CN106495095A - A kind of composite hydrolysis hydrogen manufacturing material and hydrogen production process - Google Patents
A kind of composite hydrolysis hydrogen manufacturing material and hydrogen production process Download PDFInfo
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- CN106495095A CN106495095A CN201610943902.8A CN201610943902A CN106495095A CN 106495095 A CN106495095 A CN 106495095A CN 201610943902 A CN201610943902 A CN 201610943902A CN 106495095 A CN106495095 A CN 106495095A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/06—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B6/00—Hydrides of metals including fully or partially hydrided metals, alloys or intermetallic compounds ; Compounds containing at least one metal-hydrogen bond, e.g. (GeH3)2S, SiH GeH; Monoborane or diborane; Addition complexes thereof
- C01B6/06—Hydrides of aluminium, gallium, indium, thallium, germanium, tin, lead, arsenic, antimony, bismuth or polonium; Monoborane; Diborane; Addition complexes thereof
- C01B6/10—Monoborane; Diborane; Addition complexes thereof
- C01B6/13—Addition complexes of monoborane or diborane, e.g. with phosphine, arsine or hydrazine
- C01B6/15—Metal borohydrides; Addition complexes thereof
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- 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
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a kind of composite hydrolysis hydrogen manufacturing material and hydrogen production process, the composite hydrolysis hydrogen manufacturing material component one is sodium borohydride (NaBH4), component two is phosphorus pentoxide (P2O5).The principle of this combination is by water and P2O5Reaction produces phosphoric acid, and then activates NaBH4, it is allowed to release hydrogen with water reaction quick and completely.Relative to traditional transition metal-catalyzed NaBH4The scheme of aqueous solution, new method can realize higher product hydrogen capacity, and cost is lower, using also more convenient.
Description
Technical field
The present invention relates to hydrogen producing technology field, particularly a kind of NEW TYPE OF COMPOSITE hydrolytic hydrogen production material and hydrogen production process.
Background technology
Used as a kind of novel energy, its development receives everybody and greatly pays close attention to hydrogen, and especially hydrogen is in fuel cell
The application of aspect, the even more life to everybody bring very big convenience.But the storage of hydrogen is restriction fuel cell technology
A wide variety of important technology bottleneck.Therefore develop efficient, inexpensive portable hydrogen technology of preparing to fire for promoting
The extensively application of material battery is significant.
For meeting the application demand of portable fuel battery, corresponding original position hydrogen producing technology requires that raw material has higher product hydrogen
Capacity, simultaneous hydrogen production reaction need fast and easy.Using sodium borohydride (NaBH4) hydrolysis quickly and easily can prepare
Go out hydrogen：
NaBH4+4H2O→NaBO2·2H2O+4H2
The hydrogen of release for solid reactant weight 20.8%, is ideal hydrogen production reaction.Therefore NaBH is directed to4
Hydrolytic hydrogen production people conduct extensive research.
NaBH4The greatest problem that hydrolytic hydrogen production faces is NaBH4Very incomplete with water direct reaction, NaBH4Hydrolysis can make molten
Liquid pH value raise, and in alkaline solution NaBH4Can exist with quite stable.In order to solve this problem, common practice
It is to promote NaBH using catalyst4Hydrolysis, custom catalystses include receiving containing transition metals such as Ni, Co, Pt, Ru
Scale particles, such as, in document Journal of Power Sources 125 (2004) 22 26, Kojima et al. is reported
One utilizes NaBH4The device for producing hydrogen of solution, using Pt/LiCoO2NaBH realized by catalyst4The properties of solution, patent
CN104888853-A (publication date 2015.09.09) is using the Ru nano-particle catalysis NaBH being supported on graphene sheet layer4Water
Liberation hydrogen, patent CN104056638-A (publication date 2014.09.24) is using the metal foams such as Ni, Ru catalysis NaBH4Hydrolysis is put
Hydrogen.Similar report has a lot, and its feature is all by NaBH4Solution is configured to NaOH, these nano-particle is supported on solid
On fixed bed reactor, work as NaBH4Hydrogen is released with catalyst by when aqueous solution is contacted.
Although this method can effectively facilitate the releasing of hydrogen, shortcoming is it is also obvious that be mainly manifested in：(1) need
Will first by NaBH4Wiring solution-forming is stored, and is carried and using inconvenience, is caused capacitance loss, the experimental results to show, NaBH4Solution
Concentration is between 10～20%, and needs to add NaOH to make NaBH4Stable (referring to Review literature Fuel Cells, 10
, 335 (2010)～350).(2) transition-metal catalyst is relatively costly, while loss, inactivation occurs during the course of the reaction
Etc. phenomenon.
Although there is the report for promoting preparing hydrogen by sodium borohydride hydrolysis reaction using acid solution before this, hydrogen production efficiency is not
High, it is impossible to be applied in actual production.
In view of this, the special proposition present invention.
Content of the invention
In order to solve traditional transition metal-catalyzed NaBH4The above-mentioned deficiency of aqueous solution hydrogen manufacturing scheme, the invention provides
A kind of new hydrogen manufacturing material, storage, easy to carry, low production cost, moreover it is possible to improve hydrogen production efficiency are environmentally friendly.
The new hydrogen production material that the present invention is provided, is a kind of composite hydrolysis hydrogen manufacturing material, including sodium borohydride (NaBH4) and
Phosphorus pentoxide (P2O5).
The principle of the composite hydrolysis hydrogen manufacturing material is by water and P2O5Reaction produces phosphoric acid, and then activates NaBH4, carry
High and NaBH4The activity of reaction, is allowed to release hydrogen with water reaction quick and completely.
Also document once promoted NaBH using acid solution before this4Hydrolysis, such as in document International
Journal of Hydrogen Energy 34 (2009), in 7231～7238, Akdim et al. was once reported in hydrochloric acid or acetic acid
NaBH in solution4Reaction that can be quick and complete.But compared with existing scheme, the present invention is with notable novelty and more preferably
Implementation result.
From the hydrogen storage capability angle for improving material system, P2O5Advantage be very the P it will be evident that unit mass2O5Produce
Labile protons amount be up to 0.042mol H+/ g, higher than most of solid acid and anhydride, hydrogen production efficiency is greatly improved.
Therefore, P2O5Selection be absolutely not NaBH4The simple extension of acidic hydrolysises, but through optimized choice, and possess non-
The practical value of Chang Chong great.
Preferably, the mol ratio of above-mentioned composite hydrolysis hydrogen manufacturing material, phosphorus pentoxide and sodium borohydride is more than 0:1 is less than
It is equal to 1.0:1.
It is highly preferred that the mol ratio of above-mentioned composite hydrolysis hydrogen manufacturing material, phosphorus pentoxide and sodium borohydride is 0.1:1～
0.4:1
Phosphorus pentoxide adds more, NaBH4Reaction rate faster, while NaBH4Conversion ratio higher, but when five
Aoxidize two phosphorus and NaBH4Mol ratio more than 0.4 when, NaBH4Conversion ratio already exceed 90%, further increase by five oxidation two
The ratio of phosphorus is difficult further to improve NaBH4Conversion ratio, the quality hydrogen content of whole material system can be reduced on the contrary.Therefore exist
In composite hydrolysis hydrogen manufacturing material, the mol ratio of preferably phosphorus pentoxide and sodium borohydride is 0.1:1～0.4:1.
By optimizing P2O5With NaBH4Ratio and control add water amount, it is easy to achieve over 5% quality
Hydrogen output, is very high level in all of hydrogen storage system at present, and produces hydrogen and be easily controlled.
Preferably, above-mentioned composite hydrolysis hydrogen manufacturing material, is solid forms.In actual applications, it is very not to carry acid solution
Easily, only need to carry solid in the present invention, during use, add water, very convenient.Importantly, not all of
Acid can pass through the reaction of solid and water and generate, and for example common hydrochloric acid, nitric acid, sulphuric acid etc. are all by gas and water reaction
Generate, it is impossible to utilized as in the present invention.The acid for having some solids can have similar effect (such as oxalic acid, Fructus Citri Limoniae
Acid etc.), but hydrogen production efficiency is not high.
Preferably, above-mentioned composite hydrolysis hydrogen manufacturing material, phosphorus pentoxide and sodium borohydride are mixed in the form of dried powder
Close, mixed powder storing is in the container for drying sealing.The convenient mixing of the form of powder and storage, and after being conducive to
The continuous control hydrogen production reaction speed that adds water, it is to avoid because of the uneven and caused reaction of water and solid contact not exclusively.
Present invention also offers a kind of hydrogen production process, be to the composite hydrolysis hydrogen manufacturing material described in any of the above in add water
?.This hydrogen production process can realize Portable in-situ hydrogen manufacturing, simple and convenient, and the water of addition can be pure water, it is also possible to
It is tap water or the river of nature, sea water, particular/special requirement, is not applied to the present invention.Water disposably can add
Enter, it is also possible to be gradually added.
Preferably, the mass ratio (H of above-mentioned hydrogen production process, the water of addition and sodium borohydride2O/NaBH4) it is 1:1～5:1.Control
The addition of controlling the water circulation within the range, can be easily achieved the quality hydrogen output more than 5%.
Preferably, above-mentioned hydrogen production process, the coolant-temperature gage of addition is between 10～100 DEG C.The method of the present invention is to coolant-temperature gage
Not do not specially require, as long as the water of liquid can, and the high reaction of water temperature can be fast, therefore controls water temperature at 10～100 DEG C
Under can keep fast hydrogen making, meet the requirement of hydrogen production efficiency.
Preferably, above-mentioned hydrogen production process, the addition speed of water is at the uniform velocity.Deposit between the speed of hydrogen generation and water inlet speed
In proportional relation, the speed size of water inlet is not limited, and can determine water inlet according to practical application to the demand of amounts of hydrogen
Speed.Uniform critically important in the application, the continual and steady power supply of hydrogen fuel cell be ensure that of control hydrogen gas rate.
Preferably, above-mentioned hydrogen production process, adds water in composite hydrolysis hydrogen manufacturing material using peristaltic pump or syringe pump.Theoretical
On, add 1mL water to have 1.24L if being fully converted into hydrogen, even so need the hydrogen flowing quantity of 1000L/min, supplying water
Amount can just meet demand also less than 1L/min with the pump of a very little.Syringe pump and peristaltic pump be two kinds can be more accurate
Control adds water the device of speed.
Heretofore described system quality, is including the whole hydrogen manufacturing materials including water.
Compared with prior art, the invention has the advantages that：
(1) the invention provides a kind of portable hydrogen scheme (hydrogen manufacturing material, method) of high power capacity.Although utilize
NaBH4Hydrolysis hydrogen manufacturing research a lot, but traditional utilization NaBH4The higher actual storage difficult to realize of the method for solution
Hydrogen capacity is converted, and usual quality hydrogen content is all below 2%.And in the present invention, using P2O5Activation NaBH4, in the material for optimizing
5% quality hydrogen output can be achieved under proportioning.The present invention is significant to realizing Portable in-situ hydrogen manufacturing.
(2) in traditional NaBH4In hydrogen production reaction, need using the transition-metal catalysts such as Co, Ni, Pt and NaBH4Solution
Contact catalysis NaBH4Put hydrogen, and only need using cheap P in the present invention2O5, without the need for any transition metal, advantageously reduce material
Material cost, while heavy metal free pollution, product is borate and phosphate, more friendly to environment.
(3) present invention replaces NaBH with solid reactant4Solution, reactant in addition to water are solid, are easy to carry.
(4) the hydrogen manufacturing system will not put hydrogen below 200 DEG C automatically, can be stored with long-term safety.
Description of the drawings
Product hydrogen dynamic curve diagrams of the Fig. 1 for embodiment 1.
Fig. 2 is difference P in embodiment 22O5With NaBH4NaBH in the case of mol ratio4Conversion ratio and system quality hydrogen contain
Amount.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to specific embodiment to this
Bright it is described in further detail.
Embodiment 1
NaBH43.80g (0.100mol), P2O51.30g (0.0092mol), in a dry environment with agate mortar
Two kinds of powder mulls are mixed, and are loaded glass reactor, 25 are slowly added to using Miniature injection pump with the speed of 0.70mL/min
DEG C water, that is, produce hydrogen, water injection time continues 10min, altogether water filling 7.00mL, and system uniformly puts hydrogen, and the hydrogen of generation leads to
Gas flowmeter measurement is crossed, hydrogen 7.4L is produced altogether, the quality hydrogen storage content of whole material system reaches 5.2%.Produce the dynamic of hydrogen
Force diagram is as shown in Figure 1.
Embodiment 2
Fixed NaBH4Consumption is 3.80g, changes P2O5Consumption, P2O5With NaBH4Molar ratio range be to be less than more than 0
0.4 is equal to, loads glass reactor.Water is uniformly added into using Miniature injection pump, the speed that adds water is 0.50mL/min, fixed addition
The total amount of water is 7.5mL.The amount that the hydrogen for producing is measured using gas flowmeter.Optimize whole material system (including NaBH4、
P2O5And add water) quality hydrogen content, as a result as shown in Figure 2.In P2O5With NaBH4When mol ratio reaches 0.1, NaBH4
Very high conversion ratio is can reach, further increases P2O5Consumption can reduce overall hydrogen content on the contrary.After optimized proportion when
P2O5With NaBH4When mol ratio is 0.1, more than 5.5% quality hydrogen content can be reached.
Specific case used herein is set forth to the principle of the present invention and embodiment, and above example is said
The bright core concept for being only intended to help understand the present invention.It should be pointed out that for those skilled in the art,
Under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these improve and modify
Fall in the protection domain of the claims in the present invention.
Claims (10)
1. a kind of composite hydrolysis hydrogen manufacturing material, it is characterised in that including sodium borohydride and phosphorus pentoxide.
2. composite hydrolysis hydrogen manufacturing material according to claim 1, it is characterised in that phosphorus pentoxide and sodium borohydride rub
Your ratio is more than 0:1 is less than or equal to 1.0:1.
3. composite hydrolysis hydrogen manufacturing material according to claim 2, it is characterised in that phosphorus pentoxide and sodium borohydride rub
You are than being 0.1:1～0.4:1.
4. composite hydrolysis hydrogen manufacturing material according to claim 1, it is characterised in that for solid forms.
5. composite hydrolysis hydrogen manufacturing material according to claim 4, it is characterised in that phosphorus pentoxide and sodium borohydride with
The form mixing of dried powder, mixed powder storing is in the container for drying sealing.
6. a kind of hydrogen production process, it is characterised in that add in the arbitrary described composite hydrolysis hydrogen manufacturing material of Claims 1 to 5
Water.
7. hydrogen production process according to claim 6, it is characterised in that the water of addition is 1 with the mass ratio of sodium borohydride:1
～5:1.
8. hydrogen production process according to claim 6, it is characterised in that the coolant-temperature gage of addition is between 10～100 DEG C.
9. hydrogen production process according to claim 6, it is characterised in that the addition speed of water is at the uniform velocity.
10. hydrogen production process according to claim 6, it is characterised in that using peristaltic pump or syringe pump to composite hydrolysis system
Water is added in hydrogen material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110713170A (en) * | 2019-10-17 | 2020-01-21 | 浙江高成绿能科技有限公司 | Hydrogen production method by hydrolysis of borohydride by using water vapor |
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| CN201154898Y (en) * | 2007-11-28 | 2008-11-26 | 汉能科技有限公司 | Hydrogen making device from borohydride |
| CN104787721A (en) * | 2015-04-15 | 2015-07-22 | 成都瑞顶特科技实业有限公司 | Hydrolysis hydrogen production agent |
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- 2016-11-02 CN CN201610943902.8A patent/CN106495095B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201154898Y (en) * | 2007-11-28 | 2008-11-26 | 汉能科技有限公司 | Hydrogen making device from borohydride |
| CN104787721A (en) * | 2015-04-15 | 2015-07-22 | 成都瑞顶特科技实业有限公司 | Hydrolysis hydrogen production agent |
Non-Patent Citations (1)
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| 王玉晓: "硼氢化钠制氢技术在质子交换膜燃料电池中的研究进展", 《化工进展》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110713170A (en) * | 2019-10-17 | 2020-01-21 | 浙江高成绿能科技有限公司 | Hydrogen production method by hydrolysis of borohydride by using water vapor |
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Address after: 215500 No. 88 Xianshi Road, Changshu High-tech Industrial Development Zone, Suzhou City, Jiangsu Province, 6 1001 blocks Patentee after: Suzhou Mingde Hydrogen Energy Technology Co., Ltd. Address before: Room 107-14, Floor 1, 127-1 North Street, Zhongguancun, Haidian District, Beijing Patentee before: Beijing pleasant virtue is radically reformed Science and Technology Development Co., Ltd. |
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Effective date of registration: 20200731 Address after: 215500 602, building 6, No. 88, Xianshi Road, Changshu high tech Industrial Development Zone, Suzhou City, Jiangsu Province Patentee after: Suzhou Qingde Hydrogen Energy Technology Co., Ltd Address before: 215500 No. 88 Xianshi Road, Changshu High-tech Industrial Development Zone, Suzhou City, Jiangsu Province, 6 1001 blocks Patentee before: Suzhou Mingde Hydrogen Energy Technology Co.,Ltd. |
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