EP0874189A1 - Verfahren zur Benutzung von hydrat-ähnlichen Gasprodukten und Behälter dafür - Google Patents

Verfahren zur Benutzung von hydrat-ähnlichen Gasprodukten und Behälter dafür Download PDF

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Publication number
EP0874189A1
EP0874189A1 EP98107557A EP98107557A EP0874189A1 EP 0874189 A1 EP0874189 A1 EP 0874189A1 EP 98107557 A EP98107557 A EP 98107557A EP 98107557 A EP98107557 A EP 98107557A EP 0874189 A1 EP0874189 A1 EP 0874189A1
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EP
European Patent Office
Prior art keywords
gas
porous material
fuel gas
tank
city
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.)
Withdrawn
Application number
EP98107557A
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English (en)
French (fr)
Inventor
Toshiharu Okui
Yuriko Maeda
Takefumi Ishikura
Tokudai Neda
Ken-Ichi Nakamura
Yu-Ichiro Okazima
Takeshi Abe
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Tokyo Gas Co Ltd
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Tokyo Gas Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP9109884A external-priority patent/JPH10299995A/ja
Priority claimed from JP9108454A external-priority patent/JPH10299422A/ja
Priority claimed from JP12496097A external-priority patent/JP3710594B2/ja
Priority claimed from JP12495997A external-priority patent/JP3522493B2/ja
Priority claimed from JP9124961A external-priority patent/JPH10299999A/ja
Priority claimed from JP9111676A external-priority patent/JPH10299994A/ja
Application filed by Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Publication of EP0874189A1 publication Critical patent/EP0874189A1/de
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C11/00—Use of gas-solvents or gas-sorbents in vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C11/00—Use of gas-solvents or gas-sorbents in vessels
    • F17C11/007—Use of gas-solvents or gas-sorbents in vessels for hydrocarbon gases, such as methane or natural gas, propane, butane or mixtures thereof [LPG]

Definitions

  • This intention relates to a method for utilization of a material comprising a novel and useful hydrate-like matter of gases and a tank therefor.
  • the invention relates to a method for utilizing a material of the type which comprises a porous material, a host compound, such as water, and one or more guest compounds made of lower hydrocarbons so that the material contains a hydrate-like matter of the lower hydrocarbons inside the fine pores of the porous material and a tank therefor.
  • the invention relates to a method for utilization of a high-density methane hydrate formed inside the fine pores of a porous material, and to a tank therefor.
  • the invention relates various methods indicated under (1) to (7) below and tanks therefor wherein the action of forming a material comprising the hydrate-like matter of a lower hydrocarbon inside the fine pores of the porous material, and the action of separating and releasing the lower hydrocarbon from the formed material are utilized.
  • Such methods include (1) a method of compressing gas under high pressure (high pressure compression method), and (2) a method of cooling and liquefying gas as seen in the case of liquid nitrogen, liquid oxygen, or liquefied natural gas (LNG) or liquefied petroleum gas (LPG) (liquefaction-by-cooling method).
  • high pressure compression method high pressure compression method
  • LNG liquefied natural gas
  • LPG liquefied petroleum gas
  • the high pressure compression method referred to under (1) above not only requires means of compressing gas under high pressure, but also a high pressure gas cylinder as a storage container. Sufficient pressure-resistant strength is required of containers, so that the method has a drawback that the weight of a container becomes very large in comparison with the weight of gas to be stored.
  • a gas pressure exceeding 10.68 atm equivalent to 10 kg/cm 2 by gauge pressure
  • materials, facilities, pipings and the like meeting specifications specified under the regulations for the control of high pressure gas are required, causing the method to become costly as a result.
  • gas needs to be compressed, and cooled for liquefaction thereof, not only resulting in high cost, but also requiring separate and special facilities to keep the liquefied gas cooled. Furthermore, similar to the method (1) as above, this method is subject to regulatory constrains. Under the circumstances, viable application of this method is limited to high-valued gas, such as helium, or LNG or LPG in which economies of scale can be realized.
  • gas can be stored at a pressure lower than that for the above-mentioned method using a high pressure cylinder. Still, a pressure at 10.68 atm (equivalent to 10 kg/cm 2 by gauge pressure) is normally required.
  • gas to be stored is, for example, hydrogen
  • its storing material has to be, for example, palladium or its alloy.
  • a suitable storage material is limited to specific materials on the basis of nearly one-to-one relation with the gas to be stored, and further, a cost of the method becomes higher since the storage material is of a specific type and expensive.
  • meticulous care needs to be exercised in handling of the storage material because of a tendency of embrittlement thereof when used repeatedly.
  • the method referred to under (5) above has a problem that a kind of gas to be stored is limited, and a material required for storage is of a special type and expensive. Then, in the case of the method (6), it is of a gas-liquid contact type, and therefore, its effect is largely dependent on a gas-liquid contact efficiency, with the attendant problem that an amount of gas actually stored is substantially lower than an amount anticipated on a theoretical basis.
  • city gas is prepared in a city gas-making plant using LNG or the like as starting material, for example, and is supplied to individual users via gas supply pipes.
  • the amount of city gas being supplied to individual consumers varies seasonally or daily.
  • scrupulous care should be paid in order to conform the capabilities of the city gas-making plant and the supply pipes to the varying amount of the gas being supplied so that a maximum demand of city gas can be met.
  • a gas fuel such as city gas
  • city gas is normally used as fuel for normal operation of a generator in the cogeneration system.
  • the fuel is changed over to a liquid fuel such as heavy oil, kerosine or the like, thereby ensuring the operation at that time.
  • a liquid fuel not only requires a separate tank for the liquid fuel and separate facilities including a piping and a burner for exclusive use, but also results in a factor of increasing a cost. Further, the use of liquid fuel causes an operation control system and its handling to be complicated.
  • the duration time of the electric generation is usually as short as around two hours although depending on the capacity of a fuel storage tank. When the stop of city gas supply continues over a long time, the liquid fuel has to be often supplemented.
  • a gas fan-forced heater for heating a room is advantageous in that it is able to heat quickly, lightweight and portable, and is now in the mainstream of gas heating.
  • a gas fuel has to be fed to the gas fan-forced heater, a separate pipe is essential. Accordingly, such a heater cannot be used in a room which is free of any pipe or stopcock. This is true of gas heaters.
  • oil fan-forced heaters and oil heaters have a problem on the feed of oil fuel in liquid form and also on an offensive odor thereof.
  • the fuel gas is filled in a tank according to a high pressure compression method, in which it is required to pressurize the fuel gas in the tank, thus needing a high pressure container.
  • a high pressure container is mounted in automobiles, not only the pressure resistance, but also strength sufficient to withstand tossing and impact occurring during the running of an automobile is required of the container, resulting in a very great weight thereof.
  • the transport efficiency becomes poor if it is in gaseous form.
  • the gas is liquefied according to a liquefying-by-cooling method and transported in the form of LNG or LPG.
  • LNG is conveyed to an acceptance base by means of LNG ship equipped with a special construction capable of pressurization and cold storage of LNG.
  • the acceptance base is provided with a pier for LNG exclusive use which permits a giant ship to come alongside and which has shipping and discharging facilities, followed by transfer of LNG to an acceptance tank provided with an overland pressurizing and heat-insulating function where it is stored.
  • the transport of LNG from the acceptance tank to inland areas, where LNG is employed as city gas, is such that LNG is transmitted from the acceptance tank via pipelines or LNG tank lorries to LNG tanks of city gas-making plants, and supplied to individual consumers through the respective pipeline networks.
  • the LNG tank lorry used is one which is provided with a pressurizing and heat-insulating function and is exclusively used for LNG.
  • the tank lorry is charged with LNG at the acceptance base, and the LNG is transported to a satellite base along the route described in the public peace regulations.
  • the liquefaction and transport of natural gas involves an extremely large energy consumption necessary for compressing and cooling the gas for liquefaction, and needs an additional energy for transport and heat insulating during the storage, presenting the problem that the energy consumption is very great as a whole.
  • the handling and storage of liquefied gas needs facilities and apparatuses required in conformity with the security regulations, resulting in a great burden with respect to facility investment and operation costs.
  • a lower hydrocarbon e.g. methane
  • forms a clathrate compound with water that is, a methane hydrate
  • water that is, a methane hydrate
  • the methane hydrate consists of water and methane which do not react with each other under ordinary conditions, and the formation thereof requires, for example, a high pressure of not less than around 80 MPa at a temperature of 303 K.
  • the methane clathrate is a very unstable substance and has to be handled while avoiding its decomposition, thus being very troublesome.
  • a porous material, a compound serving as host, such as water, and a lower hydrocarbon are brought in contact with one another under mild conditions at or close to ordinary temperature under or close to ordinary pressure, thereby forming a hydrate-like matter composed of the porous material, the host compound, such as water, and the lower hydrocarbon.
  • a large volume of the lower hydrocarbon equivalent for example, to not less than 180 times (converted to the standard state basis) an unit volume of the porous material can be taken therein within a very short time. In this way, the formation of the material containing a hydrate-like product of the lower hydrocarbon in the fine pores of the porous material does not need any separate, special cooling device or any special pressurizing facilities.
  • known methane hydrate is a substance which is structurally very unstable, and has to be handled while avoiding its decomposition.
  • the hydrate-like matter of the lower hydrocarbon obtained in the present invention is beyond expectation. Further, it has also been unexpected at all that the hydrate-like matter of the lower hydrocarbon is formed under mild conditions at or close to ordinary temperature and under or close to ordinary pressure according to the invention on comparison with the fact that a conventional manner of forming methane hydrate needs high pressure.
  • the various problems involved in the handlings i.e. the manners of storage, transport, supply and feed control, of gases such as lower hydrocarbons including methane, ethane, ethylene, propane, butane and the like, mixtures thereof, natural gas and city gas mainly composed of methane, and petroleum gas, can be solved at a stroke by utilizing the action of forming a material containing a hydrate-like matter of a lower hydrocarbon inside the fine pores of a porous material in the presence of a host compound, the action of separating the lower hydrocarbon from the formed material, and the action of releasing the lower hydrocarbon.
  • gases such as lower hydrocarbons including methane, ethane, ethylene, propane, butane and the like, mixtures thereof, natural gas and city gas mainly composed of methane, and petroleum gas
  • a lower hydrocarbon is, for example, methane
  • a material comprising a hydrate-like matter of the lower hydrocarbon is obtained inside the fine pores of a porous material wherein the compositional ratio between methane and water in the hydrate-like matter ranges 0.5 to 1.5: 1.
  • a high-density methane hydrate having a compositional ratio between methane and water of 0.5 to 1.5:1 and formed in the fine pores of the porous material is obtained. Similar results are obtained when using lower hydrocarbons other than methane.
  • the porous materials are not critical provided that they are porous materials having fine pores and have a large specific surface area. Solid materials having microfine holes are used. Preferably, porous materials having microfine holes with a pore size of several nanometers to several tens nanometers and a specific surface area of 100 m 2 /g or above are used.
  • porous materials examples include active carbon, ceramics, activated clay, arid the like. These active carbon, ceramics, activated clay and the like are inexpensive and readily available. The invention is quite advantageous in this regard.
  • Active carbon includes ones having various characteristics and shapes.
  • Active carbon suitable for the present invention includes, aside from ordinary active carbon, active carbon fibers, porous carbon and the like.
  • porous carbon having, for example, a specific surface area of 2280 m 2 /g, a pore capacity of 1.48 ml/g, and an average pore size of 1.3 nm is commercially sold.
  • the pore size distribution and the specific surface area can be readily confirmed by measuring an amount of nitrogen adsorbed at the liquid nitrogen temperature and an adsorption isotherm.
  • the active carbon material has a very large specific surface area, a very large number of molecules can be adsorbed on the surfaces inside the fine pores.
  • the molecules of a lower hydrocarbon adsorbed on the active carbon are considered to react in a state where most of the molecules are exposed to the surface at the inside of the fine pores.
  • the active carbon may be used in powder form, granular form, and various required forms molded to an extent of not impeding the porosity.
  • Active carbon fibers are not limited to fibrous form, but may be in powder form, granular form, or various required forms molded to an extent not impeding the porosity thereof.
  • porous materials do not react with a compound serving as host or dissolved in the host compound, they can be used irrespective of the type of material, the manner of preparation and the shape.
  • the shape of the fine pores and the pore size distribution should preferably be uniform, but may be non-uniform.
  • the lower hydrocarbons used for this purpose in the invention include methane, ethane, ethylene, propane, butane and mixed gases of two or more of these gases.
  • the gas may contain a minor amount of other components.
  • Examples of the mixed gas include natural gas, city gas, petroleum gas, and the like. These gases are compounds serving as guest in the hydrate-like matter of a lower hydrocarbon or high-density methane hydrate of the invention.
  • Water which is the other constituent component of the lower hydrocarbon hydrate-like matter or high-density methane hydrate, is a compound serving as host when such lower hydrocarbon hydrate-like matter or high-density methane hydrate is formed.
  • carbon dioxide can form a hydrate-like matter inside the fine pores of the porous material.
  • Examples of a compound serving as host include, aside from water, alcohols such as methyl alcohol, ethyl alcohol and the like, organic acids such as formic acid, acetic acid and the like, quinones such as benzoquinone, hydroquinone and the like, and urea. Of these, water or alcohols are preferably used. It will be noted that hydroquinone is able to form a hydrate-like matter of a rare gas serving as guest inside the fine pores of the porous material.
  • a porous material, water, and a lower hydrocarbon are brought in contact with one another under mild conditions at or close to ordinary temperature and under or close to ordinary pressure to form a hydrate-like matter of the lower hydrocarbon inside the fine pores of the porous material.
  • the hydrate-like matter is formed in a short time, and a large amount of the lower hydrocarbon equivalent, for example, to not less than 180 times (converted to the standard state basis) an unit volume of the porous material can be taken in or occluded.
  • the temperature conditions are in the range of -40°C to 50 o C, preferably -30°C to 40 o C, more preferably 0°C to 40°C, and most preferably 3°C to 40°C.
  • the pressure conditions are preferably in the range of 0.1 atm to 35 atm including atmospheric pressure.
  • a pressure of 0.5 atm or above is preferred.
  • the upper limit of pressure is not limited, and it is preferred from the viewpoint of legal regulations and security to use around 35 atm or below.
  • the fine pores of active carbon is sufficiently small in diameter ranging from, for example, several nanometers to several tens of nanometers, and as a result, the molecules adsorbed to the surfaces of the fine pores behave as if they were under high pressure conditions. Such behavior represents a phenomenon known as a quasi-high pressure effect. Phase transition, reaction, and the like which occur normally only under high pressure can occasionally happen under moderate conditions of lower pressure and lower temperature by use of a porous material having fine pores. The formation of the hydrate-like matter of a lower hydrocarbon according to the invention is presumably attributable to such a phenomenon as described above although the cause thereof is not known in detail.
  • water is a compound which is able to take a certain structure via hydrogen bond when several molecules thereof cluster.
  • guest molecules gas molecules
  • a clathrate compound is formed, causing gas molecules to be crystallized in a very close proximity to each other and stabilized.
  • This is a phenomenon wherein the host substance coexisting with gas molecules serving as guest under certain pressure and temperature conditions forms jointly with the gas molecules, through hydrogen bond, specific cubic structures, for example, cage-like structures in which the guest molecules are surrounded by the host molecules, and such a clathrate is normally formed under conditions of low temperature and high pressure.
  • the invention enables a large amount of a lower hydrocarbon to be occluded rapidly without need of high pressure, for example, under reduced or non-pressurizing conditions, through combination of a high absorbing capacity of the porous material, the above-mentioned quasi-high pressure effect inside the fine pores, and the characteristic of the lower hydrocarbon capable of forming clathrates, thereby forming the hydrate-like matter of the lower hydrocarbon inside the fine pores of the porous material.
  • the embodiments of the method of forming a material containing a hydrate-like matter of a lower hydrocarbon inside the fine pores of a porous material according to the invention include, for example: (1) the porous material is placed in a reaction container first, and then water is fed into the container wherein it is adsorbed to the porous material, followed by further feed of a lower hydrocarbon thereinto; (2) the porous material to which water has already been adsorbed is placed in a reaction container, and then lower hydrocarbon gas is fed into the container; (3) the porous material is placed in a reaction container, into which water and lower hydrocarbon gas are introduced at the same time; and (4) the procedures mentioned above under (1) to (3) are used in combination.
  • water may be fed and adsorbed to the porous material by spraying or impregnation.
  • water may be fed in steam form.
  • steam and lower hydrocarbon gas are introduced at the same time. In this case, care should be paid in order not to cause any inconvenience such as of condensation of the vapor by controlling the flow rate or temperature of the lower hydrocarbon gas or by appropriately designing an inner diameter of a pipe thereof.
  • the hydrate-like matter may be formed under reduced pressure or normal pressure, so that any high pressure container is not necessary for use as the reaction container.
  • a high pressure container may be used.
  • the hydrate-like matter can be prepared under a pressure exceeding, for example 10.68 atm ( ⁇ 1082 kPa or 10 kg/cm 2 by gauge pressure). In the case, a high pressure container which is resistant to such a high pressure is employed.
  • heating is applied to for the desorption and release, for example, of methane, a temperature of about 60°C enables methane to be desorbed substantially completely.
  • Appropriate means such as of electric heating, heating mediums including hot water, steam, etc., may be used as heat source.
  • Heat may be applied to via known heat exchanging means such as various types of heat exchangers.
  • Hitherto known methane hydrate has a compositional ratio between methane and water of 1:5.75 (CH 4 /H 2 O ⁇ 0.174), thus water being present in major proportion.
  • the compositional ratio between methane and water in the material containing the methane hydrate-like matter inside the fine pores of the porous material, high-density methane hydrate, and high-density methane hydrate formed in the fine pores of the porous material of the invention ranges about 0.5 to 1.5:1 (CH 4 /H 2 O ⁇ 1/2 to 3/2).
  • the content of methane is very large. This is true of lower hydrocarbons other than methane, carbon dioxide, and rare gases.
  • methane hydrate is in the form of sherbet or snow, and is an unstable substance.
  • the material containing the methane hydrate-like matter in the fine pores of the porous material used in the invention keeps the shape of the porous material substantially as it is, in which methane and water are occluded, in hydrate form, inside the fine pores and the material is stable. This is true of the case using lower hydrocarbons other than methane, carbon dioxide, oxygen, nitrogen, and rare gases such as argon.
  • the material containing the lower hydrocarbon hydrate-like matter inside the fine pores of the porous material used in the invention a large volume of lower hydrocarbon gas is occluded in a small capacity of the porous material and can be released.
  • the material is compact in size and is applicable to storage, transport and supply services of a large amount of one or more lower hydrocarbons, natural gas, city gas, petroleum gas and the like, and can be widely used in various fields.
  • the invention makes use of such functions of occlusion and release.
  • the city gas tank of the invention is so arranged that a porous material is placed in a container, and city gas is caused to be adsorbed to the porous material in the presence of a compound serving as host.
  • a compound serving as host and city gas to be adsorbed at the inside of the fine pores is brought in contact with the porous material placed in the city gas tank under mild conditions of ordinary temperature and of ordinary pressure or close to these temperatures and pressures.
  • a large volume of city gas equivalent for example, to not less than 180 times (converted to the standard state basis) an unit volume of the porous material can be stored in a very short time.
  • the temperature and pressure conditions at the time of storing in the city gas tank are similar to those conditions of producing the material containing the hydrate-like matter of the lower hydrocarbon. More particularly, the temperature ranges-40°C to 50°C, preferably -30°C to 40°C. and more preferably 0°C to 40°C.
  • the pressure at the time of storage in the city gas tank is not limited to a pressure range of normal pressures to 10.68 atm (10 kg/cm 2 by gauge pressure), and city gas can be adsorbed to under a reduced pressure, for example, of 0.2 atm. Under a high pressure exceeding 10.68 atm (10 kg/cm 2 by gauge pressure), a larger amount of gas corresponding to the pressure can be stored in the tank.
  • the storage is probably possible from 0.1 atm, however, from the standpoint of pressure-reducing means and a material for reaction container, a pressure of 0.5 atm or above is preferred.
  • the upper limit of pressure is not limited, and it is preferred from the viewpoint of legal regulations and security to use a range of 35 atm or below.
  • the city gas tank for supplying city gas in the invention does not need any special cooling device, or any special pressure equipment, thus being very effective in practical applications.
  • urea or hydrogen sulfide may he used, for example, as a host compound, these generate sulfur dioxide or nitrogen oxides (NOx) when combusted as fuel. These compounds, which emit the harmful gases on combustion, should be used after solving this problem.
  • city gas is stored in the tank in the same manner as in the case of forming the material containing the hydrate-like material of a lower hydrocarbon inside the fine pores of the porous material. More particularly, (1) the porous material is placed in a tank vessel , after which a host compounds is fed and adsorbed to the porous material, followed by further introduction of city gas; (2) the porous material to which a host compound has been adsorbed beforehand is placed in the tank vessel, into which city gas is introduced; (3) the porous material is placed in the tank vessel, into which both host compound and city gas have simultaneously introduced; and (4) two or more of the embodiments referred to under (1) to (3) above are used in combination. According to these embodiments, the hydrate-like matter of city gas is formed inside the fine pores of the porous material in the tank, and thus, city gas is stored in the tank.
  • any high pressure container is not necessary.
  • a high pressure container may be used.
  • city gas can be likewise stored under a pressure exceeding, for example, 10.68 atm (10 kg/cm 2 by gauge pressure).
  • high pressure containers capable of withstanding such a high pressure are used.
  • the city gas tank of the invention may have any external forms as conventionally employed tanks for city gas or other various gases, such as a cylindrical form, round form, cubic form, rectangular form, and other appropriate forms.
  • the constituting materials of the tank container are not critical, and materials usable for hydrocarbon fuels, such as stainless steels, may be used.
  • the porous material is filled inside the tank.
  • the porous material can be filled as it is. Besides, it may be filled in an appropriate manner of forming a single layer or two or more layers.
  • the porous material is filled as layer, the material is supported with a meshwork or a perforated plate.
  • the city gas tank is provided with a feed pipe for host compound and a fed pipe for city gas.
  • the two pipes may be separately provided. Alternatively, one pipe may be used for both gases. Any of these pipes may also be used as a discharge pipe when city gas is supplied.
  • the porous material which has been once placed in the gas tank, may be repeatedly used.
  • the city gas tank of the invention may be (1) arranged at a city gas supply base (i.e. a satellite base) or on the way of a main pipe line.
  • a city gas supply base i.e. a satellite base
  • the manufacture of city gas in city gas manufacturing facilities can be flattened.
  • the amount of manufacture of city gas can be so flattened that when its demand is small, city gas is stored in the city gas tanks and is released when the demand increases without increasing the city gas-manufacturing capacity in city gas manufacturing facilities in conformity with the peak of demand.
  • the city gas tank of the invention is (2) arranged on the way of a city gas feed pipe.
  • the city gas tank is used for controlling the feed of city gas, and is employed for controlling the feed of city gas depending on seasonal variation of demand of city gas or the variation of demand such as daily variation.
  • the city gas tank of the invention is (3) arranged in a city gas feed pipe-extending laying operation region in which the tank is used for supplying city gas before completion of the operation.
  • the city gas tank of the invention is arranged such that (1) after city gas is stored in the tank, it is transported, shipped and set in position, and (2) the tank is set in position wherein city gas is stored.
  • the embodiment (2) above is preferably adopted.
  • city gas can be supplied normally and emergently to individual consumers.
  • City gas is supplied to individual consumers from a city gas main pipe via a pipe for individual consumer.
  • the pipe for the consumer is provided with a branch pipe along with the city gas tank of the invention. If the feed of city gas from the city gas main pipe is short or is stopped in emergency, city gas is released from the city gas tank and supplied to individual consumers.
  • fuel gas such as city gas, petroleum gas or the like
  • a gas turbine or gas engine for driving the generator assembled for use in a cogeneration system.
  • fuel gas is combusted, and the gas turbine or gas engine is run by the agency of the combustion gas to generate electric power with waste heat of the combustion gas being utilized as a heat source of air conditioning or hot water supply.
  • City gas is normally used as the fuel gas, and is supplied via a pipe from a city gas main pipe.
  • a branch pipe is provided to the pipe from the main pipe, and the fuel gas tank is disposed at the branch pipe.
  • the fuel gas tank is disposed at the branch pipe.
  • a fuel gas tank of the invention which is not disposed at the branch pipe, is separately provided so that fuel gas from this tank is supplied to the cogeneration system.
  • fuel gas is stored in the tank in the following manner.
  • the porous material is placed in a tank container, after which a host compound is adsorbed to the porous material, followed by introduction of fuel gas.
  • the porous material, to which a host substance has been adsorbed beforehand, is placed in a tank container, followed by introduction of a gas to be stored.
  • the porous material is placed in a tank container, followed by simultaneous introduction of a host substance and a gas to be stored.
  • the porous material is placed in a tank container, followed by introducing fuel gas first, and then a host substance.
  • Two or more of the embodiments referred to under (1) to (4) above are used in combination, and other various techniques may be used.
  • any high pressure container is not required.
  • a high pressure container may be used.
  • a pressure exceeding, for example, 10.68 atm (10 kg/cm 2 by gauge pressure) enables a gas to be likewise stored.
  • high pressure containers capable of withstanding such a high pressure should be used.
  • the portable and replaceable fuel gas tank may take external forms, such as a cylindrical form, round form, cubic form, rectangular form and other appropriate forms, like portable LPG heaters or portable oil stoves conventionally employed in street stall or for cooking in campground, or oil fan-forced heaters or fuel tanks employed in natural gas motor cars, for example.
  • the constituting materials of the tank container are not critical, and materials usable for hydrocarbon fuels, such as stainless steels, may be used.
  • the tank is filled with the porous material therein.
  • the porous material may be filled as it is. Besides, it may be filled in an appropriate manner of forming a single layer or two or more layers.
  • the tank is provided with a feed pipe of fuel gas to be stored and filled and a discharge pipe therefor. These pipes may be separately provided. Alternatively, only one pipe may be provided for both purposes. After storage and filling of the fuel gas in the tank, it is transported and shipped, followed by setting in position for use as a gas fan-forced heater, portable gas stove, or tank for gas fuel motor car, followed by connection to a fuel supply pipe via a connector.
  • the pipe of the tank should have, at the end thereof, a structure matching with the connector used.
  • the fuel gas used in the fuel gas tank for automobiles according to the invention is not limitative so far as it is made of lower hydrocarbons used as fuel gas for automobiles, and particularly includes methane or a lower hydrocarbon mainly composed of methane, natural gas, city gas, propane or a lower hydrocarbon mainly composed of propane, petroleum gas.
  • the storage of fuel gas in the fuel gas tank for automobiles can be performed in the case of the afore-stated portable and replaceable fuel gas tank.
  • the fuel gas tank may take, in its external shape, a cylindrical form, round form, cubic form, rectangular form and other appropriate forms, like the fuel tanks conventionally employed for natural gas motor cars.
  • the constituting material for the tank container is not critical, and any material used for hydrocarbon fuels, such as stainless steels, may be used.
  • the porous material is filled in the inside of the tank.
  • the fuel gas tank for automobiles may be (1) attached to the body of an automobile, and (2) arranged at a fuel gas stand for automobiles.
  • the foregoing description concerning the fuel gas tank for automobiles is applicable to both cases above.
  • a pipe from the gas storage tank is connected to a fuel feed pipe of the fuel gas tank, and the fuel gas in the gas storage tank is supplied in gaseous form.
  • a connector is used for the connection, for which any known "one-touch" connector may be used.
  • the stored fuel gas in the gas storage tank is supplied in gaseous form by application of heat thereto.
  • the porous material once charged in the tank and gas storage tank can be repeatedly used. The same applies to the other embodiments of the invention.
  • the transporting method is applied to the transport of a large amount of natural gas or petroleum gas.
  • the transport is carried out by accommodating the porous material in a tank, causing a large amount of natural gas or petroleum gas to be stored in the porous material in the presence of a host compound, and transporting the tank through automobiles, railways or ship.
  • the tank has such a shape and structure as set out before, and the manner of storage of gas to be transported and the manner of release are as described hereinbefore.
  • Fig. 1 is a schematic view showing the outline of an apparatus of forming the materials used in Examples 1 to 3.
  • reference numeral 1 indicates a high pressure cylinder for lower hydrocarbon gas
  • 4, 6, 8 and 10 are, respectively, a valve, 3 a regulator, 5 a gas pipe, and 7 a water vapor generator.
  • Reference numeral 9 indicates a pressure gauge, 11 a pressure vessel, 12 a beam balance, 13 a mechanism for detecting downward displacement of one of the beams of the beam balance 12 and correcting such downward displacement by electromagnetic force, 14 a porous material to which a lower hydrocarbon gas adsorbs to form a hydrate-like matter, 15 a reference weight (to which gas does not adsorb), and 16 a vacuum pump.
  • a predetermined water vapor atmosphere was formed by adequately reducing pressure further with the vacuum pump 16, and removing excess water adsorbed. Then, the valves 4 and 8 were closed to sufficiently decompress the inside of the gas pipe 5, and moisture inside the gas pipe 5 was completely removed. Subsequently, the lower hydrocarbon fuel gas was brought in contact with the porous material 14 prepared as above. While the lower hydrocarbon gas in the high pressure cylinder 1 was controlled by means of the regulator 3, it was fed into the system to form a gas atmosphere S with a predetermined pressure inside the pressure vessel 11.
  • Accurate measurement of amounts of the hydrate-like matter of water and the lower hydrocarbon gas that was adsorbed to the porous material 14 was made according to a method wherein an amount of water and the lower hydrocarbon gas, respectively, adsorbed to the porous material 14 was calculated from a quantity of electricity consumed to keep the beam of the beam balance 12 horizontal by the agency of electromagnetic force against a tendency of one end of the beam, on the side of the porous material 14, being displaced downward due to an increase in the weight of the water and the lower hydrocarbon gas adsorbed to the porous material 14.
  • a temperature of the atmosphere was kept constant by housing the apparatus in whole in a thermostat. In Fig. 1, the thermostat is not shown.
  • 0.0320 g (0.0461 cc) of pitch-based active carbon fibers (hereinafter referred sometimes to ACF) having a specific surface area of 1765 m 2 /g, an average pore size of 1.13 nm (nanometers), a pore capacity of 0.971 cc/g, an intrinsic specific gravity of 2.13 g/cc, and an apparent specific gravity of 0.694 g/cc were set in position of the apparatus shown in Fig. 1.
  • Table 1 shows the results of comparison of the amounts of methane adsorbed per 1 g of ACF as shown in Fig. 2.
  • an amount of methane adsorbed was only 0.18 mmols after the elapse of 0.2 hours in the case where methane was adsorbed straight to ACF, whereas it was 12.08 mmols in the case where water was adsorbed to ACF beforehand, 67 times as much as the former case.
  • an amount of methane adsorbed straight to ACF was 0.18 mmols, whereas it was 16.46 mmols in the case of water coexisting with methane, 91 times as much as the former case.
  • a volume of methane adsorbed to 1 cc in an apparent volume of ACF in the presence of water is calculated as 183 cc on the standard state basis at 0°C under 1 atm.
  • This result shows that methane was stored in a volume of exactly 183 times, on the standard state basis, as large as an unit volume of ACF under a pressure as low as only 0.2 atm. Then (after the elapse of 0.9 hours), an amount of methane adsorbed was found slightly reducing, and finally reached 11.77 mmols, at which a state of equilibrium was achieved without any change thereafter.
  • Example 3 shows the results of the measurements.
  • Fig. 3 variation in the weight of methane adsorbed when water was adsorbed to ACF beforehand is plotted with the mark " ⁇ ", whereas the variation obtained when methane gas was adsorbed straight to ACF is plotted with the mark " ⁇ ".
  • the amount of methane adsorbed gradually increases with an increase of the pressure, and is as small as only approximately 5 mmols at 2000 kPa ( ⁇ 19.7 atm).
  • the amount of methane adsorbed under a pressure as low as 101 kPa ( ⁇ 1 atm) is as much as 12 mmols per 1 g of ACF, which is not less than two times the amount of methane adsorbed under 2000 kPa ( ⁇ 19.7 atm) in case of methane adsorbed straight to ACF in the absence of water.
  • volume of methane adsorbed to 1 cc of ACF under different pressures according to Fig. 3, converted to respective volumes on the standard state basis, are equivalent to 191 cc under 71 kPa ( ⁇ 0.7 atm), 203 cc under 152 kPa ( ⁇ 1.5 atm) , 271 cc under 507 kPa ( ⁇ 5.0 atm), 290 cc under 1013 kPa ( ⁇ 10 atm), and 326 cc under 2000 kPa ( ⁇ 19.7 atm).
  • Fig. 4 shows the results of the measurements under these reduced pressures (low pressure methane adsorption isotherm). In Fig. 4, variation in the weight of methane adsorbed when water was adsorbed to ACF beforehand is plotted with the mark " ⁇ ", whereas the variation obtained when methane gas was adsorbed straight to ACF is plotted with the mark " ⁇ ".
  • Table 2 shows the results of comparison of the amounts of methane adsorbed per 1 g of ACF as shown in Fig. 4.
  • Table 2 shows the results of comparison of the amounts of methane adsorbed per 1 g of ACF as shown in Fig. 4.
  • an amount of methane adsorbed in the presence of water was 11.77 mmols as against the same of only 0.18 mmols when methane was adsorbed straight to ACF, representing a ratio of the former to the latter at 65.
  • FIG. 1 can be fundamentally used as an apparatus of forming the material of the invention.
  • Fig. 5 is a view showing an apparatus of forming the material according to another embodiment.
  • Reference numeral 17 indicates a pipe for lower hydrocarbon gas, which is connected to a gas storage tank, for example, of methane.
  • Reference numeral 18 indicates a water vapor generator, and 19 a reaction container.
  • a porous material 20 is packed in the container 19 and is held with a meshwork or perforated plate.
  • a valve 21 is closed and valves 22, 23 are opened, under which water vapor is generated from the water vapor generator 18 and fed into the container 19 via pipes 24, 25.
  • valve 21 is opened to feed the lower hydrocarbon gas into the container 19.
  • the water vapor may be fed into the container 19 via a pipe other than the pipe 25.
  • the water vapor may also be generated by application of heat as well as under reduced pressure. Both may be used in combination.
  • the lower hydrocarbon gas is rapidly adsorbed to the porous material to form a hydrate-like matter by the action of water serving as host.
  • the lower hydrocarbon gas is fed after the water vapor has been fed to the porous material beforehand, and it is a matter of fact that the lower hydrocarbon gas may be fed simultaneously with the water vapor.
  • care should be taken in order not to cause any inconvenience such as of condensation of the vapor by controlling the flow rate, temperature and the like of the lower hydrocarbon gas or by appropriately designing the inner diameter of the pipe (e.g. pipe 25 in Fig. 5).
  • Figs. 6(a), 6(b), 7( a) to 7(e), and 8 to 10 are, respectively, illustrative views showing examples concerning the feed of city gas and the control of city gas feed according to the invention.
  • Figs. 6(a) and 6(b) are, respectively, sectional views showing embodiments of' city gas feed tank and gas feed controlling city gas tank.
  • Fig. 6(a) shows the porous material filled in the tank at it is
  • Fig. 6(b) shows the porous material filled in the tank as layer.
  • Fig. 6(b) shows the case of two layers being formed, and three or more layers may be used. This can be said of the case of a multi-layer embodiment described hereinafter.
  • reference numeral 26 indicates a tank container, 27 a porous material, and 28 a charge and discharge pipe for host compound and city gas in which the opening of the pipe 28 inside the container extends to an upper space 30 of the tank container.
  • reference numeral 29 indicates a on-off valve.
  • reference numeral 31 indicates an intermediate space between upper and lower layers.
  • a member such as a perforate plate or a meshwork is arranged on the upper face of the porous material in Fig. 6(a) and on the upper and lower faces of the porous material in Fig. 6 (b). This can be said of embodiments appearing hereinafter.
  • the feed of a compound serving as host and city gas to the tank can be performed by use of an apparatus as shown in Example 4.
  • heating means In order to separate and release city gas from the thus arranged tank.
  • heating means is used, for example.
  • appropriate heating sources including electric heaters, and heat mediums such as hot water, steam and the like may be used for this purpose.
  • Heat can be applied to according to appropriate techniques including an internal heating technique where a heat source is built in the tank, an external heating technique wherein a heat source is arranged about the outer periphery of the tank, and a combination of both.
  • Figs. 7(a) to 7(e) are, respectively, sectional views showing feed controlling city gas tanks according to further embodiments of the invention.
  • Fig. (7a) shows a porous material which is arranged as a layer vertically formed with a through-hole.
  • reference numeral 32 indicates a through-hole, and 33 a lower space.
  • the through-hole 32 is established, for example, with a meshwork or a hollow cylinder having a multitude of holes made therein. Only one through-hole 32 is provided in the figure, and two or more through-holes kept apart from each other may be provided, if necessary.
  • a host compound and city gas fed from the inside opening of the pipe 28 extending to the upper space of the tank container are forced to enter not only from the upper and lower surfaces of the porous material layer, but also from the walls of the through-hole 32, and are more uniformly adsorbed to and stored in the porous material.
  • Fig. 7(b) shows a modification of Fig. 7(a), in which the opening of the pipe 28 inside the container is arranged to extend to a lower space of the vessel.
  • the compound serving as host and city gas fed from the inside opening of the pipe 28 inside the container enter from the walls of the through-hole 32 as well as from the upper and lower surfaces of the porous material layer, and are more uniformly adsorbed to and stored in the porous material.
  • FIG. 7(c) two porous material layers are formed with a through-hole being made in vertical directions.
  • reference numeral 34 indicates a through-hole, and 35 an intermediate space between the layers.
  • the two layers are formed, and three or more layers may be formed.
  • the through-hole 34 may be constituted, for example, of a meshwork of a cylindrical form or a hollow cylinder having a multitude of pores.
  • one through-hole 34 is formed in each of the upper and lower layers. If necessary two or more through-holes may be formed as being kept apart from each other. In the case, the numbers of through-holes, which are made in the upper and lower layers, may be changed from each other.
  • the compound serving as host and city gas which are fed from the opening of the pipe 28 in the upper space of the tank container, enter from the walls of the through-holes 34 as well as from the upper and lower surfaces of the respective porous material layers, and are more uniformly adsorbed to and stored in the porous material.
  • Fig. 7(d) shows a modification of Fig 7(c) wherein the inside opening of the pipe 28 extends up to the lower space of the tank container.
  • the compound serving as host and city gas which are fed from the inside opening of the pipe 28, enter from the walls of the through-holes 34 as well as from the upper and lower surfaces of the respective porous material layers, and are more uniformly adsorbed to and stored in the porous material.
  • the pipe 28 in the container may have a branch pipe with its opening extending to the upper space 30 and/or the intermediate space 35 in addition to the inside opening of the pipe 28 extending to the lower space.
  • Fig. 7(e) is a sectional view showing a further embodiment, in which a through-hole 36 is made vertically in the packing layer of the porous material.
  • a plurality of branch pipes 37 are provided radially from the through-hole 36.
  • the compound serving as host and fuel gas fed from the inside opening of the pipe 28 in the container enter not only from the upper surface of the porous material layer, but also from the walls of the through-holes 36 and the radial branch pipes 37, and are more uniformly adsorbed to and stored in the porous material.
  • Figs. 8 and 9 are, respectively, a modification of Fig. 7(e).
  • Fig. 8 shows an embodiment wherein the pipe 28 is extended from the through-hole 36 toward a plurality of branch pipes 37 provided radially, with its ends being opened at the branch pipes 37.
  • the compound serving as host and city gas fed from the openings of the pipe 28 in the container enter not only from the upper and lower surfaces of the porous material layer, but also from the walls of individual branch pipes, and are more uniformly adsorbed to and stored in the porous material.
  • Fig. 9 refers to an embodiment wherein a space 33 is formed at the lower portion of the packed layer. Like the case of Fig.
  • the pipe 28 may be provided with branch pipes corresponding to the radial branch pipes 37, with an opening thereof being made at the end of each radially branched pipe 37.
  • the radially branched pipes 37 may have such a structure as of the lung of man passed through bronchial tubes.
  • Fig. 10 is a schematic view showing an embodiment of such an arrangement as mentioned above.
  • reference numeral 38 indicates a city gas manufacturing plant or supply base using LNG or the like as starting material, and city gas is supplied via main feed pipes 39 and branch pipes 40 to various mills, facilities and homes.
  • Numeral 41 indicates a city gas tank provided at the plant or base, and 42 a city gas tank arranged at the branch pipe.
  • Fig. 11 shows an example of a city gas tank being provided or disposed at a city gas supply main line or branch pipe.
  • Fig. 12 is an illustrative view shoving an embodiment of normally or emergently supplying city gas to individual consumers according to the invention.
  • numeral 45 indicates a city gas main pipe in section, and 46 a city gas pipe for individual consumer.
  • the pipe 46 is provided with an intake check valve 47 for individual consumer and a weighing and emergency shutdown valve 48.
  • Branch pipes 49,50 are provided between the check valve 47 and the weighing and emergency shutdown valve 48, and a container 53 of filling a porous material capable of storing and releasing a large amount of city gas, for example, under an ordinary pressure to a pressure not exceeding 10 ka/cm 2 G is connected to the branch pipe 49, 50 via pressure control valves, respectively.
  • higher pressure may be used.
  • the container 53 has a porous material in which city gas is stored in the presence of a host compound such as water.
  • Reference numeral 54 indicates a device of supplementing a host compound such as water.
  • the container 53 may be of the replaceable type or of the regular locating type. In the latter type, the container 53 is normally set in position and wherein when city gas is released and consumed, a host compound such as water is supplemented, if necessary, and city gas is again adsorbed.
  • city gas is passed from the gas main pipe 45 via the intake pipe 46 for consumer, the intake check valve 47 for individual consumer and the weighing and emergency shutdown valve 48 for individual consumer to various gas appliances of consumer such as a boiler, a gas hot water supplier, gas burners and the like.
  • Reference numeral 55 indicates branch pipes for such gas appliances.
  • PIC is a control device connected with these detection units and the control units, and any known one may be used.
  • Fig. 13 is a view showing an example wherein fuel gas, such as city gas, is supplied, normally or emergently, to a gas turbine or gas engine of driving a generator assembled in a cogeneration system of production mills, office buildings, hospitals and the like.
  • fuel gas such as city gas
  • City gas is used for illustration, which can be said of other fuel gases.
  • Air is fed from an air pipe 56 via an air compressor 57 to a burner 58, in which city gas is combusted to generate a combustion gas.
  • a gas turbine 59 is driven by means of the combustion gas with a generator 62 being driven along with the air compressor 57 by the agency of the revolving force of the gas turbine.
  • the electric power obtained from the generator 62 is utilized as a power source of a cogeneration system.
  • the combustion gas is further introduced into a waste heat utilizing boiler 60, in which water is heated to provide hot water or steam and exhausted from a chimney 61.
  • the hot water or steam obtained in the boiler 60 is used for hot water supply or heating in the cogeneration system.
  • T indicates a switch-over valve.
  • Reference numeral 63 indicates a city gas-stored container (tank) according to the invention.
  • the container 63 is connected with pipes 64, 65 for city gas, between which a bypass pipe 66 is provided. Normally, city gas is supplied trough the bypass pipe 66 to the burner 58. In earthquake or other emergencies, city gas is fed from the stored container 63 to the burner 58. It is necessary to preliminarily store city gas in the container 63.
  • the manner of the storage is similar to the cases of the foregoing examples.
  • a feeder for a host compound such as water is not shown.
  • the gas tank of this example may also be used for normally supplying fuel gas to gas turbines or gas engines in cogeneration systems.
  • Fig. 14 is a view showing a gas fan-forced heater using the Bunsen burner for city gas.
  • Fig. 15 is a view showing an example of connecting a portable and replaceable fuel gas tank to a fuel gas feed pipe of the gas fan-forced heater as shown in Fig. 14.
  • reference numeral 70 indicates a filter, 71 fan, 72 a combustion chamber, and 73 a burner.
  • the burner 73 is provided with a fuel gas feed pipe 74, which is connected to a stopcock such as for city gas.
  • the arrow ( ⁇ ) indicates the flowing directions of air and fuel gas.
  • the portable and replaceable fuel gas tank of the invention is used by detachable connection, for example, to the fuel gas feed pipe 74 of the gas fan-forced heater.
  • Fig. 15 shows the example of the connection.
  • reference numeral 75 indicates a portable and replaceable fuel gas tank, and 76 a connector.
  • the connector 76 is preferably a "one-touch" connector.
  • the portable and replaceable fuel gas tank 75 is connected to the gas fuel feed pipe 74 via the connector 76.
  • the portable and replaceable fuel gas tank of the invention has a large amount of fuel gas filled therein, and can be used over a long time. At the time when the fuel gas is completely consumed or immediately before the complete consumption, the tank can be readily replaced at the connector 76.
  • Fuel gas can be filled and stored in these portable and replaceable fuel gas tanks in a manner as shown, for example, in Fig. 5.
  • the portable and replaceable fuel gas tank can be designed to have such structures as shown, for example, in Figs. 5, 6(a), 6(b), 7(a) to 7(e), 8 and 9.
  • the fuel gas tank for automobiles of the invention can also be designed to have such structures as shown, for example, in Figs. 5, 6(a), 6(b), 7(a) to 7(e), 8 and 9.
  • the manner of adsorption and storage of fuel gas in the tank is similar to the cases in the foregoing examples.
  • FIG. 5 The charge of fuel gas for automobiles in the tank is made in a manner as shown, for example, in Fig. 5.
  • FIG. 5 the manner of the storage is illustrated according to Fig. 5.
  • Reference numeral 17 indicates a fuel gas pipe, which is connected, at one end thereof, to a fuel gas storage tank (not shown) installed at a fuel gas stand.
  • Reference numeral 18 is a steam generator, 19 a fuel gas tank, in which active carbon is filled.
  • a valve 21 is closed, and valves 22, 23 are, respectively, opened, under which steam is generated from the steam generator 18 and is fed to the tank 19 via pipes 24, 25.
  • the valve 21 is opened, and fuel gas is fed to the tank 19.
  • the fuel gas is rapidly adsorbed and stored inside the fine pores of the active carbon by the host action of water adsorbed inside the fine pores of the active carbon.
  • the fuel gas is fed after steam is generated and fed to active carbon beforehand, fuel gas may be fed simultaneously with steam. In this case, care should be paid in order not to cause any inconvenience such as of condensation or solidification of steam by controlling the flow rate or temperature of the fuel gas or by appropriately designing an inner diameter of the pipe 25.
  • the pipe 25 shown in Fig. 5 serves both as steam pipe and fuel gas pipe, and these pipes may be separately provided. In the latter case, both pipes are connected to the tank 19.
  • the fuel gas tank filled with fuel gas may be mounted in automobiles, or may be replaced with a tank which has been mounted beforehand and whose fuel gas is fully discharged (although the fuel gas in the tank to be replaced is not necessarily discharged to an full extent).
  • the fuel gas is released and gasified from a freshly mounted fuel gas tank by application of heat or the like, and supplied to an engine of an automobile.
  • the tank of the replaceable type has been described above. It is possible to mount a fuel gas tank by fixedly setting in position of an automobile and charge fuel gas at a fuel gas stand for automobiles.
  • a device of charging fuel gas is furnished at the fuel gas stand. More particularly, this device is one which is, for example, shown in Fig. 5 and covers from the fuel gas pipe 17 to the valve 23, including the steam generator 18.
  • the pipe 17 is connected to a conventional or ordinary type of fuel gas storage tank (not shown), which is installed at the fuel gas stand.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP98107557A 1997-04-25 1998-04-24 Verfahren zur Benutzung von hydrat-ähnlichen Gasprodukten und Behälter dafür Withdrawn EP0874189A1 (de)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP108454/97 1997-04-25
JP9109884A JPH10299995A (ja) 1997-04-25 1997-04-25 常時補給型ガス供給システム
JP9108454A JPH10299422A (ja) 1997-04-25 1997-04-25 コジェネレーション発電機への非常時における燃料ガス供給方法
JP109884/97 1997-04-25
JP12496097A JP3710594B2 (ja) 1997-04-28 1997-04-28 自動車用燃料ガスタンク及び自動車用燃料ガススタンド
JP12495997A JP3522493B2 (ja) 1997-04-28 1997-04-28 可搬式兼取替式燃料ガスタンク
JP124959/97 1997-04-28
JP124961/97 1997-04-28
JP124960/97 1997-04-28
JP9124961A JPH10299999A (ja) 1997-04-28 1997-04-28 都市ガス供給量の調整方法及びそのための都市ガスタンク
JP111676/97 1997-04-30
JP9111676A JPH10299994A (ja) 1997-04-30 1997-04-30 ガスの大量輸送方法

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WO2000001980A2 (en) * 1998-07-03 2000-01-13 Toyota Jidosha Kabushiki Kaisha Gas storage method and system, and gas occluding material
WO2000036335A1 (fr) * 1998-12-15 2000-06-22 Toyota Jidosha Kabushiki Kaisha Systeme pour stocker du gaz dissous a base de methane
EP1167861A1 (de) * 1999-03-05 2002-01-02 Toyota Jidosha Kabushiki Kaisha Verfahren zur lagerung von erdgas durch adsorption und dafür zu verwendendes adsorptionsmittel
CN103420368A (zh) * 2013-07-20 2013-12-04 大连理工大学 一种连续式制备活性炭的一体化装置及方法

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000001980A2 (en) * 1998-07-03 2000-01-13 Toyota Jidosha Kabushiki Kaisha Gas storage method and system, and gas occluding material
WO2000001980A3 (en) * 1998-07-03 2000-11-09 Toyota Motor Co Ltd Gas storage method and system, and gas occluding material
US6481217B1 (en) 1998-07-03 2002-11-19 Toyota Jidosha Kabushiki Kaisha Gas storage method and system, and gas occluding material
US7060653B2 (en) 1998-07-03 2006-06-13 Toyota Jidosha Kabushiki Kaisha Method of producing gas occluding material
WO2000036335A1 (fr) * 1998-12-15 2000-06-22 Toyota Jidosha Kabushiki Kaisha Systeme pour stocker du gaz dissous a base de methane
US6584780B2 (en) 1998-12-15 2003-07-01 Toyota Jidosha Kabushiki Kaisha System for storing dissolved methane-base gas
EP1167861A1 (de) * 1999-03-05 2002-01-02 Toyota Jidosha Kabushiki Kaisha Verfahren zur lagerung von erdgas durch adsorption und dafür zu verwendendes adsorptionsmittel
EP1167861A4 (de) * 1999-03-05 2005-12-28 Toyota Motor Co Ltd Verfahren zur lagerung von erdgas durch adsorption und dafür zu verwendendes adsorptionsmittel
CN103420368A (zh) * 2013-07-20 2013-12-04 大连理工大学 一种连续式制备活性炭的一体化装置及方法
CN103420368B (zh) * 2013-07-20 2015-04-29 大连理工大学 一种连续式制备活性炭的一体化装置及方法

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