株式会社豊田自動織機 | Exhaust emission control device |
| JP2015081754A (en) * | 2013-10-24 | 2015-04-27 | 株式会社豊田自動織機 | Chemical heat storage device |
| JP2015081758A (en) * | 2013-10-24 | 2015-04-27 | 株式会社豊田自動織機 | Chemical heat storage device |
| WO2015060199A1 (en) * | 2013-10-24 | 2015-04-30 | 株式会社豊田自動織機 | Chemical heat storage device |
| EP3006882A4 (en) * | 2013-05-28 | 2016-12-28 | Toyota Jidoshokki Kk | Chemical heat storage device |
| EP3012569A4 (en) * | 2013-06-19 | 2017-02-15 | Kabushiki Kaisha Toyota Jidoshokki | Chemical heat storage device |
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| JPS6227534A (en) * | 1985-07-26 | 1987-02-05 | Nippon Yakin Kogyo Co Ltd | Zirconium alloy for hydrogen storage |
| JPH01108341A (en) * | 1987-10-20 | 1989-04-25 | Sanyo Electric Co Ltd | Hydrogen occlusion alloy |
| JPH0247535A (en) * | 1988-08-09 | 1990-02-16 | Mitsubishi Heavy Ind Ltd | Measuring method of unburnt part |
| JPH02301531A (en) * | 1989-05-15 | 1990-12-13 | Sanyo Electric Co Ltd | Manufacture of hydrogen storage alloy |
| JPH0538314U (en) * | 1991-10-30 | 1993-05-25 | 三菱自動車工業株式会社 | Catalyst early activation device |
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1994
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6227534A (en) * | 1985-07-26 | 1987-02-05 | Nippon Yakin Kogyo Co Ltd | Zirconium alloy for hydrogen storage |
| JPH01108341A (en) * | 1987-10-20 | 1989-04-25 | Sanyo Electric Co Ltd | Hydrogen occlusion alloy |
| JPH0247535A (en) * | 1988-08-09 | 1990-02-16 | Mitsubishi Heavy Ind Ltd | Measuring method of unburnt part |
| JPH02301531A (en) * | 1989-05-15 | 1990-12-13 | Sanyo Electric Co Ltd | Manufacture of hydrogen storage alloy |
| JPH0538314U (en) * | 1991-10-30 | 1993-05-25 | 三菱自動車工業株式会社 | Catalyst early activation device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014065086A1 (en) * | 2012-10-26 | 2014-05-01 | 株式会社豊田自動織機 | Thermal storage device |
| JP2014085093A (en) * | 2012-10-26 | 2014-05-12 | Toyota Industries Corp | Heat storage device |
| EP3006882A4 (en) * | 2013-05-28 | 2016-12-28 | Toyota Jidoshokki Kk | Chemical heat storage device |
| US9719390B2 (en) | 2013-05-28 | 2017-08-01 | Kabushiki Kaisha Toyota Jidoshokki | Chemical heat storage device |
| JP2014234706A (en) * | 2013-05-30 | 2014-12-15 | 株式会社豊田自動織機 | Exhaust emission control device |
| EP3012569A4 (en) * | 2013-06-19 | 2017-02-15 | Kabushiki Kaisha Toyota Jidoshokki | Chemical heat storage device |
| JP2015081754A (en) * | 2013-10-24 | 2015-04-27 | 株式会社豊田自動織機 | Chemical heat storage device |
| JP2015081758A (en) * | 2013-10-24 | 2015-04-27 | 株式会社豊田自動織機 | Chemical heat storage device |
| WO2015060199A1 (en) * | 2013-10-24 | 2015-04-30 | 株式会社豊田自動織機 | Chemical heat storage device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2790976B2 (en) | 1998-08-27 |
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