CN101905320B - Copper powder dry water for improving gas storage rate of hydrate and preparation method and application thereof - Google Patents
Copper powder dry water for improving gas storage rate of hydrate and preparation method and application thereof Download PDFInfo
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- CN101905320B CN101905320B CN2010102299787A CN201010229978A CN101905320B CN 101905320 B CN101905320 B CN 101905320B CN 2010102299787 A CN2010102299787 A CN 2010102299787A CN 201010229978 A CN201010229978 A CN 201010229978A CN 101905320 B CN101905320 B CN 101905320B
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Abstract
The invention discloses copper powder dry water for improving the gas storage rate of hydrate and a preparation method and application thereof. The copper powder dry water consists of hydrophobic fumed silica, copper powder and water, wherein the hydrophobic fumed silica accounts for 5 to 15 weight percent of the copper powder dry water, the copper powder accounts for 5 to 20 weight percent of the copper powder dry water, and the balance is water. The copper powder dry water is prepared by the step of mixing the hydrophobic fumed silica, copper powder and water and stirring for 30 to 120 seconds at a speed of 10,000 to 30,000 revolutions per minute. The copper powder dry water has the advantages of simple preparation technology, and capacities of being applied to the field of gas storage of the hydrate, greatly increasing air water contact area and improving the gas storage rate of the hydrate. The nano copper powder in the copper powder dry water can enhance the thermal conductivity so as to timely conduct the heat which is generated by hydration reaction and accelerate the hydration reaction.
Description
Technical field
The present invention relates to hydrate gas storage technical field, be specifically related to a kind of copper powder dry water and the method for making and application that can improve gas storage rate of hydrate.
Background technology
Gas hydrate is the non-stoichiometric cage compound that micro-molecular gas such as water and methane, ethane, carbon dioxide and hydrogen sulfide form.The hydrate crystal structure that has had been found that at present has 3 kinds on I type, II type and H type.The research of gas hydrate roughly can be divided into 3 stages: the phase I is (1810～1934 years) laboratory research, mainly is that composition and those gas that scientist studies hydrate out of curiosity can form hydrate; Second stage (1934～1993 years) mainly is thermodynamic condition and an inhibition method of confirming that hydrate generates for hydrate research Rapid development stage; The research that phase III (1993～so far) hydrate generates decomposition kinetics makes substantial progress, and hydrate begins to obtain extensive concern in the potential application of aspects such as gas storage, cold-storage, separation.
Hydrate gas storage is meant gas is got into as guest molecule in the hydrate cage modle lattice of host molecule water formation, realizes a kind of method of gas storage through the Van der Waals force effect.Hydrate gas storage has advantages such as safety, clean and effective.Under the status of criterion, the methane hydrate of 1 volume can store the methane of about 180 volumes.The shortcoming of utilizing hydrate gas storage to exist at present mainly contains: (1) gas-water contact area is little, and slow (2) the hydrate gas-storing capacity of reaction rate is low.Little for solving gas-water contact area, the problem that reaction rate is slow, researcher has also been taked enhancements, and like measures such as mechanical agitation, sprayings, these measures at present can only be applied to laboratory scope, are difficult to industrialization.
Solid carbon dioxide is that water and hydrophobicity aerosil stir a kind of free-pouring powdered substance that forms in the air high speed.2009, the Wang Wei magnitude utilized solid carbon dioxide to strengthen the generation of gas hydrate first, has significantly improved gas-water contact area, and reaction rate is significantly improved, and simultaneously gas-storing capacity is improved at short notice.Carter etc. add gelling agent and form xerogel to improve the cyclic utilization rate of solid carbon dioxide gas storage in solid carbon dioxide.Hydration reaction is a kind of exothermic reaction, and the fuel factor that above-mentioned research produces when all not considering hydrate gas storage if liberated heat can not in time be discharged, can make hydration reaction speed reduce, and influences the gas storage effect.
Summary of the invention
Gas-water contact area when one aspect of the present invention is to increase hydrate gas storage, the heat that produces when being hydration reaction is on the other hand in time discharged, and improves hydrate reaction speed, and the gas-storing capacity in the hydrate short time is improved.
The method that the present invention utilizes high-intensity stirrer to pass through high speed shear has been mixed hydrophobic nano level aerosil powder, nanoscale copper powder and water, has prepared a kind of copper powder dry water that can improve gas storage rate of hydrate.The copper powder dry water particle of preparing is solid state, and particle size is between 20～100 μ m, and hydrophobic nano level aerosil particle and copper nanoparticle are evenly distributed.
Copper powder dry water preparation technology of the present invention is simple, can be applicable to hydrate gas storage field, can significantly increase gas-water contact area, improves gas storage rate of hydrate.The existence of nanoscale copper powder can increased thermal conductivity in time conduct the heat of hydration reaction generation in the copper powder dry water, quickens hydration reaction.
The present invention realizes through following technical scheme:
A kind of copper powder dry water that improves gas storage rate of hydrate is made up of hydrophobicity aerosil, copper powder and water.
Said hydrophobicity aerosil accounts for 5%～15%wt of copper powder dry water, and copper powder accounts for 5%～20%wt, and all the other are water.The particle size of said copper powder dry water is at 20～100 μ m.
The particle diameter of said hydrophobicity aerosil is 7～40nm, and specific area is 100～300m
2/ g.
The particle diameter of said copper powder is 10～30nm.
The preparation method of described copper powder dry water may further comprise the steps;
Hydrophobicity aerosil, copper powder and water are mixed back stirring 30～120s under 10000～30000r/min make copper powder dry water.
Said hydrophobicity aerosil accounts for 5%～15%wt of copper powder dry water, and copper powder accounts for 5%～20%wt, and all the other are water.
The particle diameter of said hydrophobicity aerosil is 7～40nm, and specific area is 100～300m
2/ g.
The application of described copper powder dry water in hydrate gas storage neck, said copper powder dry water serviceability temperature is-80～30 ℃, working pressure is 0～100MPa.
Advantage and beneficial effect that the present invention has with respect to prior art.
Gas-water contact area when (1) the present invention can improve hydrate reaction greatly improves hydrate gas-storing capacity in gas storage rate of hydrate and short time.The existence of copper powder can increased thermal conductivity in time conduct the heat of hydration reaction generation, quickens hydration reaction.
(2) preparation technology of the present invention is simple, is easy to large-scale production.
The specific embodiment
Below just the present invention further illustrate, but embodiment of the present invention is not limited in this.
Embodiment 1
(1) use balance to take by weighing hydrophobicity aerosil powder that the 5g particle size range is 7～40nm, nanoscale copper powder that the 5g particle size range is 10～30nm and the deionized water under the 90g room temperature respectively.
The raw material that (2) will take by weighing is put into high-speed stirred wherein, under 10000r/min, stirs 30s and makes copper powder dry water, and making the copper powder dry water particle size range is 20～100 μ m.
Embodiment 2
(1) use balance to take by weighing hydrophobicity aerosil powder that the 10g particle size range is 7～40nm, copper powder that the 10g particle size range is 10～30nm and the deionized water under the 80g room temperature respectively.
The raw material that (2) will take by weighing is put into high-speed stirred wherein, under 20000r/min, stirs 60s and makes copper powder dry water, and making the copper powder dry water particle size range is 20～100 μ m.
Embodiment 3
(1) use balance to take by weighing hydrophobicity aerosil powder that the 15g particle size range is 7～40nm, copper powder that the 15g particle size range is 10～30nm and the deionized water under the 70g room temperature respectively.
The raw material that (2) will take by weighing is put into high-speed stirred wherein, under 25000r/min, stirs 90s and makes copper powder dry water, and making the copper powder dry water particle size range is 20～100 μ m.
Embodiment 4
(1) use balance to take by weighing hydrophobicity aerosil powder that the 15g particle size range is 7～40nm, copper powder that the 20g particle size range is 10～30nm and the deionized water under the 65g room temperature respectively.
The raw material that (2) will take by weighing is put into high-speed stirred wherein, under 30000r/min, stirs 120s and makes copper powder dry water, and making the copper powder dry water particle size range is 20～100 μ m.
Embodiment 1～4 preparation copper powder dry water instantiation is seen table 1:
Table 1
The copper powder dry water for preparing is put into water under high pressure compound agitated reactor, agitated reactor is vacuumized, feed gases methane then with vavuum pump.Set initial temperature and pressure, cooling makes it generate hydrate then, treats that temperature and pressure is stable, and reaction finishes.
The copper powder dry water gas storage performance of preparation is seen table 2:
Experimental result can be found out, is 6MPa at initial pressure, and reaction temperature is under the 273.15K condition,? The g copper powder dry water can generate hydrate with the methane fast reaction, and the gas-storing capacity of all samples can both reach 80% of maximum gas-storing capacity after reacting 1.5 hours.Wherein, the effect of sample 2 is best, reacts and can reach 90% of maximum gas-storing capacity after 1.5 hours.
Table 2
Claims (1)
1. a preparation method who improves the copper powder dry water of gas storage rate of hydrate is characterized in that, may further comprise the steps;
(1) use balance to take by weighing hydrophobicity aerosil powder that the 10g particle size range is 7～40nm, copper powder that the 10g particle size range is 10～30nm and the deionized water under the 80g room temperature respectively;
The raw material that (2) will take by weighing is put into high speed agitator, under 20000r/min, stirs 60s and makes copper powder dry water, and making the copper powder dry water particle size range is 20～100 μ m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102299787A CN101905320B (en) | 2010-07-16 | 2010-07-16 | Copper powder dry water for improving gas storage rate of hydrate and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102299787A CN101905320B (en) | 2010-07-16 | 2010-07-16 | Copper powder dry water for improving gas storage rate of hydrate and preparation method and application thereof |
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| CN101905320A CN101905320A (en) | 2010-12-08 |
| CN101905320B true CN101905320B (en) | 2012-07-18 |
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| CN109022075A (en) * | 2018-09-20 | 2018-12-18 | 王敏 | A kind of preparation method of polymolecularity gas hydrates colloidal sol additive |
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| DE1467023A1 (en) * | 1964-02-28 | 1969-01-23 | Degussa | Process for the incorporation of water in finely divided silica |
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