EP2327921B1 - Procédé de chargement de CO2 sur du charbon actif dans un distributeur de fluide - Google Patents

Procédé de chargement de CO2 sur du charbon actif dans un distributeur de fluide Download PDF

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Publication number
EP2327921B1
EP2327921B1 EP10192296.1A EP10192296A EP2327921B1 EP 2327921 B1 EP2327921 B1 EP 2327921B1 EP 10192296 A EP10192296 A EP 10192296A EP 2327921 B1 EP2327921 B1 EP 2327921B1
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EP
European Patent Office
Prior art keywords
gas
container
activated carbon
carbon dioxide
carbon
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.)
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Application number
EP10192296.1A
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German (de)
English (en)
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EP2327921A1 (fr
Inventor
Thomas Anthony Ryan
Harry Sharrock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chemviron Carbon Ltd
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Chemviron Carbon Ltd
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Filing date
Publication date
Priority claimed from GBGB0327983.3A external-priority patent/GB0327983D0/en
Priority claimed from GB0417550A external-priority patent/GB0417550D0/en
Application filed by Chemviron Carbon Ltd filed Critical Chemviron Carbon Ltd
Publication of EP2327921A1 publication Critical patent/EP2327921A1/fr
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Publication of EP2327921B1 publication Critical patent/EP2327921B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/60—Contents and propellant separated
    • B65D83/62—Contents and propellant separated by membrane, bag, or the like
    • 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

Definitions

  • the present invention relates to a method of filling a container for the storage and dispensation of a fluid.
  • gases may include permanent gases of singular composition, such as oxygen, nitrogen, argon, carbon dioxide, methane and propane, or mixtures of gases of either synthetic or of natural origin (for example, air or natural gas).
  • Containers of gas are required for a large number of different applications, ranging from the need to store particular gases for identification and calibration purposes to paramedical uses.
  • Gas containment may be needed for simple propellancy or pressure regulation requirements or to impart the unique property of the stored gas.
  • a container of compressed air may be used for dust removal from a computer keyboard or camera lens or it can be used as an emergency device to enable one to escape from a smoke-filled room, carriage or cabin.
  • a container of compressed oxygen may be used so that the gas can be inhaled for therapeutic or other purposes.
  • the application of oxygen is known to speed recovery following dental treatment.
  • Other applications for containers of gas can be envisaged, such as flammable gases for welding, brazing or soldering in DIY or extinguishant gases, for example carbon dioxide, for extinguishing small fires.
  • a major drawback associated with the production of containers of gases is that, unless the gas can be easily liquefied, only a small quantity of gas can be stored within the container without the need to provide reinforced containment to withstand high pressures. Furthermore, the pressure in a container holding a compressed gas drops rapidly as the contents are depleted which hinders the delivery of the gas from the container. Additional drawbacks associated with storage of compressed gases are that generally the full container remains extremely light in weight. This results in the consumer purchasing what feels like an empty can and furthermore, the container is physically unstable due to the minimal weight of the contents of the container.
  • Further container-dispenser devices use compressed gases, such as hydrocarbons, that are charged to a can containing a bag of a fluid active ingredient whereby actuation of a valve provided in the can causes the gas to press on the bag and force the ingredient out from the can.
  • compressed gases such as hydrocarbons
  • discharge of the active ingredient tends to tail off as the pressure in the can falls resulting in nonuniform and inefficient dispensation of the ingredient.
  • hydrocarbons that are volatile organic compounds is environmentally unfriendly.
  • the present invention provides a method of filling a container for the storage and dispensation of a fluid as defined in claim 1.
  • a storage container for a gas comprising a sealed vessel containing an amount of activated carbon having the stored gas adsorbed thereon.
  • the carbon dioxide is stored in the container at a pressure less than or equal to 2000000 Pascal (20 atmospheres or bars). More preferably, the pressure is 400000 - 1600000 Pascal (4-16 bar).
  • the container should be provided with a significant amount of activated carbon to increase the amount of gas that may be stored in the container and to increase the weight of the container.
  • the activated carbon fills at least 40% of the internal volume of the vessel, more preferably at least 50%, especially at least 75%.
  • the container should be provided with a valve assembly to allow gas to be inserted into and dispensed from the container.
  • a filter is provided between the activated carbon in the container and the valve, such as a high efficiency particulate air filter.
  • the container may be adapted to receive a mask, mouthpiece and/or nose piece whereby the gas contained in the can may be breathed in through the mouth and/or nose.
  • the mask, mouth or nose piece may be provided with a series of holes.
  • a lower activity carbon is used, i.e. having less than 100% CTC, more preferably less than 60%, especially less than 50%.
  • solid carbon dioxide is provided for adsorption on to the activated carbon. It has been found that this neutralizes any heat effect.
  • a fluid container-dispenser device comprising an outer relatively rigid container, an inner relatively malleable enclosure containing a fluid, a gas adsorbed on activated carbon occupying a space between the container and the enclosure and a valve assembly.
  • the malleable enclosure is plastically open to the forces of the gas released from the activated carbon whereas the outer container is rigid with respect to these forces.
  • the gas is carbon dioxide adsorbed on activated carbon. Solid carbon dioxide or dry ice is preferably used to provide the adsorbed gas.
  • a grommet may be provided in the base of the container and the valve assembly may include a dip leg that extends into the enclosure.
  • the above aspects are particularly suitable for storing and dispensing carbonated beverages.
  • Example 1 (not in accordance with the invention) investigates the adsorption of oxygen by activated carbon
  • Example 2 (not in accordance with the invention) investigates the adsorption of carbon dioxide by activated carbon
  • Example 3 illustrates the use of carbon dioxide adsorbed on activated carbon for dispensing fluids from a container
  • Example 4 (not in accordance with the invention) investigates the adsorption of nitrogen by activated carbon
  • a method and container for the enhanced storage of a gas such as oxygen.
  • a gas such as oxygen.
  • the activated carbon can advantageously adsorb gases of various types to increase the storage and working capacity of the gas within a given volume. Hence, at lower system pressures, adsorbed gas volumes are possible which are far greater than would be achieved by equivalent pressure compressed gas only.
  • FIG. 1 of the accompanying drawings illustrates the components of the container according to one embodiment.
  • a cylindrical container 2 is part-filled (generally being at least 50% full) with activated carbon.
  • a valve assembly 4 is then crimped to the top of the container and the gas to be stored therein is charged to the container.
  • the valve is also provided with a filter 6 to prevent any dust from the carbon from exiting the container upon dispensing the gas.
  • Activated carbons consist of a range of carbonaceous materials that have been specifically treated to develop an extensive capacity for the adsorption of a wide variety of gases and liquids. Such carbons may be derived from a host of sources and any type of activated carbon may be utilised in the present invention. However, for practical and commercial reasons the raw materials tend to be confined to, for example, peat, wood, coal, nutshell (such as coconut), petroleum coke and bone. Synthetic sources, such as poly(acrylonitrile) or phenol-formaldehyde, are also used for the production of activated carbon. Other sources include bamboo shoot, drupe stones and seeds.
  • Numerous methods for activation of carbon exist in the art and may be used for providing activated carbon for the present invention.
  • gaseous activation using steam, carbon dioxide or other gases at elevated temperatures is used, or chemical activation using, for example, zinc chloride or phosphoric acid.
  • the activation process is used to develop an intricate network of pores of various sizes ranging from macroporous (>50 nm) to sub-microporous dimensions of molecularsized entities.
  • the larger pores are known as transport pores and these serve to provide access to the smaller pores in which most of the adsorption of gaseous species takes place.
  • This unique pore structure, and the large surface area developed as a result provides the extensive physical adsorption property and the highest volume of adsorbing porosity of any substance know.
  • the activated product can be supplied in a variety of forms, most commonly as powdered, granular or pelleted products. Any of these forms may be used in the present invention. In addition, these forms come in a variety of sizes, which can affect the adsorption kinetic of the activated carbon. The type of base, the activation process and the activated carbon's final form and size can all influence the material's adsorption performance.
  • Activated carbons have an enormous range of commercial applications. They have been used, amongst others, for odour control, VOC abatement, propellants, flue gas treatment, protection of nuclear installations, gold recovery, solvent recovery, decolourisation, catalysis, water treatment and as the adsorbent for respirators used in civil and military filters for the removal of noxious gases. However, activated carbons have not previously been used in relation to the production of gas storage containers as described herein.
  • the concept according to the present invention is suitable for the storage of any gas that may be adsorbed on to activated carbon.
  • Table 1 illustrates the total volume of gas stored by a 1 litre container filled with activated carbon of high volumetric capacity at room temperature for seven different gases over various pressures. The corresponding volume contained by the compressed gas, in the absence of the activated carbon, is provided for comparison.
  • Example 1 Storage of Oxygen (not in accordance with the invention)
  • Activated carbons of various types, origins, densities, activities and mesh sizes were used for the study.
  • an empty aerosol-type can 400 cm 3
  • a valve was crimped to the can and oxygen, at a pre-set pressure (12 bar, 1200000 Pascal), was charged to the can via the valve to constant weight.
  • the uptake of oxygen was typically more than double the quantity that would have occupied the same can at that pressure.
  • the ratio of the weight of oxygen contained in the carbon-filled can to the weight of oxygen in the same volume of can, without any added activated carbon, is given as the Benefit Factor in Table 2 below. Table 2 Sample No.
  • HEPA filter high efficiency particulate air-filter
  • the can may be provided with an adapter piece, for example in the form of a mask or mouth and/or nose piece for fitting over the mouth and/or nose of the user.
  • an adapter piece for example in the form of a mask or mouth and/or nose piece for fitting over the mouth and/or nose of the user.
  • the adapter may be provided with a series of holes to enable the piece to be flushed with the stored gas prior to the user then breathing in the gas.
  • This type of face or nose mask is preferable to prior art gas masks which only filter out particular chemicals. In contrast, this allows the user to breathe in pure oxygen or air from the can thereby removing the need to breathe in air from the atmosphere which may not have the harmful chemical filtered out sufficiently to render the air safe.
  • Carbon dioxide is another example of a gas whose storage in a container may be enhanced by the presence of activated carbon. Carbon dioxide can have an extraordinarily high uptake on activated carbon. Values as high as about 250 g litre -1 of carbon have been recorded at 16 bar gauge pressure (1600000 Pascal) where the corresponding compressed gas weight would be only 29 g in a 1 litre volume.
  • Such high-density gas storage may be employed for all manner of applications, particularly for an innocuous, non-flammable, low toxicity and environmentally neutral material. Examples of such applications include aerosol propellants, working fluids and pressure regulating devices.
  • the degree of CO 2 uptake on activated carbon is normally regarded as a function of the level of activity to which the carbon has been subjected; the more highly activated carbons showing an increased propensity to adsorb more carbon dioxide as the microporosity and surface area increases.
  • the percentage activity of the activated carbon is measured in terms of its ability to adsorb carbon tetrachloride (% w/w) by saturating the carbon's pores with CTC.
  • Figure 4 is a generalisation of the above finding and illustrates that CO 2 adsorption increases approximately linearly with increase in the carbon's bulk density in the range of interest for carbons of the same generic type.
  • the present invention enables a sufficient amount of carbon dioxide to be stored in a suitable container to take advantage of the properties of the carbon dioxide other than its propellant properties, such as its ability to carbonate beverages or to conveniently extinguish small fires.
  • low activity carbons should be used for adsorption of the carbon dioxide for storage of gas in these lower pressure containers, rather than high activity carbon that would normally be considered to provide maximum adsorption of the gas.
  • Example 3 Use of Carbon Dioxide adsorbed on Activated Carbon in Dispensing fluid from a container.
  • a pressure regulating device for dispensing a variety of active ingredients (such as shaving gel and hair treatment products) from a container uses a so-called “bag-in-can” or “bag-on-valve” system wherein a pressurized gas surrounds the bag containing the active ingredient to force the ingredient from the bag upon actuation of a valve.
  • a pressurized gas surrounds the bag containing the active ingredient to force the ingredient from the bag upon actuation of a valve.
  • chlorofluorocarbons CFCs
  • products are generally dispensed by a mixture of hydrocarbons, for example, isopentane, isobutane and propane mixtures.
  • Such mixtures in certain proportions, provide a convenient pressure regulating fluid with a room temperature vapour pressure that is suitable for the steady and complete discharge of the active ingredient.
  • hydrocarbons do have a number of drawbacks, such as being toxic, highly flammable, greenhouse gases, volatile organic compounds and geopolitically sensitive. Additionally, cans containing these hydrocarbons are difficult to recycle owing to the flammable residues.
  • the present invention employs carbon dioxide adsorbed on activated carbon as the pressurized gas.
  • Carbon dioxide is non-toxic, non-flammable and does not fall within the definition of a volatile organic compound.
  • Carbon dioxide is derived from natural sources or as a by-product of a large combustion plant. Thus, at worst it has minimal contribution to global warming and may actually sequestrate carbon dioxide from the environment. It is ubiquitously available and is not politically or territorially sensitive.
  • the conventional hydrocarbon fluid contained in a standard bag-in-can system was removed by disengaging the grommet located at the base of the can and allowing the vapour to escape to atmosphere.
  • the can was then charged with activated carbon which had previously been saturated with carbon dioxide gas.
  • An additional amount of carbon dioxide gas was then charged to the can such as to give a total pressure of 5 bar gauge after equilibrium between the adsorbed and gaseous phases.
  • the grommet was replaced immediately after charging the carbon dioxide.
  • Solid carbon dioxide or dry ice was used to provide the adsorbed carbon dioxide since this has been found to counteract any exothermic reaction. This is particularly important if large quantities of cans are being filled as otherwise repeated cooling and charging of the can would be required.
  • valve of the can was then actuated and the dispensing characteristics of this device containing carbon dioxide was compared with an originally manufactured device containing the traditional hydrocarbon mix.
  • the mode and rate of dispensation of the active ingredient from the modified device was noted to be indistinguishable from that of an original can. Discharging of the active ingredient was continued until cessation. On subsequent examination of the device, it was confirmed that the gas still contained excess gas pressure and that the inner bag had been completely emptied.
  • adsorbed carbon dioxide gas in this manner instead of compressed gas has a number of benefits.
  • Compressed gases require excessive pressures to be used to accommodate the volume of gas required to discharge the contents of the bag. Additionally, there is a rapid and unsatisfactory fall in pressure when compressed gas is employed. This means that too much of the active ingredient is ejaculated at initial actuation and too little discharged towards the end.
  • adsorbed carbon dioxide gives only a small, almost indiscernible, pressure decrease at the end of the discharge resulting in a steadier flow of product.
  • the delivery profile is very different. The important parameter is the volume of gas delivered per unit of pressure drop.
  • the principle described in the example above could be employed from the dispensing of carbonated beverages from a bag-in-can system, as illustrated in Figure 5 of the accompanying drawings.
  • the system would employ a large volume of can, for example, 5 litres, for home consumption.
  • the device would comprise a 5 litre can 10 within which is a plastic enclosure 12 containing beer or other carbonated beverage 14, the device having a grommet 16 at the base thereof.
  • a dip-leg 18 attached to an actuating valve 20 serves to ensure that only beverage is dispensed from the device via a dispensing tube 22.
  • a space 24 surrounding the plastic enclosure is filled with carbon dioxide adsorbed on activated carbon.
  • the activated carbon optionally pre-saturated with carbon dioxide, and additional carbon dioxide, is charged to the vessel in a manner hereinbefore described.
  • This device ensures a smooth flow of beverage is dispensed until its discharge is complete.
  • the beverage also remains in a fresh and carbonated condition because the volume of the bag enclosure tracks the volume of the remaining liquid and no gas headspace can be effectively generated.
  • any gas that can be adsorbed by activated carbon may be stored in a low pressure container according to the presentconcept.
  • Adsorbed nitrogen has similar advantages to carbon dioxide for use as an aerosol propellant or pressure regulating device but, more activated carbon is required to adsorb a similar quantity of nitrogen relative to carbon dioxide at a given pressure.
  • a typical comparison, using carbon of a moderately high activity, is illustrated in Figure 6 of the accompanying drawings.
  • it may be preferable to use nitrogen for example it may be seen to be more environmentally friendly or it may be less permeable to the plastic enclosure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (2)

  1. Procédé de remplissage d'un conteneur (10) pour le stockage et la distribution d'un fluide, le procédé comprenant les étapes de :
    le remplissage partiel d'un conteneur (10) avec du charbon actif,
    l'introduction d'un fluide (14) dans une enceinte déformable (12) ;
    l'insertion de l'enceinte (12) dans le conteneur (10) ;
    le scellement du conteneur avec un assemblage de soupape (4) ; et
    le chargement d'un gaz dans le conteneur pour l'adsorption sur le charbon actif, dans lequel le gaz est du dioxyde de carbone et du dioxyde de carbone solide est utilisé pour charger le gaz dans le conteneur pour l'adsorption sur le charbon actif.
  2. Procédé selon la revendication 1, dans lequel le fluide est une boisson gazeuse.
EP10192296.1A 2003-12-03 2004-12-02 Procédé de chargement de CO2 sur du charbon actif dans un distributeur de fluide Active EP2327921B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB0327983.3A GB0327983D0 (en) 2003-12-03 2003-12-03 Storage of gases
GB0417550A GB0417550D0 (en) 2004-08-06 2004-08-06 Storage of gases and their use in dispensing fluids
PCT/GB2004/005045 WO2005054742A1 (fr) 2003-12-03 2004-12-02 Stockage de gaz et leur utilisation pour distribuer des liquides
EP04801251.2A EP1714072B1 (fr) 2003-12-03 2004-12-02 Stockage de dioxyde de carbone sur adsorbent

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP04801251.2 Division 2004-12-02
EP04801251.2A Division EP1714072B1 (fr) 2003-12-03 2004-12-02 Stockage de dioxyde de carbone sur adsorbent
EP04801251.2A Division-Into EP1714072B1 (fr) 2003-12-03 2004-12-02 Stockage de dioxyde de carbone sur adsorbent

Publications (2)

Publication Number Publication Date
EP2327921A1 EP2327921A1 (fr) 2011-06-01
EP2327921B1 true EP2327921B1 (fr) 2021-06-09

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EP10192296.1A Active EP2327921B1 (fr) 2003-12-03 2004-12-02 Procédé de chargement de CO2 sur du charbon actif dans un distributeur de fluide

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EP (1) EP2327921B1 (fr)
WO (1) WO2005054742A1 (fr)

Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
EP2431100B1 (fr) * 2006-11-22 2014-01-22 Calgon Carbon Corporation Procédé de fabrication pour un contenant sous pression rempli de carbone
US20130330257A1 (en) 2012-06-11 2013-12-12 Calgon Carbon Corporation Sorbents for removal of mercury
US20140117054A1 (en) * 2012-11-01 2014-05-01 Calgon Carbon Corporation Carbon blends for enhanced gas storage
EP2759733B1 (fr) 2013-01-29 2018-05-09 Vibracoustic GmbH Suspension pneumatique avec matériau adsorbant
GB201408399D0 (en) 2014-05-12 2014-06-25 Carbon Air Ltd Pressurised gas storage apparatus and method
CA2995357C (fr) 2015-08-11 2023-12-19 Calgon Carbon Corporation Formulation de sorbant amelioree pour eliminer le mercure present dans les gaz de combustion
GB2561148B (en) * 2017-03-01 2019-10-23 Simply Breathe Ltd Oxygen dispenser with activated carbon and carbon monoxide preventing catalyst
USD912239S1 (en) 2018-04-16 2021-03-02 Aeronics, Inc. Mask
EP4233947A3 (fr) 2018-04-16 2023-11-01 Aeronics, Inc. Système portable de distribution de gaz
US10597206B2 (en) 2018-06-15 2020-03-24 Kenneth Corey Medicine container cover
GB2580010B (en) 2018-07-27 2021-12-29 Simply Breathe Ltd Bag on valve technology

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US4049158A (en) 1975-11-13 1977-09-20 S. C. Johnson & Son, Inc. Pressurized container-dispensers and filling method
FI901024A0 (fi) * 1989-03-02 1990-02-28 Rocep Lusol Holdings Lagrings och foerdelningssystem av gas.
RU2016820C1 (ru) * 1991-06-29 1994-07-30 Анатолий Яковлевич Столяревский Способ создания избыточного давления газообразного диоксида углерода внутри рабочего объема упаковки для распыления вещества
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Also Published As

Publication number Publication date
WO2005054742A1 (fr) 2005-06-16
EP2327921A1 (fr) 2011-06-01

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