EP3368816A1 - Conteneur pour stockage d'ammoniac - Google Patents
Conteneur pour stockage d'ammoniacInfo
- Publication number
- EP3368816A1 EP3368816A1 EP16787829.7A EP16787829A EP3368816A1 EP 3368816 A1 EP3368816 A1 EP 3368816A1 EP 16787829 A EP16787829 A EP 16787829A EP 3368816 A1 EP3368816 A1 EP 3368816A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- solid medium
- volume
- grains
- gas
- 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.)
- Withdrawn
Links
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
Definitions
- the invention relates to gas storage containers, including ammonia, embedded in motor vehicles.
- ammonia is injected into a vehicle exhaust pipe in the gas phase according to a selective catalytic reduction process also known by the acronym SCR (selective catalytic reduction). ). Ammonia reduces nitrogen oxides to water and nitrogen.
- Ammonia is stored in the vehicle in a container.
- the container comprises a rigid envelope and a solid medium formed of grains of material capable of storing ammonia in the gas phase by absorption and to release it by desorption. Desorption occurs when the solid medium is heated. During absorption, the volume of the solid medium increases while during desorption, the volume of the solid medium decreases. When the ammonia is absorbed by the solid medium, the volume of the latter increases to reach between 2.8 and 5 times its initial volume.
- the solid medium is for example a salt.
- the container is sized to accommodate the solid medium when it reaches its maximum volume. This is why, when using the vehicle, when the ammonia is desorbed by the solid medium, its volume decreases and a game is installed in the container. The vibrations generated by the movement of the vehicle then impact the solid medium in the container. Thus, as ammonia desorption and absorption cycles progressively, the solid medium disintegrates and ends up no longer forming a coherent solid medium but, on the contrary, a powder. It is then no longer able to absorb ammonia with its initial capacity. It is therefore necessary to renew the solid medium.
- An object of the invention is to provide a more reliable ammonia storage container.
- the invention provides a gas storage container for an onboard system of a motor vehicle comprising:
- a solid medium formed of grains of material arranged with respect to one another in an initial configuration, capable of storing the gas by absorption while increasing in volume and to release the gas by desorption while decreasing in volume,
- the container being characterized in that it comprises means of contention able to maintain the grains of material arranged with respect to one another in a configuration close to their initial configuration after several cycles increasing and decreasing the volume of the solid medium.
- the solid medium thus retains the same structure, notwithstanding the successive changes in volume. It therefore retains its coherent shape as and absorption cycles and desorption through the means of contention.
- the restraining means maintains the configuration of the material grains of the solid medium by avoiding the formation of empty volumes between the grains of material.
- void volumes we mean volumes (or spaces) devoid of grains of matter.
- the restraining means comprise an elastic structure for confining the solid medium.
- confinement is meant that the elastic structure completely envelops (i.e. traps) the solid medium in both the absorption cycles and the desorption cycles.
- the elastic structure acts as a confinement pocket in which the solid medium is trapped.
- the elastic structure is able to withstand many cycles of absorption and desorption.
- the container comprises means for heating the solid medium.
- the heating means comprise a rod intended to be housed within the solid medium.
- the rod forms a gas flow duct capable of placing in fluid communication the inside and the outside of the container.
- the solid medium comprises a salt, preferably strontium chloride or barium chloride or calcium chloride.
- the solid medium comprises a stack of salt layers, at least one layer of material whose thermal conductivity is greater than that of the salt being disposed between two salt layers, the material preferably comprising expanded natural graphite.
- the rigid envelope has a substantially cylindrical shape.
- the container is for storing ammonia.
- an onboard vehicle system comprising at least one container as described above, the container being connected in fluid communication with a vehicle exhaust duct.
- FIG. 1 is an exploded perspective view of a container according to a first embodiment of the invention
- FIG. 2 is a sectional view along a plane parallel to a longitudinal axis of the container according to this first embodiment of the invention
- FIG. 3 is a schematic representation of the container
- FIG. 4 is an exploded perspective view of a container according to a second embodiment of the invention.
- FIG. 5 is an exploded perspective view of a container according to a third embodiment of the invention.
- FIG. 6 is a perspective view of this container
- FIG. 7 is a sectional and perspective view of a container according to a fourth embodiment of the invention.
- FIG. 8 is an exploded perspective view of a container according to a fifth embodiment of the invention.
- FIG. 9 is a sectional view along a plane parallel to a longitudinal axis of the container according to this fifth embodiment of the invention.
- FIG. 1 shows a container 10 for storing gas for an onboard system of a motor vehicle.
- the container 10 is intended to store ammonia.
- the container 10 comprises a rigid sleeve 12 which has a substantially cylindrical shape and has, at one of its longitudinal ends, a circular opening 14.
- the container 10 also comprises an elastic structure 16, a solid medium 18 and heating means 20.
- the solid medium 18 comprises a succession of layers stacked on each other.
- the solid medium 18 comprises successively, along a longitudinal axis, a layer comprising expanded natural graphite 22 and a layer comprising a salt 24.
- a salt 24 is a salt of strontium chloride.
- This material has the property of storing gaseous ammonia in its pores and releasing it when it is heated increasing and then decreasing its volume. Its ability to retain ammonia is thus inversely proportional to the temperature.
- the salt comprises barium chloride or calcium chloride or a mixture of these three salts. More generally, any solid substrate capable of storing ammonia may be used. Expanded natural graphite has a higher thermal conductivity than salt. Thus, by arranging it between two salt layers, it ensures a homogeneous heating of the solid medium 18 formed of layers of expanded natural graphite 22 and salt layers 24.
- solid medium 18 formed by salt and expanded natural graphite, comprises grains of material arranged relative to one another in an initial configuration.
- the solid medium 18 is able to store the gas, in this case ammonia, by absorption, increasing in volume and releasing the gas by desorption, decreasing in volume.
- the solid medium 18 can see its volume reach up to 5 times its initial volume when it stores ammonia gas.
- the heating means 20 comprise a rod 26 and at the base of this rod 26 a lid 28.
- the rod 26 is hollow and opens out on an orifice 30 at the center of the lid 28.
- the rod 26 is housed within the solid medium 18 and thus ensures a homogeneous heating of the solid medium 18.
- the rod 26 is hollow and opening on an orifice 30, it forms a gas flow duct capable of placing fluid communication inside and outside. of the container 10.
- the elastic structure 16 is therefore impervious to gaseous ammonia.
- the ammonia released by the solid medium 18 gains the exhaust pipe of the vehicle via the rod 26.
- the elastic structure 16 may be constituted by a porous material vis- with ammonia gas, such as a braid or extensible filter structure.
- the ammonia released by the salt passes through the walls of the elastic structure 16 and gains the exhaust pipe of the vehicle by micros porosity. This filtering and extensible structure can also be heating.
- the restraining means have a Young's modulus significantly greater than that of the solid medium.
- the cover 28 and the rigid sleeve 12 form a rigid envelope of substantially cylindrical shape.
- the elastic structure 16 is intended to confine the solid medium 18. It thus forms a means of contention.
- the elastic structure 16 is able to maintain the material grains 22, 24 of the solid medium 18 arranged with respect to one another in a configuration close to their initial configuration after several cycles of increase and decreasing the volume of the solid medium.
- the elastic structure 16 is thus able to follow the evolution of the volume of the solid medium 18 in particular to prevent empty volumes appear between the material grains of the solid medium 18.
- the container 10 is intended to be connected to an exhaust duct of the vehicle.
- FIG. 4 shows a second embodiment of the invention.
- the numerical references of the elements common with the first embodiment are unchanged. Only the differences with this first embodiment will be mentioned.
- FIGS. 5 and 6 show a third embodiment of the invention.
- a seal 32 is positioned between the cover 28 and the rigid sleeve 12.
- the cover 28 and the rigid sleeve 12 carry complementary bayonet-type positioning means.
- FIG. 7 shows a fourth embodiment of the invention.
- the container 10 has a shape, in a plane perpendicular to its longitudinal axis, trapezoidal.
- FIGS. 8 and 9 show a fifth embodiment.
- the container 10 according to this embodiment is close to that of the third embodiment.
- the cover 28 and the rigid sleeve 12 carry complementary positioning means of the cam lock type.
- Any type of positioning means may be used between the cover 28 and the rigid sleeve 12.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1560365A FR3043163B1 (fr) | 2015-10-29 | 2015-10-29 | Conteneur pour stockage d'ammoniac. |
| PCT/EP2016/075751 WO2017072153A1 (fr) | 2015-10-29 | 2016-10-26 | Conteneur pour stockage d'ammoniac |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3368816A1 true EP3368816A1 (fr) | 2018-09-05 |
Family
ID=54783923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16787829.7A Withdrawn EP3368816A1 (fr) | 2015-10-29 | 2016-10-26 | Conteneur pour stockage d'ammoniac |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3368816A1 (fr) |
| FR (1) | FR3043163B1 (fr) |
| WO (1) | WO2017072153A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484262B (zh) * | 2022-02-11 | 2022-11-08 | 中国科学院上海微系统与信息技术研究所 | 一种杜瓦瓶 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3338879C2 (de) * | 1983-10-24 | 1986-11-13 | Mannesmann AG, 4000 Düsseldorf | Druckgasbehälter |
| WO2013130401A1 (fr) * | 2012-02-29 | 2013-09-06 | Luon Energy Llc | Dispositifs d'adsorption de gaz naturel |
| WO2014023841A1 (fr) * | 2012-08-09 | 2014-02-13 | Aaqius & Aaqius Sa | Unite de stockage d'ammoniac et structure et systeme associes |
| EP2695859B1 (fr) * | 2012-08-09 | 2015-09-16 | Aaqius & Aaqius S.A. | Structure de stockage d'ammoniac et systèmes et procédé associés |
| FR3004515B1 (fr) * | 2013-04-10 | 2016-12-02 | Ad Venta | Compensateur de contraintes pour reservoir d'hydrogene a base d'hydrure metallique |
-
2015
- 2015-10-29 FR FR1560365A patent/FR3043163B1/fr not_active Expired - Fee Related
-
2016
- 2016-10-26 WO PCT/EP2016/075751 patent/WO2017072153A1/fr not_active Ceased
- 2016-10-26 EP EP16787829.7A patent/EP3368816A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR3043163A1 (fr) | 2017-05-05 |
| FR3043163B1 (fr) | 2018-05-18 |
| WO2017072153A1 (fr) | 2017-05-04 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20180529 |
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| AK | Designated contracting states |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BELKHELFA, YAZID Inventor name: MADOUX, DOMINIQUE |
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| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
Effective date: 20181219 |