CA1177624A - Hydrogen storage - Google Patents
Hydrogen storageInfo
- Publication number
- CA1177624A CA1177624A CA000372967A CA372967A CA1177624A CA 1177624 A CA1177624 A CA 1177624A CA 000372967 A CA000372967 A CA 000372967A CA 372967 A CA372967 A CA 372967A CA 1177624 A CA1177624 A CA 1177624A
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- Prior art keywords
- hydrogen
- composition
- hydride
- hydridable
- pressure
- 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.)
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Abstract
Abstract A hydrogen storage method and system therefor comprising a novel hydridable composition having the general formula MgxCayNiz where the total of x, y, and z equals one and satisfies the relationships 0 < y ? 0.15 and 0 < z ? 0.15 provided that y/z must be between 1:1 and 1:6. The present invention also includes a source of hydrogen at a temperature and pressure sufficient to hydride the composition and means for heating the hydrided composition to release the hydrogen for use as a source of energy.
Description
1 177~24 HYDROGEN STORAGE
Field of the Invention Broadly, the present invention relates to certain hydridable metal compositions. More particularly, it relates to the use of such metals for the storage of hydrogen as a stable metal hydride which is readily decomposable at relatively low temperatures to release the hydrogen for recovery and use as a source of energy.
Prior Art :
Many nations throughout the world presently consume more energy than they produce. A large portion of the energy consumed is in the form of oil and natural gas, a major portion of which must be imported. The reserves of oil and natural gas in the United States are being rapidly depleted. Thus, the country is becoming even more dependent ; on imported petroleum and may soon have to import significant quantities of natural gas. It has been proposed that hydrogen be produced and used as a source of fuel and as a chemical feedstock to reduce the nation's dependence on petroleum and natural gas.
, The principal source of hydrogen produced in the United ` States comes from the steam-hydrocarbon process wherein a ; hydrocarbon feedstock is reacted with steam to produce a ~; product gas comprising carbon monoxide, hydrogen, and carbon dioxide. A high purity hydrogen product also is obtainable from the electrolysis of water or thermal decomposition of - ~ the water to produce hydrogen and oxygen. Various processes have been suggested for the production of hydrogen. See, for example, U.S. Patent Nos. 3,365,276; 3,83~,550; and , 30 4,105,755.
''I Hydrogen, of course, is not a primary energy source but rather serves as a medium through which a primary energy source such as nuclear, solar, coal or the like can be stored, transmitted and utilized to fill our energy needs.
There are several distinct advantages to the use of hydrogen as an energy medium. It can be made from water (an 1 177~4
Field of the Invention Broadly, the present invention relates to certain hydridable metal compositions. More particularly, it relates to the use of such metals for the storage of hydrogen as a stable metal hydride which is readily decomposable at relatively low temperatures to release the hydrogen for recovery and use as a source of energy.
Prior Art :
Many nations throughout the world presently consume more energy than they produce. A large portion of the energy consumed is in the form of oil and natural gas, a major portion of which must be imported. The reserves of oil and natural gas in the United States are being rapidly depleted. Thus, the country is becoming even more dependent ; on imported petroleum and may soon have to import significant quantities of natural gas. It has been proposed that hydrogen be produced and used as a source of fuel and as a chemical feedstock to reduce the nation's dependence on petroleum and natural gas.
, The principal source of hydrogen produced in the United ` States comes from the steam-hydrocarbon process wherein a ; hydrocarbon feedstock is reacted with steam to produce a ~; product gas comprising carbon monoxide, hydrogen, and carbon dioxide. A high purity hydrogen product also is obtainable from the electrolysis of water or thermal decomposition of - ~ the water to produce hydrogen and oxygen. Various processes have been suggested for the production of hydrogen. See, for example, U.S. Patent Nos. 3,365,276; 3,83~,550; and , 30 4,105,755.
''I Hydrogen, of course, is not a primary energy source but rather serves as a medium through which a primary energy source such as nuclear, solar, coal or the like can be stored, transmitted and utilized to fill our energy needs.
There are several distinct advantages to the use of hydrogen as an energy medium. It can be made from water (an 1 177~4
-2-inexhaustible resource), and, on combustion, water is the main product. Thus, hydrogen can be regarded as a clean, nonpolluting fuel.
The storage of hydrogen does however present certain technological problems. It must be stored either as a pressurized gas with the attendant dangers therein, a cryogenic liquid necessitating refrigeration, or in the form of a metal hydride. The metal hydrides have received the greatest attention as a means of storing hydrogen for vehicular use. Specifically, the ideal hydride would permit the storage of hydrogen at ambient temperatures in a stable compound, but one in which with minimal heating the hydrogen would evolve under sufficient pressure and at ; a sufficient rate to be capable of supplying an adequate supply of fuel, for example, for an automobile engine.
Various metals and combinations thereof have been ~proposed heretofore for use in hydrogen storage, i.e., as ; a metal hydride. For example, it has been suggested that magnesium could be used. However, the direct noncatalyzed conversion of pure solid magnesium to magnesium hydride is reported as being relatively incomplete even at temperatures above 400C and pressures up to 300 atmospheres. It also has been proposed to alloy magnesium with other metals to form intermetallic phases which would catalyze the magnesium-hydrogen reaction, the advantage, of course, lying in the fact that they are permanently incorporated into the system and are effective over many - ffldriding-dehydriding cycles. Copper, nickel and aluminum have been suggested as alloying materials. The ~-30 magnesium-nickel system has the advantage that the hydride is formed at relatively low temperatures and pressures.
However, it has the distinct disadvantage in that it must contain about 10 wt % nickel to store about 7 wt % hydrogen.
;It also has been suggested that a number of intermetallic compounds of a rare earth metal and nickel or cobalt will react directly and reversibly with hydrogen to form a ternary metal hydride. A typical alloy comprising ',~
-l 177~24 LaNi5 will react rapidly with hydrogen at room temperature at a pressure of several tens of atmospheres. When nickel is alloyed with mischmetal (a mixture of rare earth metals), a very unstable hydride is formed with a dissociation pressure of about 10 atmospheres at 0C.
Another group of alloys investigated were the iron-titanium alloys. A typical compound comprises titanium and iron or sometimes a ternary alloy further including manganese. A disadvantage of such alloys is their weight and the fact that their hydrides contain less than about 2 wt ~ hydrogen.
Presently, the most attractive, though not the only, application of the metal hydride would be to couple it with an energy converter such as a fuel cell or an internal combustion engine. In order to be considered for such a use, the candidate hydride must satisfy certain criteria, the most obvious of which involves the hydrogen content of the hydride. Another important concern is the pressure and temperature relationship. For example, very stable hydrides such as zirconium or yttrium would not be useful since they require extremely high temperatures and pressures to effect : a hydriding-dehydriding reaction. Thus, the useful metal hydrides are those which decompose at relatively low ; temperatures, for example, in the range of about 300C or less. In addition, of course, cost and availability are important criteria; for, if the material were in relatively short supply, such supply would soon be exhausted. Also, -- it must be one which is readily reversible between the hydriding-dehydriding reaction such that the direction of the hydriding reaction at a given temperature would depend principally upon the hydrogen pressure. Also, the material should be capable of undergoing a substantial number of hydriding-dehydriding cycles without excessive physical or chemical deterioration. Further, of course, the rate of formation and decomposition of the hydride should be sufficiently rapid to provide the volume of hydrogen required for the end use.
1 177B2d~
Summary of_Invention The present invention provides a hydrogen storage method and system therefor which includes a novel hydridable composition. The composition has the general formula S MgxCayNiz where the total of x, y and z equals one and satisfies the relationships 0< y 50.15 and Oc z S0.15 provided, however, the relationship y/z must be between 1:1 and 1:6. Particularly good results are obtained when the ratio of y/z is about 1:1, 1:3, or 1:5. The preferred value of y and z is from about 0.02 to 0.15.
In accordance with one aspect of the invention, there , also is provided a source of hydrogen at a temperature and pressure sufficient to hydride the composition and further includes means for subsequently heating the hydrided composition to release the hydrogen for use as a source of energy. The compositions of the present invention are readily hydridable and dehydridable at temperatures below 400C and several at temperatures below 300C, thus making them particularly suitable for use as a means of storing , 20 hydrogen as a stable hydride which may be coupled with an internal combustion engine for vehicular applications. It is another advantage of the invention that the hydrided ; composition comprises in excess of 5 wt % hydrogen. It is another advantage of the present invention that the hydrided composition releases its hydrogen at a substantially constant pressure over a wide range of hydrogen concentrations. These and other advantages will be apparent from the following detailed description.
Descri tion of the Preferred Embodiment P
- 30 In accordance with the present invention, there is provided a hydrogen storage method and system therefor. A
key feature of the present invention comprises the storage of hydrogen as a stable hydride at normal ambient conditions, but one which is readily dehydridable to release the hydrogen 3S at a substantially uniform pressure at relatively low temperatures. The hydridable composition of the present ,:
1 177~24 invention has the formula MgxCayNiz, where the total of x, y and z equals one and further satisfies the relationships that both y and z are greater than zero and equal to or less than 0.15. However, in all instances, the relationship y/z must be between 1:1 and 1:6.
The composition of the present invention is readily prepared by placing elemental magnesium and the other selected compounds in a proportion to satisfy the foregoing relationships and thereafter heating the elements above their melting point in a substantially inert atmosphere.
The inert atmosphere may be an inert gas such as argon or helium. Optionally, hydrogen obviously could be used with no detrimental effect other than some of the composition being formed initially as a hydride. Pressure is not critical and may be from as low as 0.5 atmosphere to as high as 100 atmospheres or higher. The temperature required to melt the mixture generally is from about 600-900C.
Where large volumes of the composition are being prepared and the selected element is in massive form, it may be desirable to provide some form of stirring, such as by electromagnetic or mechanical means. However, if the elements are melted as an intimate mixture, stirring generally is not required.
After the composition has been formed, it is allowed to 25 cool and thereafter preferably broken or crushed prior to hydriding. It generally is preferred to break the composition up into particles having an average size - -within the range of from 400 to 800 microns. However, this is not essential. Specifically, when the composition is subsequently reacted with hydrogen, it will form a granular particulate hydride having a nominal paricle size within the ~; range of from about 50 to 20 microns. Crushing the composition prior to hydriding does reduce the time required to form the hydride.
Many uses of the composition of the present invention will be readily apparent to those skilled in the art. For .
1 177f~4 example, when the present composition is hydrided, it forms a readily available source of hydrogen for use in an internal combustion engine. Alternatively, it could be used as a source of hydrogen for a fuel cell or as a source of fuel for a gas turbine.
The various embodiments and preparation of the hydridable composition of the present invention may be more fully understood by reference to the following example thereof.
E W LE
A typical composition of the present invention utilizing calcium was prepared by selecting amounts of magnesium, calcium and nickel to provide a physical admixture to fulfill the equation MgO 92CaO 02Nio 06 and placed in a tantalum crucible. This mixture was heated above the melting point of the elements in an inert helium atmosphere. Thereafter, the fused mixture was cooled, crushed and subjected to hydrogen at elevated pressure and temperature to form the metal hydride. The hydride formed contained 7.4 wt % hydrogen and had a dissociation temperature of 289C at one atmosphere. The activation energy was 18 kcal/mole.
In substantially the same manner, a composition mPriSing MgO 82CaO 03Nio 15 was prepared, hydrided, and dehydrided over several cycles. The activation energy was 17 kcal/mole, the dissociation temperature at one atmosphere was 278C and the hydride contained 6.0 wt %
- hydrogen.
Another composition of the present invention ~as prepared which comprised MgO.88CaO.03NiO.09. This composition also was hydrided and dehydrided over several cycles. The activation energy was 17.4 kcal/mole and the decomposition temperature at one atmosphere was 278C.
The hydride contained 7.2 wt % hydrogen.
It is a particular advantage of the compositions of the present invention that they are readily hydridable at l 177~24 their dissociation temperatures simply by a slight increase in the hydrogen pressure. More particularly, when the compound of the present invention has a dissociation temperature of, for example, 275C and a dissociation pressure of 1 atmosphere, then by slightly increasing the pressure, the reaction is reversed such that the composition reacts with and forms a hydride. Thus, substantially little energy is lost in forming the hydride as opposed to the energy recoverable therefrom.
The foregoing examples readily demonstrate the utility of the present compositions as a means of storing hydrogen in a stable hydride. Further, the present compositions are not poisoned by exposure to the constituents of air.
Indeed, in all the foregoing examples, the compositions were exposed to air prior to being reacted with the hydrogen.
Nonetheless, they were readily hydridable and their hydrogen storage capacity was not diminished. Further, the hydrides so formed are also stable when exposed to the atmosphere.
Thus, it is seen that, after preparation, the compositions have a distinct advantage in that they do not require special handling, for example, in an inert atmosphere.
While the present invention has been described with respect to various specific compositions, it will be readily apparent that a variety of compositions having the general formula and fulfilling the relationships hereinbefore set forth will be equally suitable. Further, although the invention has been described in connection with certain - preferred embodiments, temperatures, pressures and applications thereof, numerous variations will be apparent to those versed in the art. Thus, the present invention should not be considered as limited by the foregoing illustrative example and description. Rather, its scope should be determined in accordance with the following claims.
,:
,.
, .
The storage of hydrogen does however present certain technological problems. It must be stored either as a pressurized gas with the attendant dangers therein, a cryogenic liquid necessitating refrigeration, or in the form of a metal hydride. The metal hydrides have received the greatest attention as a means of storing hydrogen for vehicular use. Specifically, the ideal hydride would permit the storage of hydrogen at ambient temperatures in a stable compound, but one in which with minimal heating the hydrogen would evolve under sufficient pressure and at ; a sufficient rate to be capable of supplying an adequate supply of fuel, for example, for an automobile engine.
Various metals and combinations thereof have been ~proposed heretofore for use in hydrogen storage, i.e., as ; a metal hydride. For example, it has been suggested that magnesium could be used. However, the direct noncatalyzed conversion of pure solid magnesium to magnesium hydride is reported as being relatively incomplete even at temperatures above 400C and pressures up to 300 atmospheres. It also has been proposed to alloy magnesium with other metals to form intermetallic phases which would catalyze the magnesium-hydrogen reaction, the advantage, of course, lying in the fact that they are permanently incorporated into the system and are effective over many - ffldriding-dehydriding cycles. Copper, nickel and aluminum have been suggested as alloying materials. The ~-30 magnesium-nickel system has the advantage that the hydride is formed at relatively low temperatures and pressures.
However, it has the distinct disadvantage in that it must contain about 10 wt % nickel to store about 7 wt % hydrogen.
;It also has been suggested that a number of intermetallic compounds of a rare earth metal and nickel or cobalt will react directly and reversibly with hydrogen to form a ternary metal hydride. A typical alloy comprising ',~
-l 177~24 LaNi5 will react rapidly with hydrogen at room temperature at a pressure of several tens of atmospheres. When nickel is alloyed with mischmetal (a mixture of rare earth metals), a very unstable hydride is formed with a dissociation pressure of about 10 atmospheres at 0C.
Another group of alloys investigated were the iron-titanium alloys. A typical compound comprises titanium and iron or sometimes a ternary alloy further including manganese. A disadvantage of such alloys is their weight and the fact that their hydrides contain less than about 2 wt ~ hydrogen.
Presently, the most attractive, though not the only, application of the metal hydride would be to couple it with an energy converter such as a fuel cell or an internal combustion engine. In order to be considered for such a use, the candidate hydride must satisfy certain criteria, the most obvious of which involves the hydrogen content of the hydride. Another important concern is the pressure and temperature relationship. For example, very stable hydrides such as zirconium or yttrium would not be useful since they require extremely high temperatures and pressures to effect : a hydriding-dehydriding reaction. Thus, the useful metal hydrides are those which decompose at relatively low ; temperatures, for example, in the range of about 300C or less. In addition, of course, cost and availability are important criteria; for, if the material were in relatively short supply, such supply would soon be exhausted. Also, -- it must be one which is readily reversible between the hydriding-dehydriding reaction such that the direction of the hydriding reaction at a given temperature would depend principally upon the hydrogen pressure. Also, the material should be capable of undergoing a substantial number of hydriding-dehydriding cycles without excessive physical or chemical deterioration. Further, of course, the rate of formation and decomposition of the hydride should be sufficiently rapid to provide the volume of hydrogen required for the end use.
1 177B2d~
Summary of_Invention The present invention provides a hydrogen storage method and system therefor which includes a novel hydridable composition. The composition has the general formula S MgxCayNiz where the total of x, y and z equals one and satisfies the relationships 0< y 50.15 and Oc z S0.15 provided, however, the relationship y/z must be between 1:1 and 1:6. Particularly good results are obtained when the ratio of y/z is about 1:1, 1:3, or 1:5. The preferred value of y and z is from about 0.02 to 0.15.
In accordance with one aspect of the invention, there , also is provided a source of hydrogen at a temperature and pressure sufficient to hydride the composition and further includes means for subsequently heating the hydrided composition to release the hydrogen for use as a source of energy. The compositions of the present invention are readily hydridable and dehydridable at temperatures below 400C and several at temperatures below 300C, thus making them particularly suitable for use as a means of storing , 20 hydrogen as a stable hydride which may be coupled with an internal combustion engine for vehicular applications. It is another advantage of the invention that the hydrided ; composition comprises in excess of 5 wt % hydrogen. It is another advantage of the present invention that the hydrided composition releases its hydrogen at a substantially constant pressure over a wide range of hydrogen concentrations. These and other advantages will be apparent from the following detailed description.
Descri tion of the Preferred Embodiment P
- 30 In accordance with the present invention, there is provided a hydrogen storage method and system therefor. A
key feature of the present invention comprises the storage of hydrogen as a stable hydride at normal ambient conditions, but one which is readily dehydridable to release the hydrogen 3S at a substantially uniform pressure at relatively low temperatures. The hydridable composition of the present ,:
1 177~24 invention has the formula MgxCayNiz, where the total of x, y and z equals one and further satisfies the relationships that both y and z are greater than zero and equal to or less than 0.15. However, in all instances, the relationship y/z must be between 1:1 and 1:6.
The composition of the present invention is readily prepared by placing elemental magnesium and the other selected compounds in a proportion to satisfy the foregoing relationships and thereafter heating the elements above their melting point in a substantially inert atmosphere.
The inert atmosphere may be an inert gas such as argon or helium. Optionally, hydrogen obviously could be used with no detrimental effect other than some of the composition being formed initially as a hydride. Pressure is not critical and may be from as low as 0.5 atmosphere to as high as 100 atmospheres or higher. The temperature required to melt the mixture generally is from about 600-900C.
Where large volumes of the composition are being prepared and the selected element is in massive form, it may be desirable to provide some form of stirring, such as by electromagnetic or mechanical means. However, if the elements are melted as an intimate mixture, stirring generally is not required.
After the composition has been formed, it is allowed to 25 cool and thereafter preferably broken or crushed prior to hydriding. It generally is preferred to break the composition up into particles having an average size - -within the range of from 400 to 800 microns. However, this is not essential. Specifically, when the composition is subsequently reacted with hydrogen, it will form a granular particulate hydride having a nominal paricle size within the ~; range of from about 50 to 20 microns. Crushing the composition prior to hydriding does reduce the time required to form the hydride.
Many uses of the composition of the present invention will be readily apparent to those skilled in the art. For .
1 177f~4 example, when the present composition is hydrided, it forms a readily available source of hydrogen for use in an internal combustion engine. Alternatively, it could be used as a source of hydrogen for a fuel cell or as a source of fuel for a gas turbine.
The various embodiments and preparation of the hydridable composition of the present invention may be more fully understood by reference to the following example thereof.
E W LE
A typical composition of the present invention utilizing calcium was prepared by selecting amounts of magnesium, calcium and nickel to provide a physical admixture to fulfill the equation MgO 92CaO 02Nio 06 and placed in a tantalum crucible. This mixture was heated above the melting point of the elements in an inert helium atmosphere. Thereafter, the fused mixture was cooled, crushed and subjected to hydrogen at elevated pressure and temperature to form the metal hydride. The hydride formed contained 7.4 wt % hydrogen and had a dissociation temperature of 289C at one atmosphere. The activation energy was 18 kcal/mole.
In substantially the same manner, a composition mPriSing MgO 82CaO 03Nio 15 was prepared, hydrided, and dehydrided over several cycles. The activation energy was 17 kcal/mole, the dissociation temperature at one atmosphere was 278C and the hydride contained 6.0 wt %
- hydrogen.
Another composition of the present invention ~as prepared which comprised MgO.88CaO.03NiO.09. This composition also was hydrided and dehydrided over several cycles. The activation energy was 17.4 kcal/mole and the decomposition temperature at one atmosphere was 278C.
The hydride contained 7.2 wt % hydrogen.
It is a particular advantage of the compositions of the present invention that they are readily hydridable at l 177~24 their dissociation temperatures simply by a slight increase in the hydrogen pressure. More particularly, when the compound of the present invention has a dissociation temperature of, for example, 275C and a dissociation pressure of 1 atmosphere, then by slightly increasing the pressure, the reaction is reversed such that the composition reacts with and forms a hydride. Thus, substantially little energy is lost in forming the hydride as opposed to the energy recoverable therefrom.
The foregoing examples readily demonstrate the utility of the present compositions as a means of storing hydrogen in a stable hydride. Further, the present compositions are not poisoned by exposure to the constituents of air.
Indeed, in all the foregoing examples, the compositions were exposed to air prior to being reacted with the hydrogen.
Nonetheless, they were readily hydridable and their hydrogen storage capacity was not diminished. Further, the hydrides so formed are also stable when exposed to the atmosphere.
Thus, it is seen that, after preparation, the compositions have a distinct advantage in that they do not require special handling, for example, in an inert atmosphere.
While the present invention has been described with respect to various specific compositions, it will be readily apparent that a variety of compositions having the general formula and fulfilling the relationships hereinbefore set forth will be equally suitable. Further, although the invention has been described in connection with certain - preferred embodiments, temperatures, pressures and applications thereof, numerous variations will be apparent to those versed in the art. Thus, the present invention should not be considered as limited by the foregoing illustrative example and description. Rather, its scope should be determined in accordance with the following claims.
,:
,.
, .
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A hydrogen storage system comprising:
a hydridable composition contained in a housing and having the general formula MgxCayNiz where the total of x, y and z equals one and satisfies the relationships 0 < y ? 0.15 and 0 < z ? 0.15 provided that the ratio of y/z must be between 1:1 and 1:6;
means for providing hydrogen at an elevated temperature and pressure sufficient to hydrogenate said compositions;
means for introducing said heated hydrogen at elevated pressure into said housing to form a hydride of said composition;
means for subsequently heating said hydrided composition to liberate the hydrogen contained therein;
means for reacting the liberated hydrogen with oxygen to generate heat; and means for converting the heat generated to mechanical energy.
a hydridable composition contained in a housing and having the general formula MgxCayNiz where the total of x, y and z equals one and satisfies the relationships 0 < y ? 0.15 and 0 < z ? 0.15 provided that the ratio of y/z must be between 1:1 and 1:6;
means for providing hydrogen at an elevated temperature and pressure sufficient to hydrogenate said compositions;
means for introducing said heated hydrogen at elevated pressure into said housing to form a hydride of said composition;
means for subsequently heating said hydrided composition to liberate the hydrogen contained therein;
means for reacting the liberated hydrogen with oxygen to generate heat; and means for converting the heat generated to mechanical energy.
2. A method of storing hydrogen comprising:
providing a housing containing a hydridable composition having the general formula MgxCayNiz, wherein the total of x, y and z equals one and satisfies the relationships 0 < y ? 0.15 and 0 < z ? 0.15 provided that the relationship y/z must be between 1:1 and 1:6;
reacting said hydridable material with hydrogen at an elevated temperature and a pressure to form a hydride of said composition;
subsequently heating the hydrided composition to liberate the hydrogen; and reacting said liberated hydrogen with oxygen to produce thermal energy.
providing a housing containing a hydridable composition having the general formula MgxCayNiz, wherein the total of x, y and z equals one and satisfies the relationships 0 < y ? 0.15 and 0 < z ? 0.15 provided that the relationship y/z must be between 1:1 and 1:6;
reacting said hydridable material with hydrogen at an elevated temperature and a pressure to form a hydride of said composition;
subsequently heating the hydrided composition to liberate the hydrogen; and reacting said liberated hydrogen with oxygen to produce thermal energy.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13707180A | 1980-04-03 | 1980-04-03 | |
| US137,071 | 1980-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1177624A true CA1177624A (en) | 1984-11-13 |
Family
ID=22475709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000372967A Expired CA1177624A (en) | 1980-04-03 | 1981-03-13 | Hydrogen storage |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1177624A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304260A (en) * | 1989-07-13 | 1994-04-19 | Yoshida Kogyo K.K. | High strength magnesium-based alloys |
| US9234264B2 (en) | 2004-12-07 | 2016-01-12 | Hydrexia Pty Limited | Magnesium alloys for hydrogen storage |
| US9435489B2 (en) | 2010-02-24 | 2016-09-06 | Hydrexia Pty Ltd | Hydrogen release system |
| US11141784B2 (en) | 2015-07-23 | 2021-10-12 | Hydrexia Pty Ltd. | Mg-based alloy for hydrogen storage |
-
1981
- 1981-03-13 CA CA000372967A patent/CA1177624A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304260A (en) * | 1989-07-13 | 1994-04-19 | Yoshida Kogyo K.K. | High strength magnesium-based alloys |
| US9234264B2 (en) | 2004-12-07 | 2016-01-12 | Hydrexia Pty Limited | Magnesium alloys for hydrogen storage |
| US9435489B2 (en) | 2010-02-24 | 2016-09-06 | Hydrexia Pty Ltd | Hydrogen release system |
| US10215338B2 (en) | 2010-02-24 | 2019-02-26 | Hydrexia Pty Ltd. | Hydrogen release system |
| US11141784B2 (en) | 2015-07-23 | 2021-10-12 | Hydrexia Pty Ltd. | Mg-based alloy for hydrogen storage |
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