CN105112945A - Method for preparing hydrogen production aluminum-gallium alloy by utilizing molten salt electrolysis codeposition - Google Patents
Method for preparing hydrogen production aluminum-gallium alloy by utilizing molten salt electrolysis codeposition Download PDFInfo
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- CN105112945A CN105112945A CN201510598357.9A CN201510598357A CN105112945A CN 105112945 A CN105112945 A CN 105112945A CN 201510598357 A CN201510598357 A CN 201510598357A CN 105112945 A CN105112945 A CN 105112945A
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- gallium alloy
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Abstract
The invention discloses a method for preparing a hydrogen production aluminum-gallium alloy and belongs to the field of hydrogen production alloys. The method comprises the steps of grinding and placing a mixture of NaF, AlF3, Al2O3 and Ga2O3 in a graphite crucible, performing heat insulation for 2 h at 300 DEG C in the argon protective atmosphere, removing remaining moisture, taking graphite as an anode, taking inert metal or graphite as a cathode, rising the temperature to 880-1000 DEG C to perform heat insulation, performing powering on electrolysis, maintaining voltage of an electrolytic tank at 2.5-5.0, performing electrolysis for 5-10 h and then performing cooling under argon protection to room temperature, taking the aluminum-gallium alloy out of the graphite crucible in the argon protective atmosphere, placing the aluminum-gallium alloy in a sealed ball-milling tank filled with argon to perform ball milling, and obtaining aluminum alloy powder. The hydrogen production aluminum-gallium alloy is directly prepared by adopting a molten salt electrolysis process, the smelting process is omitted, and the hydrogen production aluminum-gallium alloy preparation cost is reduced greatly. The prepared aluminum-gallium alloy can react continuously with water at 40 DEG C to generate hydrogen.
Description
Technical field
The invention belongs to and produce hydrogen alloy field, be specifically related to a kind of preparation method producing hydrogen aluminum gallium alloy, this alloy can react with water and produce hydrogen.
Background technology
The popularization of Hydrogen Energy is mainly subject to the restrictions such as hydrogen producing technology, storing technology and transportation technology.Current industrial hydrogen adopts fossil oil hydrogen manufacturing and water electrolysis hydrogen production method to produce, and hydrogen production efficiency is not high, needs the at substantial energy and environmental pollution is larger.The storage of hydrogen and transport also constrain the application of hydrogen.If adopt liquifying method storage and transport, the small liquid factory of liquefaction capacity 100kg/h must expend 40 ~ 60MJ electric energy to the 1kg hydrogen that liquefies, and spent energy may exceed its liquefaction hydrogen contained energy; Even if capacity reaches the large-scale liquefaction factory of 10000kg/h, liquefaction also needs to expend its liquefaction hydrogen contained energy 30%, so large energy expend the increase bringing cost.Hydrogen container itself is very heavy, even if be filled with hydrogen in hold-up vessel, the hydrogen of storage also only accounts for 5% ~ 7% of whole hold-up vessel quality, therefore, adds hydrogen transportation cost with hydrogen container storage and transport.Hydrogen density is little, easily reveals, and there is potential safety hazard.Aluminium alloy hydrogen producing technology is the mode of more practical, very promising storage and transportation of hydrogen gas, has wide practical use.Such as, replace gasoline as the fuel of car combustion engine with aluminium alloy hydrogen manufacturing, its hydrogen manufacturing cost has competitive power compared with gasoline, and its unique waste of discharging is water, can not produce any pollution.Aluminium alloy hydrogen manufacturing is also highly suitable for undersea boat, because do not discharge toxic gas, does not damage the health of ship person.In hydrogen manufacturing aluminium alloy, aluminum gallium alloy is one of good alloy of hydrogen manufacturing performance.Current product hydrogen aluminum alloy Preparation Method is mainly raw material high melt and ball milling under inert gas atmosphere with pure metal, and melting and ball milling need lot of energy.
Summary of the invention
For overcoming the deficiencies in the prior art, technical problem to be solved by this invention is to provide a kind of method preparing product hydrogen aluminum gallium alloy, to deducting the high melt step prepared at present and produce in hydrogen aluminum gallium alloy process, reduces the production cost of product hydrogen aluminum gallium alloy.
In order to solve above technical problem, the present invention is achieved by the following technical programs.
The present invention is by NaF, AlF
3, Al
2o
3and Ga
2o
3plumbago crucible is put in mixture grinding; under argon atmosphere, 300 DEG C are incubated 2 hours; the moisture that removing is residual; using graphite as anode; inert metal (Mo, W or Pt) or graphite are as negative electrode; temperature is increased to 880-1000 DEG C to be incubated; energising electrolysis; keep bath voltage 2.5 ~ 5.0V; electrolysis, after 5 ~ 10 hours, is cooled to room temperature under argon shield, in argon atmosphere, takes out aluminum gallium alloy from plumbago crucible; the ball grinder being full of argon gas aluminum gallium alloy being put into sealing carries out ball milling, obtains Al alloy powder.
NaF and AlF in above-mentioned ionogen
3mol ratio be 2.6 ~ 2.0:1; Al
2o
3quality be NaF and AlF
33 ~ 5%, Ga of quality sum
2o
3quality is Al
2o
34 ~ 20% of quality, in gained aluminum gallium alloy, the content of gallium is 0.5 ~ 12%.
A small amount of MgF can be added in electrolyte system of the present invention
2, CaF
2etc. the temperature reducing electrolysis.
The present invention adopts ICP elemental analysis method to analyze the composition of aluminum gallium alloy.Aluminium alloy prepared by the present invention can to react with water at 40 DEG C and produce hydrogen with speed faster, 1.0 grams of aluminum gallium alloy powder are put into the water of 1000 grams 40 DEG C, the hydrogen of generation is imported one to be filled in the bottle of water, hydrogen enters the water of rear discharge same volume, produces the volume of hydrogen by weighing the Weight computation of discharging water.
Compared with prior art, the present invention has following technique effect:
1, the present invention adopts fused salt electrolysis process directly to prepare and produces hydrogen aluminium alloy, will save fusion process, and greatly reduce the preparation cost producing hydrogen aluminum gallium alloy;
2, the aluminum gallium alloy prepared by the present invention, can prepare hydrogen at 40 DEG C with water sustained reaction.Alloy ball milling in argon atmosphere becomes alloy powder, and hydrogen-producing speed is greatly improved.
Embodiment
With specific examples, content of the present invention is described further below, but the present invention is not limited to following embodiment.
Embodiment 1
By NaF, AlF
3, Al
2o
3and Ga
2o
3plumbago crucible is put in mixture grinding, and under argon atmosphere, 300 DEG C are incubated 2 hours, the moisture that removing is residual; NaF and AlF
3mol ratio be 2.6, Al
2o
3and Ga
2o
3quality be NaF, AlF respectively
35% of quality sum and 0.8%; Using graphite as anode; Mo is as negative electrode; temperature is increased to 1000 DEG C to be incubated; energising electrolysis, keep bath voltage 5.0V, electrolysis is after 10 hours; room temperature is cooled under argon shield; in argon atmosphere, take out aluminum gallium alloy from plumbago crucible, the ball grinder being full of argon gas aluminum gallium alloy being put into sealing carries out ball milling, obtains Al alloy powder.
Analyze the composition of aluminum gallium alloy by ICP elemental analysis method, in this alloy, the content of gallium is 12%.This aluminium alloy can to react with water at 40 DEG C and produce hydrogen with speed faster, 1.0 grams of aluminum gallium alloy powder is put into the water of 1000 grams 40 DEG C, within 10 minutes, can produce hydrogen 980 milliliters, within 60 minutes, can produce hydrogen 1045 milliliters.
Embodiment 2
By NaF, AlF
3, Al
2o
3and Ga
2o
3plumbago crucible is put in mixture grinding, and under argon atmosphere, 300 DEG C are incubated 2 hours, the moisture that removing is residual; NaF and AlF
3mol ratio be 2.3, Al
2o
3and Ga
2o
3quality be NaF, AlF respectively
34% of quality sum and 0.4%; Using graphite as anode; W is as negative electrode; temperature is increased to 940 DEG C to be incubated; energising electrolysis, keep bath voltage 4.0V, electrolysis is after 8 hours; room temperature is cooled under argon shield; in argon atmosphere, take out aluminum gallium alloy from plumbago crucible, the ball grinder being full of argon gas aluminum gallium alloy being put into sealing carries out ball milling, obtains Al alloy powder.
Analyze the composition of aluminum gallium alloy by ICP elemental analysis method, in this alloy, the content of gallium is 8%.This aluminium alloy can to react with water at 40 DEG C and produce hydrogen with speed faster, 1.0 grams of aluminum gallium alloy powder is put into the water of 1000 grams 40 DEG C, within 10 minutes, can produce hydrogen 960 milliliters, within 60 minutes, can produce hydrogen 1085 milliliters.
Embodiment 3
By NaF, AlF
3, Al
2o
3and Ga
2o
3plumbago crucible is put in mixture grinding, and under argon atmosphere, 300 DEG C are incubated 2 hours, the moisture that removing is residual; NaF and AlF
3mol ratio be 2.1, Al
2o
3and Ga
2o
3quality be NaF, AlF respectively
33% of quality sum and 0.3%; Using graphite as anode; graphite is as negative electrode; temperature is increased to 920 DEG C to be incubated; energising electrolysis, keep bath voltage 3.0V, electrolysis is after 6 hours; room temperature is cooled under argon shield; in argon atmosphere, take out aluminum gallium alloy from plumbago crucible, the ball grinder being full of argon gas aluminum gallium alloy being put into sealing carries out ball milling, obtains Al alloy powder.
Analyze the composition of aluminum gallium alloy by ICP elemental analysis method, in this alloy, the content of gallium is 7%.This aluminium alloy can to react with water at 40 DEG C and produce hydrogen with speed faster, 1.0 grams of aluminum gallium alloy powder is put into the water of 1000 grams 40 DEG C, within 10 minutes, can produce hydrogen 950 milliliters, within 60 minutes, can produce hydrogen 1095 milliliters.
Embodiment 4
By NaF, AlF
3, Al
2o
3and Ga
2o
3plumbago crucible is put in mixture grinding, and under argon atmosphere, 300 DEG C are incubated 2 hours, the moisture that removing is residual; NaF and AlF
3mol ratio be 2.0, Al
2o
3and Ga
2o
3quality be NaF, AlF respectively
34% of quality sum and 0.16%; Using graphite as anode; Pt is as negative electrode; temperature is increased to 880 DEG C to be incubated; energising electrolysis, keep bath voltage 2.5V, electrolysis is after 5 hours; room temperature is cooled under argon shield; in argon atmosphere, take out aluminum gallium alloy from plumbago crucible, the ball grinder being full of argon gas aluminum gallium alloy being put into sealing carries out ball milling, obtains Al alloy powder.
Analyze the composition of aluminum gallium alloy by ICP elemental analysis method, in this alloy, the content of gallium is 3%.This aluminium alloy can to react with water at 40 DEG C and produce hydrogen with speed faster, 1.0 grams of aluminum gallium alloy powder is put into the water of 1000 grams 40 DEG C, within 10 minutes, can produce hydrogen 990 milliliters, within 60 minutes, can produce hydrogen 1075 milliliters.
Claims (1)
1. fused salt electrolysis codeposition prepares a method of producing hydrogen aluminum gallium alloy, it is characterized in that: the method adopts the AlF of melting
3, NaF, Al
2o
3and Ga
2o
3mixture is ionogen, and under argon gas atmosphere protection, carry out electrolysis, make anode with graphite, using inert metal or graphite as negative electrode, molten salt system temperature is 880-1000 DEG C, and bath voltage is 2.5 ~ 5.0V, and after electrolysis 5 ~ 10h, cooling obtains aluminum gallium alloy;
NaF and AlF in described ionogen
3mol ratio be 2.6 ~ 2.0:1; Al
2o
3quality be NaF and AlF
33 ~ 5%, Ga of quality sum
2o
3quality is Al
2o
34 ~ 20% of quality.
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|---|---|---|---|
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1769536A (en) * | 2005-10-13 | 2006-05-10 | 郑州大学 | Preparation method of multicomponent microalloying aluminium alloy containing titanium, zirconium and scandium |
| JP2009173974A (en) * | 2008-01-22 | 2009-08-06 | Kobelco Kaken:Kk | Alloy for hydrogen generation, hydrogen generation method and fuel cell |
| CN101613082A (en) * | 2008-06-27 | 2009-12-30 | 北京化工大学 | A kind of manufacture method of producing the aluminium alloy of hydrogen |
-
2015
- 2015-09-18 CN CN201510598357.9A patent/CN105112945A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1769536A (en) * | 2005-10-13 | 2006-05-10 | 郑州大学 | Preparation method of multicomponent microalloying aluminium alloy containing titanium, zirconium and scandium |
| JP2009173974A (en) * | 2008-01-22 | 2009-08-06 | Kobelco Kaken:Kk | Alloy for hydrogen generation, hydrogen generation method and fuel cell |
| CN101613082A (en) * | 2008-06-27 | 2009-12-30 | 北京化工大学 | A kind of manufacture method of producing the aluminium alloy of hydrogen |
Non-Patent Citations (1)
| Title |
|---|
| MENG-CHANG LIN ET AL: "Fabrication of AlLi and Al2Li3/Al4Li9 intermetallic compounds by molten salt electrolysis and their application for hydrogen generation from water", 《INTERNATIONAL JOURNAL OF HYDROGEN ENERGY》 * |
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