JPH0224761B2 - - Google Patents
Info
- Publication number
- JPH0224761B2 JPH0224761B2 JP59166480A JP16648084A JPH0224761B2 JP H0224761 B2 JPH0224761 B2 JP H0224761B2 JP 59166480 A JP59166480 A JP 59166480A JP 16648084 A JP16648084 A JP 16648084A JP H0224761 B2 JPH0224761 B2 JP H0224761B2
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen storage
- storage alloy
- container
- hydrogen
- high viscosity
- 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.)
- Expired - Lifetime
Links
- 239000001257 hydrogen Substances 0.000 claims description 64
- 229910052739 hydrogen Inorganic materials 0.000 claims description 64
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 61
- 229910045601 alloy Inorganic materials 0.000 claims description 43
- 239000000956 alloy Substances 0.000 claims description 43
- 239000007788 liquid Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 10
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229940057995 liquid paraffin Drugs 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 150000004681 metal hydrides Chemical class 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C11/00—Use of gas-solvents or gas-sorbents in vessels
- F17C11/005—Use of gas-solvents or gas-sorbents in vessels for hydrogen
-
- 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
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydrogen, Water And Hydrids (AREA)
- Powder Metallurgy (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、耐圧水素容器から水素吸蔵合金を取
り出す方法に係り、特に、微粉末化した水素吸蔵
合金を安全に取り出すことのできる水素吸蔵合金
の取り出し方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for taking out a hydrogen storage alloy from a pressure-resistant hydrogen container, and in particular, a method for taking out a hydrogen storage alloy that can safely take out a finely powdered hydrogen storage alloy. Regarding the method.
従来技術
水素吸蔵合金（例えばLaNi5の希土類―Ni合
金等）は多量の水素を可逆的に吸収、放出する性
質を有するので、クリーンエネルギー源としての
水素を貯蔵する水素貯蔵材として有望視されてい
る。また、水素を吸収、放出する際に生じる反応
熱が大きいことから、蓄熱材としても有望視され
ている。このような水素吸蔵合金は、水素圧力下
で水素吸収、放出反応を起こすので、通常は耐圧
容器内に充填して使用され、また、水素吸収、放
出を繰り返すことにより微粉末化して表面積が増
大する傾向にある。Prior Art Hydrogen storage alloys (such as rare earth-Ni alloys such as LaNi 5 ) have the property of reversibly absorbing and releasing large amounts of hydrogen, so they are considered promising as hydrogen storage materials for storing hydrogen as a clean energy source. There is. In addition, because the heat of reaction generated when absorbing and releasing hydrogen is large, it is seen as a promising material as a heat storage material. Such hydrogen-absorbing alloys undergo hydrogen absorption and release reactions under hydrogen pressure, so they are usually used by being filled in a pressure-resistant container, and by repeating hydrogen absorption and release, they are pulverized and their surface area increases. There is a tendency to
このため、水素吸収、放出を多数回繰り返した
後の水素吸蔵合金は反応性が高く、空気中へ直接
さらすと急激な酸化反応等により粉塵爆発を起こ
す危険性のあることが報告されている（「水素貯
蔵用金属水素化物の爆発危険性」、高圧ガス、
Vol.17、No.６、pp297〜304（1980）参照）。 For this reason, it has been reported that hydrogen storage alloys that have undergone hydrogen absorption and release many times are highly reactive, and that there is a risk of dust explosions due to rapid oxidation reactions when exposed directly to the air ( "Explosion hazard of metal hydrides for hydrogen storage", high pressure gas,
(See Vol. 17, No. 6, pp. 297-304 (1980)).
したがつて、耐圧水素容器をメンテナンスした
り、材料を交換する作業は非常に危険が伴なうこ
とになる。 Therefore, the work of maintaining pressure-resistant hydrogen containers and replacing materials is extremely dangerous.
そこで、微粉末化した水素吸蔵合金を耐圧水素
容器から安全に取り出すためには、取り出す前に
耐圧水素容器に不活性ガスや二酸化炭素等の気体
を導入し、水素吸蔵合金粉末の反応性を低下させ
る方法が考えられるが、かかる方法によつても微
粉末状の水素吸蔵合金の飛散による粉塵爆発等の
危険性は除去されない。 Therefore, in order to safely take out the finely powdered hydrogen storage alloy from the pressure-resistant hydrogen container, an inert gas or gas such as carbon dioxide is introduced into the pressure-resistant hydrogen container before taking it out to reduce the reactivity of the hydrogen storage alloy powder. However, even this method does not eliminate the risk of dust explosions caused by scattering of the finely powdered hydrogen storage alloy.
目 的
本発明は、上述した従来技術の欠点を除き、水
素吸蔵合金を容器外へ安全に取り出し、耐圧水素
容器のメンテナンスおよび材料の交換作業を容易
にすることができる水素吸蔵合金の取り出し方法
を提供することを目的とする。Purpose The present invention provides a method for removing a hydrogen storage alloy that can safely remove the hydrogen storage alloy from the container and facilitate maintenance and material replacement of a pressure-resistant hydrogen container, while eliminating the drawbacks of the prior art described above. The purpose is to provide.
構 成
このため本発明は、水素の吸収と放出を繰り返
した水素吸蔵合金を充填した容器を加熱するとと
もに減圧して上記水素吸蔵合金中の残存水素を十
分に放出させ、この容器に不揮発性の高粘度液体
を注入して上記水素吸蔵合金をこの高粘度液体に
浸漬してスラリー状にした後、上記容器を大気に
解放して高粘度液体を固化し、固化した高粘度液
体とともに水素吸蔵合金を容器外へ排出するよう
にしたことを特徴としている。Structure For this reason, the present invention heats a container filled with a hydrogen storage alloy that has repeatedly absorbed and released hydrogen, and reduces the pressure to sufficiently release the residual hydrogen in the hydrogen storage alloy, and fills the container with a non-volatile material. After injecting a high viscosity liquid and immersing the hydrogen storage alloy in the high viscosity liquid to form a slurry, the container is released to the atmosphere to solidify the high viscosity liquid, and together with the solidified high viscosity liquid, the hydrogen storage alloy The feature is that the liquid is discharged outside the container.
即ち、微粉末化した水素吸蔵合金の活性を低下
させて反応を抑制するため、微粉末化した水素吸
蔵合金の表面を覆い空気との接触を断つたととも
に、水素吸蔵合金の微粉末が飛散しないように粘
度の高い不揮発性の液体に浸漬し、さらに、その
液体を固化させる。 That is, in order to reduce the activity of the pulverized hydrogen storage alloy and suppress the reaction, the surface of the pulverized hydrogen storage alloy is covered to cut off contact with air and the fine powder of the hydrogen storage alloy is not scattered. It is immersed in a highly viscous non-volatile liquid, and then the liquid is solidified.
このような使用目的に適合する液体としては、
例えば鉱油、流動パラフイン、水ガラス等の反応
性が低く、不揮発性で、かつ粘度の高い液体があ
る。 Liquids suitable for this purpose include:
Examples include mineral oil, liquid paraffin, water glass, and other liquids that have low reactivity, are nonvolatile, and have high viscosity.
また、例えばシアノアクリル系接着剤等の空気
中の水分等で硬化する液体を用いることもでき
る。この場合は、その液体を微粉末化した水素吸
蔵合金の容器に注入し、この容器を大気に開放し
て注入した液体中に水素吸蔵合金の微粉末を固化
させ、この後に容器外に取り出すようにすればよ
い。 Further, it is also possible to use a liquid that hardens with moisture in the air, such as a cyanoacrylic adhesive. In this case, pour the liquid into a container made of a finely powdered hydrogen storage alloy, open the container to the atmosphere, solidify the fine hydrogen storage alloy powder in the poured liquid, and then take it out of the container. Just do it.
さらに、例えばフエノール系あるいはエポキシ
系の接着剤と硬化剤の組合せのように、混合する
ことによつて硬化する２種類以上の液体を用いる
こともできる。この場合は、これらの液体を微粉
末化した水素吸蔵合金の容器に注入し、液体が硬
化して水素吸蔵合金の微粉末を固化した後に、容
器を大気に開放して容器外へ排出すればよい。 Furthermore, it is also possible to use two or more types of liquids that are cured by mixing, such as a combination of a phenolic or epoxy adhesive and a curing agent. In this case, if these liquids are poured into a container made of finely powdered hydrogen storage alloy, and after the liquid hardens and the fine powder of hydrogen storage alloy is solidified, the container is opened to the atmosphere and discharged outside the container. good.
実施例
内容量約３の耐圧水素容器に、水素吸蔵合金
としてLaNi5合金を約１Kg充填し、水素加圧
10atm（温度25℃）および加熱・減圧（温度90℃、
圧力0.1atm以下）の操作を繰り返してLaNi5合金
に水素吸収、放出を行なわせた。この操作を約30
回繰り返した後、以下のようにして水素吸蔵合金
の取り出しを行なつた。Example: A pressure-resistant hydrogen container with a capacity of about 3 is filled with about 1 kg of LaNi 5 alloy as a hydrogen storage alloy, and hydrogen is pressurized.
10atm (temperature 25℃) and heating/depressurization (temperature 90℃,
The LaNi 5 alloy was made to absorb and release hydrogen by repeating the operation at a pressure of 0.1 atm or less. This operation takes about 30
After repeating this process several times, the hydrogen storage alloy was taken out as follows.
まず、耐圧水素容器を約90℃に加熱するととも
に約0.1torrに減圧して、水素吸蔵合金から残存
水素を放出させた。ついで、減圧した状態の耐圧
水素容器内に流動パラフインを約１注入し、一
昼夜放置した。そして、その後耐圧水素容器から
スラリー状になつたLaNi5合金粉末を取り出し
た。 First, a pressure-resistant hydrogen container was heated to about 90°C and the pressure was reduced to about 0.1 torr to release residual hydrogen from the hydrogen storage alloy. Next, approximately one portion of liquid paraffin was poured into a pressure-resistant hydrogen container under reduced pressure, and the container was left overnight. Then, the slurry-like LaNi 5 alloy powder was taken out from the pressure-resistant hydrogen container.
このとき、取り出したLaNi5合金はスラリー状
になつているため、微粉末化したLaNi5合金の飛
散は見られなかつた。また、取り出したスラリー
状のLaNi5合金層の温度の経時変化を調べたとこ
ろ、取り出してから約10時間経過しても常温付近
にあり、大きな変動はなく急激な酸化反応は見ら
れなかつた。 At this time, since the LaNi 5 alloy taken out was in the form of a slurry, no scattering of the finely powdered LaNi 5 alloy was observed. In addition, when we investigated the temperature change over time of the slurry-like LaNi 5 alloy layer that we took out, we found that it remained at room temperature even after about 10 hours had passed since it was taken out, with no major fluctuations and no rapid oxidation reaction.
効 果
以上説明したように、本発明によれば、微粉末
化した水素吸蔵合金の表面が高粘度の液体で完全
に覆われた状態で、その液体中に固定されるた
め、水素吸蔵合金の活性が大きく低下し、その結
果、従来、大気と接触した場合に生じる急激な酸
化反応が未然に防止される。また、微粉末化した
水素吸蔵合金の飛散がほとんどなく、大気中で粉
塵爆発等が生じる危険性がなくなる。この結果、
水素吸収、放出を繰り返した水素吸蔵合金を安全
にしかも容易に取り出すことができるようになる
ことから、耐圧水素容器のメンテナンスおよび材
料の交換等を容易にすることができ、高価な耐圧
水素容器を有効に再生利用することができるよう
になる。Effects As explained above, according to the present invention, the surface of the finely powdered hydrogen storage alloy is completely covered with a high viscosity liquid and is fixed in the liquid. The activity is greatly reduced, so that the rapid oxidation reactions that conventionally occur upon contact with the atmosphere are obviated. In addition, there is almost no scattering of the finely powdered hydrogen storage alloy, eliminating the risk of dust explosions occurring in the atmosphere. As a result,
Since hydrogen storage alloys that have repeatedly absorbed and released hydrogen can be safely and easily taken out, maintenance and material replacement of pressure-resistant hydrogen containers can be facilitated, and expensive pressure-resistant hydrogen containers can be replaced. It becomes possible to reuse it effectively.
Claims (1)
と放出を繰り返した水素吸蔵合金を取り出す水素
吸蔵合金の取り出し方法において、前記容器を加
熱するとともに減圧して前記水素吸蔵合金中の残
存水素を十分に放出させ、この容器に不揮発性の
高粘度液体を注入し、前記水素吸蔵合金をその高
粘度液体に浸漬してスラリー状にした後に前記容
器を大気に開放して前記高粘度液体を固化し、そ
の固化した高粘度液体とともに水素吸蔵合金を容
器外へ排出させることを特徴とする水素吸蔵合金
の取り出し方法。 ２ 特許請求の範囲第１項記載において、前記高
粘度液体は、空気中の水分によつて硬化する液体
であることを特徴とする水素吸蔵合金の取り出し
方法。 ３ 特許請求の範囲第１項記載において、前記高
粘度液体は、混合すると硬化する２種類以上の液
体であることを特徴とする水素吸蔵合金の取り出
し方法。[Scope of Claims] 1. In a method for taking out a hydrogen storage alloy that has repeatedly absorbed and released hydrogen from a container filled with a hydrogen storage alloy, the container is heated and depressurized to remove the hydrogen storage alloy from the hydrogen storage alloy. After sufficiently releasing the remaining hydrogen, a non-volatile high viscosity liquid is poured into the container, and the hydrogen storage alloy is immersed in the high viscosity liquid to form a slurry, after which the container is opened to the atmosphere and the high viscosity liquid is poured into the container. A method for taking out a hydrogen storage alloy, characterized by solidifying a viscous liquid and discharging the hydrogen storage alloy together with the solidified high viscosity liquid out of a container. 2. The method for extracting a hydrogen storage alloy according to claim 1, wherein the high viscosity liquid is a liquid that hardens with moisture in the air. 3. The method for extracting a hydrogen storage alloy according to claim 1, wherein the high viscosity liquid is two or more types of liquids that harden when mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59166480A JPS6145199A (en) | 1984-08-10 | 1984-08-10 | Method of taking out hydrogen occlusion alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59166480A JPS6145199A (en) | 1984-08-10 | 1984-08-10 | Method of taking out hydrogen occlusion alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6145199A JPS6145199A (en) | 1986-03-05 |
| JPH0224761B2 true JPH0224761B2 (en) | 1990-05-30 |
Family
ID=15832178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59166480A Granted JPS6145199A (en) | 1984-08-10 | 1984-08-10 | Method of taking out hydrogen occlusion alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6145199A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4534738B2 (en) * | 2004-12-03 | 2010-09-01 | トヨタ自動車株式会社 | Hydrogen storage container processing system and processing method |
| JP5384921B2 (en) * | 2008-12-03 | 2014-01-08 | 株式会社神戸製鋼所 | Hydrogen purification method and hydrogen storage alloy reaction vessel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5738302A (en) * | 1980-08-12 | 1982-03-03 | Agency Of Ind Science & Technol | Absorbing and releasing method for hydrogen using metal |
| JPS5849601A (en) * | 1981-09-16 | 1983-03-23 | Matsushita Electric Ind Co Ltd | Recovery of metallic material for hydrogen storage |
-
1984
- 1984-08-10 JP JP59166480A patent/JPS6145199A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5738302A (en) * | 1980-08-12 | 1982-03-03 | Agency Of Ind Science & Technol | Absorbing and releasing method for hydrogen using metal |
| JPS5849601A (en) * | 1981-09-16 | 1983-03-23 | Matsushita Electric Ind Co Ltd | Recovery of metallic material for hydrogen storage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6145199A (en) | 1986-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |