Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
  • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
  • C10L3/12—Liquefied petroleum gas
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
  • C10L10/00—Use of additives to fuels or fires for particular purposes
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
  • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
  • C10L3/003—Additives for gaseous fuels
• • 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
  • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
• • 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]
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
  • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
  • C10L2290/24—Mixing, stirring of fuel components

Definitions

• the present invention relates to the use of liquefied gases and liquefied gas compositions for domestic use.
• International application WO 99/00466 discloses an alternative fuel for internal combustion engines, consisting of a mixture of several miscible fuels, at least one having a high octane number and at least one having a subscript. high cetane.
• One of these alternative fuels is composed of a liquefied mixture of at least 2 gases, one being self-inflammable by compression, the other being good oxidizer.
• this fuel consists of a mixture of liquefied petroleum gas (LPG), that is to say a mixture of hydrocarbons containing at most 4 carbon atoms, and of dimethyl ether (DME) with high cetane number.
• LPG liquefied petroleum gas
• DME dimethyl ether
• European Patent EP 928,326 describes the use in a dry combustion chamber with low NO x production of a fuel composition consisting of a mixture of three components: 15 to 93% by weight of dimethyl ether, 85% by weight of at least one alcohol and not more than 50% by weight of at least one component selected from the group consisting of water and C1 to C6 alkanes.
• the third component is selected from water, methane, propane and liquefied petroleum gas.
• This combustion chamber is intended for feeding a turbine for the production of energy.
• 6,202,601 describes a method for introducing two gaseous fuels into a cylinder of a combustion engine, one being the main fuel and the other the pilot fuel being able to self-ignite more easily than the main fuel.
• the main fuel is selected from natural gas, liquefied petroleum gas, biogas, landfill gas and hydrogen gas and the pilot fuel is dimethyl ether.
• the main fuel and the pilot fuel are introduced separately into the engine, the main fuel in a first stage, the pilot fuel in a second stage, these stages corresponding to different modes of charging the engine.
• Japanese Patent Application JP 60086195 discloses a gaseous fuel composition obtained by incorporating dimethyl ether (DME) into a mixture of alkane and alkylene hydrocarbons comprising 3 and 4 carbon atoms, at a rate of 5-30 parts by weight of DME in 100 parts by weight of hydrocarbons: this mixture has good storage stability and good combustion properties. According to a particular mode, the 2 components after being respectively liquefied, are mixed before being introduced into the gas bottle.
• the gaseous composition will comprise propane, n-butane or i-butane but preferably propane alone with dimethyl ether or diethyl ether. This latter mixture has in particular a better storage stability and improved combustion characteristics. It is even stated that this mixture is uniform and can burn continuously, without interruption which promotes its use as fuel for businesses or for domestic applications.
• the subject of the present invention is therefore the use of a composition of storable liquefied gases comprising dimethyl ether or DME mixed with a hydrocarbon mixture comprising at least one hydrocarbon containing 3 carbon atoms or propane and at least one hydrocarbon having 4 carbon atoms. carbon or butane, in which the gaseous mixture released at the outlet of the storage contains a constant concentration, set at a value of at most 50% by weight of DME until more than 50% by weight of the stored composition is released.
• compositions may be substituted for fossil liquefied gases currently available commercially for domestic use in all types of existing burner, or even for a motor use combustion remaining constant and stable.
• the content of DME in the gaseous mixture released is set at a value ranging from 5 to 30% by weight.
• the concentration of the DME is kept constant until more than 60% by weight of the stored gaseous mixture is released.
• the initial gaseous mixture is composed of 10 to 30% by weight of DME, 20 to 50% of propane and 50 to 20% of butane.
• the liquefied gas composition has a DME / butane ratio of at most 7 in the initial liquid mixture.
• the liquefied gas composition has a DME / propane ratio of at most 6 in the initial liquid mixture.
• the liquefied gas composition has DME / propane and DME / butane ratios which vary from 0.5 to 2.
• the initial liquid mixture is composed of 5 to 40% by weight of DME, 5 to 91% of propane and 90 to 4% of butane.
• the liquefied gas composition is obtained from liquefied gases of the DME, butane and propane type.
• the use according to the invention of the composition of liquefied gases is intended for the supply of apparatus for domestic use, including boiler, stove and heater operating by combustion in the presence of air regardless of the burner used.
• the liquefied gas composition is stored in a closed chamber under pressure, of the bottle or tank type.
• hydrocarbons with 3 carbon atoms is meant normal propane and isopropane hereinafter propane.
• hydrocarbons with 4 carbon atoms is meant normal butane and isobutane, hereinafter butane.
• propane is to ensure the start of combustion and ensure the stability thereof, it usually burning preferably before the DME and butane.
• the function of the butane burning after the DME is to ensure the continuous evaporation of the DME until it is completely removed from the storage, butane ensuring the maintenance of the flame.
• the liquefied gas according to the invention may contain other components such as by-products of the synthesis of DME which are water and methanol.
• DME by "commercial" DME is meant a product containing at least 95% of DME.
• propane is meant a mixture of hydrocarbons composed in the proportion of about 90% of propane, propene and for the surplus of ethane, ethylene, butanes and butenes.
• propane butane is meant a mixture of hydrocarbons composed mainly of butanes and butenes and containing less than 19% by volume of propane and propene.
• DME / butane in the gas mixture corresponding to liquefied gas mixtures in the precise storage capacity.
• DME / butane ratios of at most 7 and DME / propane ratios of at most 6 in the initial liquid mixture will be selected.
• the DME / butane and DME / propane ratios will vary from 0.5 to 2.
• the gas mixture introduced into the storage is composed of 5 to 40% by weight of DME, 5 to 91% by weight of propane and 4 to 90% by weight of butane.
• it is composed of 10 to 30% by weight of DME, 20 to 50% by weight of propane and 50 to 20% by weight of butane.
• An advantage of the liquid liquefied gas compositions used according to the invention is their stability during storage. Measurements made on different proportions of mixtures for a period of 52 days showed no evolution of the compositions.
• the liquefied gases used according to the invention can be stored according to known methods, for example in bottles, carboys, containers, tanks or tanks intended for the storage of gases and / or liquids under pressure.
• the filling is done according to the usual methods.
• the liquefied gases and the compositions described above are used for the supply of apparatus for domestic use, in particular for a boiler, a cooking stove and a heating appliance operating by combustion in the presence of air, whatever may be the case. the burner used. It is also possible to envisage the use of the liquefied gas and the compositions described above for the supply of internal combustion engines, in particular vehicles using onboard liquefied gas storage.
• This example concerns the evolution of the DME composition in the gaseous compositions during use.
• Table 3 composition of the gas phase E3 Composition of the liquid phase ( Figure 3)
• Table 4 composition of the liquid phase E3 B / Release of the mixture E4. Gas release rate: 0.9kg / h. Composition of the gas phase ( Figure 4)
• Table 7 composition of the El gas phase Composition of the liquid phase ( Figure 7)
• Table 9 composition of the gas phase E2 Composition of the liquid phase ( Figure 9)
• compositions like E5 corresponding to Figure 10.
• Composition of the gas phase
• composition of the liquid phase is Composition of the liquid phase:
• Table 12 composition of the liquid phase E2 * when 12 kg of gas were consumed. Analysis of the results Whatever the initial compositions of these different mixtures, during the release of the gas, very different evolutions of the compositions of the two phases are noted. In the best case of the invention, E5, there is first a decrease in the propane concentration, then that of the DME and finally an increase in that of butane.
• the gaseous mixture is enriched at the end of evaporation by up to 60% of DME, which is not favorable to the safety of the combustion.
• the gas phase contains less than 40% by weight of DME.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Feeding And Controlling Fuel (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2007
  • 2007-10-11 FR FR0707126A patent/FR2922217B1/fr not_active Expired - Fee Related
• 2008
  • 2008-10-09 WO PCT/FR2008/001416 patent/WO2009083668A2/fr not_active Ceased
  • 2008-10-09 JP JP2010528445A patent/JP2011500879A/ja active Pending
  • 2008-10-09 CN CN200880110895.7A patent/CN101827919B/zh not_active Expired - Fee Related
  • 2008-10-09 MY MYPI2010001640A patent/MY149874A/en unknown
  • 2008-10-09 KR KR1020107010226A patent/KR20100085973A/ko not_active Ceased
  • 2008-10-09 US US12/682,312 patent/US8388705B2/en not_active Expired - Fee Related
  • 2008-10-09 EP EP08868280A patent/EP2209877A2/de not_active Withdrawn
  • 2008-10-09 CA CA2702434A patent/CA2702434A1/en not_active Abandoned
  • 2008-10-09 MX MX2010003924A patent/MX2010003924A/es active IP Right Grant
• 2010
  • 2010-04-08 TN TN2010000153A patent/TN2010000153A1/fr unknown
  • 2010-05-05 ZA ZA2010/03156A patent/ZA201003156B/en unknown

Non-Patent Citations (1)

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