Hydrogen storage

metal hydride tanks
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decriptionDescription

Metal hydride tank is a container loading with hydrogen storage alloy powder, heat exchange parts, and gas transport components. The container body materials are generally aluminum alloy or stainless steel. Our hydrogen storage vessels are based on AB5 metal hydride alloys. Hydrogen being stored at low pressure in the vessel, they provide a safe and reliable energy storage, particularly for portable applications, in-house and in-board storage.

Individual vessels can be combined in arrays to reach specific H2 volumes and discharge rates. Contact us for custom-built hydrogen storage.

Chose your storage depending on the quantity of hydrogen you wish to store. The number in the product name refers to the quantity of normal liters of gas kept in the vessel (for instance, the MH150 tank can store up to 150NL of hydrogen). Typical uses of the tanks include fuel cell power, gas chromatography and lab experiments/chemical reactions.

The performance of a metal hydride tank mainly includes the following aspects:
. Capacity — how much hydrogen can be stored, generally indicated as in standard liters NL;
. Releasing rate — the rate that hydrogen is released from the tank. A sufficient heat supply is required for hydrogen releasing. The rate is determined by the type of metal hydride, efficiency of heat exchange as well as gas transport resistance;
. Recharging time — time that used to refueling the tank;
. Cycle life — the cycle number that the tank can be refueled without a significant degradation in capacity.

The main features of the metal hydride tank:
. High storage density;
. Capability of low temperature releasing
. Quick locking;
. Flexibility in tank size;
. Body materials: stainless steel or aluminum alloy

decriptionSafety
Metal hydride tanks are ideal for indoor use thanks to their low storage pressure.
However the user should consider the volume of the room where the vessel is stored compared to the volume of hydrogen stored. Hydrogen has a Lower Flammable Limit (LFL) of 4% diluted in air. We recommend that the uncompressed total volume of hydrogen stored does not exceed 2% (half of the LFL) of the total volume of the room.

Our tanks are delivered filled with argon to comply with air transportation security rules. Therefore, they need to be charged before being usable.

ExperimentsHow does metal hydride tanks work
Storage Mechanism
Hydrogen is stored in the form of so-called “metal hydride”.
Most metals or alloys can react with hydrogen to form new compounds, which are named as metal hydrides. The formation of metal hydride is an exothermic process associated with heat releasing. With sufficient heat supply, hydrogen can be released from the as-formed metal hydride. Such a reversible reaction process can be expressed as follows:

2/nM + H2 = 2/nMHn +ΔH

where M-metal or alloy; MHn-metal hydride; ΔH-thermal effect associated with the reaction. Pressure and temperature changed, the reaction will take place alternatively and hydrogen will be absorbed or desorbed.

h2 storage

Atoms of hydrogen, under low temperature or high pressure, can enter the holes of crystalline of the parent metal or alloy, forming solid solution — α phase; then reaction between hydrogen and metal will continue to form the new phase — β phase. The above figure is the simple model of hydrogen atoms locating on the grid of metals.

Thermodynamic
From the thermodynamics point of view, the enthalpy associated with the formation reaction of metal hydride reflects the strength of the metal-hydrogen bond in the metal hydride phase. The relationship among the pressure, temperature and composition is generally described by a Pressure—Composition—Isotherm plot, namely PCI curve.

h2 storage

In this figure, the sloping part on the left side is for α—phase region. Both α and β phases coexist in the middle region and only β—phase is present on the right side. The pressure relative to the middle flat region is called the equilibrium plateau pressure.
The relationship between pressure and temperature is described by the Van’t Hoff equation:

LnPH2 = ΔH0/RT – ΔS0/R

Where ΔH0 and ΔS0 are the enthalpy and entropy of the hydrogen absorption reaction, “R” the gas constant and “T” the absolute temperature. This relationship can be verified experimentally by carrying out PCI measurements on a material at several temperatures. Adopting the Van’t Hoff relationship and PCI curve, it is possible to determine the enthalpy and entropy of the metal and hydrogen equilibrium.

Type of metal hydrides
From the engineering point of view, three types of metal hydrides mostly used, which are listed as follows.
– AB type: Ti-Fe-C, Ti-Fe-Ca, Ti-Fe, Ta, Ti-Fe-Mm,…
– AB2 type: Ti-Cr-Fe, Ti-Zr-Cr-Fe, Ti-Zr-Cr-Fe-Mn-Cu, Ti-Mn-V, Ti-Zr-Mn-V-Fe,…
– AB5 type: Ca-Mm-Ni-Al, Mm-Ni-Mn-Co,…

MH10 hydrogen tank

MH10
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decriptionDescription
The MH10 is perfect for portable applications of small devices, portable fuel cells (head lamps, power buffers, micro gensets,…)

Compact and light weight many can fit in pockets or bags.

It stores 30Wh, the equivalent energy of 10 AA batteries for half the weight. And it can be fully recharged in 10 minutes more than 2000 times!

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications :

Dimensions: Ø19 x L82 mm
Weight: 112g
Storage capacity: 10NL (standard liter)
Vessel material: Aluminum
Type of connectors: Quick coupling with 4mmOD tube
Charging pressure: 1MPa
Discharge pressure: 0.2MPa (@20°C)
Flow rate: 0.1NL/min (@25°C)
Heat supply: air convection

MH20 hydrogen tank

MH20
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decriptionDescription
The MH20 is perfect for portable applications of small devices, portable fuel cells (head lamps, power buffers, micro gensets,…)

Compact and light weight many can fit in pockets or bags.

It stores 60Wh, the equivalent energy of 20 AA batteries for two-third of the weight. And it can be fully recharged in 20 minutes more than 2000 times!

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications :

Dimensions: Ø20 x L158 mm
Weight: 350g
Storage capacity: 20NL (standard liter)
Vessel material: stainless steel
Type of connectors: Quick coupling with 4mmOD tube, self sealing both male+female
Charging pressure: 1MPa
Discharge pressure: 0.2MPa (@20°C)
Flow rate: 0.5NL/min (@25°C)
Heat supply: air convection

MH150 hydrogen tank

MH150
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decriptionDescription
The MH150 is perfect for fuelling portable applications, transportable gensets or chemical analysis as gas chromatography. Using ambient air convection to release H2, it is very simple to operate.

It stores 450Wh of energy, the same amount of a 14kg lead-acid battery (nearly ten times the weight of the tank!). It can be fully recharged in 30 minutes more than 2000 times!

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications :

Dimensions: Ø54 x L180 mm
Weight: 1.6 kg
Storage capacity: 150NL (standard liter)
Vessel material: aluminum alloy
Type of connectors: Swagelok Quick coupling
Charging pressure: 2MPa
Discharge pressure: 0.3MPa (@20°C)
Flow rate: 0.5NL/min (@25°C)
Heat supply: air convection
Recharge time ≤ 30 min (20°C water bath)


MH300a hydrogen tank

MH300a
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decriptionDescription

The MH300a is perfect for fuelling portable and transportable gensets, small automotive application or chemical analysis as gas chromatography. Using ambient air convection to release H2, it is very simple to operate.

It stores 900Wh of energy, the same amount of 28kg of lead-acid batteries (nearly ten times the weight of the tank!). It can be fully recharged in 30 minutes more than 2000 times!

We have two form factors for the MH300, the MH300a is longer and thinner than the MH300b. Same weight.

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications :

Dimensions: Ø47 x L360 mm
Weight: 3 kg
Storage capacity: 300NL (standard liter)
Vessel material: Stainless steel
Type of connectors: Swagelok Quick coupling
Charging pressure: 2MPa
Discharge pressure: 0.3MPa (@20°C)
Flow rate: 2-3NL/min (@25°C)
Heat supply: air convection
Recharge time ≤ 30 min (20°C water bath)


MH300b hydrogen tank

MH300b
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decriptionDescription
The MH300b is perfect for fuelling portable and transportable gensets, small automotive application or chemical analysis as gas chromatography. Using ambient air convection to release H2, it is very simple to operate.

It stores 900Wh of energy, the same amount of 28kg of lead-acid batteries (nearly ten times the weight of the tank!). It can be fully recharged in 30 minutes more than 2000 times!

We have two form factors for the MH300, the MH300b is shorter and wider than the MH300a. Same weight.

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications :

Dimensions: Ø59 x L230 mm
Weight: 3 kg
Storage capacity: 300NL (standard liter)
Vessel material: Stainless steel
Type of connectors: Swagelok Quick coupling
Charging pressure: 2MPa
Discharge pressure: 0.3MPa (@20°C)
Flow rate: 2NL/min (@25°C)
Heat supply: air convection
Recharge time ≤ 30 min (20°C water bath)


MH500 hydrogen tank

MH500
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decriptionDescription
The MH500 is perfect for fuelling portable and transportable gensets, small automotive application or chemical analysis as gas chromatography. Using ambient air convection to release H2, it is very simple to operate.

It stores 1500Wh of energy, the same amount of 46kg of lead-acid batteries (nearly ten times the weight of the tank!). It can be fully recharged in 30 minutes more than 2000 times!

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications:

Dimensions: Ø59 x L370 mm
Weight: 5 kg
Storage capacity: 500NL (standard litre)
Vessel material: Stainless steel
Type of connectors: Swagelok Quick coupling
Charging pressure: 2 MPa
Discharge pressure: 0.3 MPa (@20°C)
Flow rate: 3 NL/min (@25°C air convection)
7 NL/min (@20°C water bath)
Heat supply: air convection or water bath
Recharge time ≤ 30 min (20°C water bath)


MH600 hydrogen tank

MH600
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decriptionDescription
The MH600 is perfect for fuelling transportable gensets, small automotive application or chemical analysis as gas chromatography. Using ambient air convection to release H2, it is very simple to operate.

It stores 1800Wh of energy, the same amount of 56kg of lead-acid batteries (nearly ten times the weight of the tank!). It can be fully recharged in 30 minutes more than 2000 times!

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications:

Dimensions: 50x105x420 mm
Weight: 6.5 kg
Storage capacity: 600NL (standard litre)
Vessel material: Stainless steel
Type of connectors: Swagelok Quick coupling
Charging pressure: 2 MPa
Discharge pressure: 0.3 MPa (@20°C)
Flow rate: 2-3 NL/min (@25°C air convection)
5 NL/min (@20°C water bath)
Heat supply: air convection or water bath
Recharge time ≤ 30 min (20°C water bath)


MH1500 Hydrogen tank

MH500
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decriptionDescription
The MH1500 is perfect for fuelling fuel cell power generators, small automotive application or chemical analysis as gas chromatography. Using ambient air convection to release H2, it is very simple to operate.

It stores 4500Wh of energy, the same amount of 140kg of lead-acid batteries (ten times the weight of the tank!). It can be fully recharged in 45 minutes more than 2000 times!

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications:

Dimensions: Ø145 x L284 mm
Weight: 12 kg
Storage capacity: 1500NL (standard litre)
Vessel material: Stainless steel
Type of connectors: Swagelok Quick coupling
Charging pressure: 2 MPa
Discharge pressure: 0.2 to 0.5 MPa (H)
0.2 to 1 MPa (L)
Flow rate: 4 NL/min (@25°C air convection)
Heat supply: air convection
Recharge time ≤ 45 min (20°C water bath)


MH2000 Hydrogen tank

MH2000
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decriptionDescription
The MH2000 is perfect for fuelling fuel cell power generators, small automotive application or chemical analysis as gas chromatography. Using ambient air convection to release H2, it is very simple to operate.

It stores 6000Wh of energy, the same amount of 190kg of lead-acid batteries (nearly ten times the weight of the tank!). It can be fully recharged in 45 minutes more than 2000 times!

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications:

Dimensions: 480x180x180 mm
Weight: 25 kg
Storage capacity: 2000NL (standard litre)
Vessel material: Stainless steel
Type of connectors: Swagelok Quick coupling
Charging pressure: 2 MPa
Discharge pressure: 0.3 MPa
Flow rate: 4 NL/min (@25°C air convection)
30 NL/min (water bath)
Heat supply: air convection or water bath
Recharge time ≤ 45 min (20°C water bath)


MH5000 Hydrogen tank

MH5000
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decriptionDescription
The MH5000 is perfect for fuelling fuel cell power generators, fuel cell automotive applications or chemical analysis as gas chromatography. Very safe, it stores a large amount of hydrogen at low pressure.

It stores 15KWh of energy, the same amount of 470kg of lead-acid batteries (more than six times the weight of the tank!). It can be fully recharged in 45 minutes more than 5000 times!

The vessel is equiped with a casing to allow water flow over the hydride chambers.

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications:

Dimensions: ∅169 x L1100 mm
Weight: 76 kg
Storage capacity: 5000NL (standard litre)
Vessel material: Stainless steel
Type of connectors: Swagelok Quick coupling
Charging pressure: 2 MPa
Discharge pressure: 2 to 5 barg (H)
2 to 10 barg (L)
Flow rate: 25 NL/min (@20°C water bath)
Heat supply: water bath
Recharge time ≤ 45 min (20°C water bath)


MH7000 Hydrogen tank

MH7000
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decriptionDescription
The MH7000 is perfect for fuelling fuel cell power generators, fuel cell automotive applications or chemical analysis as gas chromatography. Very safe, it stores a large amount of hydrogen at low pressure.

It stores 21KWh of energy, the same amount of 660kg of lead-acid batteries (more than six times the weight of the tank!). It can be fully recharged in 45 minutes more than 5000 times!

The vessel is equiped with a casing to allow water flow over the hydride chambers.

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications:

Dimensions: ∅169 x L1650 mm
Weight: 98 kg
Storage capacity: 7000NL (standard litre)
Vessel material: Stainless steel
Type of connectors: Swagelok Quick coupling
Charging pressure: 2 MPa
Discharge pressure: 2 to 5 barg (H)
2 to 10 barg (L)
Flow rate: 25 NL/min (@20°C water bath)
Heat supply: water bath
Recharge time ≤ 45 min (20°C water bath)


MH10M hydrogen tank

MH10M
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decriptionDescription
The MH10M (or MH10000) is perfect for fuelling fuel cell power generators or chemical analysis as gas chromatography. Very safe, it stores a large amount of hydrogen at low pressure.

It stores 30KWh of energy, the same amount of 930kg of lead-acid batteries (more than six times the weight of the tank!). It can be fully recharged in 45 minutes more than 2000 times!

The vessel is equiped with for wheels to move it easily in your lab environment.

decriptionKey features
– High storage density
– Capability of low temperature releasing
– Quick locking
– Compact and light weight
decriptionTechnical Specifications:

Dimensions: 755x430x395 mm
Weight: 150 kg
Storage capacity: 10,000NL (standard litre)
Vessel material: aluminum alloy
Type of connectors: Swagelok Quick coupling
Charging pressure: 2 MPa
Discharge pressure: 0.3 MPa
Flow rate: 20 NL/min (@25°C air convection)
80 NL/min (@20°C water bath)
Heat supply: Air convection or water bath
Recharge time ≤ 45 min (20°C water bath)


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