GB2445355A - Fuel and method of production thereof - Google Patents
Fuel and method of production thereof Download PDFInfo
- Publication number
- GB2445355A GB2445355A GB0700188A GB0700188A GB2445355A GB 2445355 A GB2445355 A GB 2445355A GB 0700188 A GB0700188 A GB 0700188A GB 0700188 A GB0700188 A GB 0700188A GB 2445355 A GB2445355 A GB 2445355A
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- Prior art keywords
- fuel
- bio
- fuels
- diesel
- solvent
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
- C10L1/026—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only for compression ignition
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/143—Organic compounds mixtures of organic macromolecular compounds with organic non-macromolecular compounds
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/182—Organic compounds containing oxygen containing hydroxy groups; Salts thereof
- C10L1/1822—Organic compounds containing oxygen containing hydroxy groups; Salts thereof hydroxy group directly attached to (cyclo)aliphatic carbon atoms
- C10L1/1824—Organic compounds containing oxygen containing hydroxy groups; Salts thereof hydroxy group directly attached to (cyclo)aliphatic carbon atoms mono-hydroxy
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
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- C10L1/182—Organic compounds containing oxygen containing hydroxy groups; Salts thereof
- C10L1/183—Organic compounds containing oxygen containing hydroxy groups; Salts thereof at least one hydroxy group bound to an aromatic carbon atom
- C10L1/1832—Organic compounds containing oxygen containing hydroxy groups; Salts thereof at least one hydroxy group bound to an aromatic carbon atom mono-hydroxy
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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- C10L1/1835—Organic compounds containing oxygen containing hydroxy groups; Salts thereof at least one hydroxy group bound to an aromatic carbon atom having at least two hydroxy substituted non condensed benzene rings
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
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- C10L1/185—Ethers; Acetals; Ketals; Aldehydes; Ketones
- C10L1/1852—Ethers; Acetals; Ketals; Orthoesters
- C10L1/1855—Cyclic ethers, e.g. epoxides, lactides, lactones
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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- C10L1/1883—Carboxylic acids; metal salts thereof carboxylic group attached to an aliphatic carbon atom polycarboxylic acid
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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- C10L1/192—Macromolecular compounds
- C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C10L1/196—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof
- C10L1/1963—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof mono-carboxylic
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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- C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C10L1/196—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof
- C10L1/1966—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof poly-carboxylic
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
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- C10L1/192—Macromolecular compounds
- C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C10L1/197—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid
- C10L1/1973—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid mono-carboxylic
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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- C10L1/198—Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds homo- or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon to carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid
- C10L1/1985—Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds homo- or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon to carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid polyethers, e.g. di- polygylcols and derivatives; ethers - esters
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- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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- C10L1/222—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
- C10L1/2222—(cyclo)aliphatic amines; polyamines (no macromolecular substituent 30C); quaternair ammonium compounds; carbamates
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- 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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- C10L1/223—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond having at least one amino group bound to an aromatic carbon atom
- C10L1/2235—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond having at least one amino group bound to an aromatic carbon atom hydroxy containing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
- Y02T50/678—Aviation using fuels of non-fossil origin
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Abstract
The present invention relates to a method of producing a fuel comprising mixing a first bio-fuel (for example bin-diesel) with a different second fuel in the presence of a co-solvent capable of effecting a substantially single phase solution of the bio-fuel and the second fuel. There may be two or more different second fuels, which may comprise a bin-fuel such as ethanol, butanol or hexane. The co-solvent may comprise tetrahydrofuran or an isobutyl alcohol. The co-solvent may act as a surfactant and may be amphiphilic. The method of production may also include a cold filtering step. One or more additives may also be added to the fuel. The fuel produced by the method is particularly suitable as a substitute to liquid fossil fuels, such as petrol and jet fuel.
Description
2445355
- 1 -DESCRIPTION FUEL AND METHOD OF PRODUCTION THEREOF The present invention relates to a fuel and a method of producing a fuel.
Conventional automotive fuels are hydrocarbon molecules derived from 5 fractional distillates of crude oil. Crude oil is a finite resource that is rapidly dwindling. Additionally, the burning of crude oil distillates has been shown to be increasing the concentration of atmospheric carbon dioxide, and there is growing concern about the consequences of climate change that this may cause. Bio-fuels represent a renewable alternative to these types of fuel.
10 Bio-ethanol is an example of a bio-fuel. Ethanol is produced by the fermentation of biomass products and is purified by filtration, distillation and then subjected to drying. It can be used to fuel conventional petrol engines.
Bio-diesel is another example of bio-fuel. Bio-diesel, which comprises fatty acid alkyl esters and can be manufactured from biologically produced triglycerides 15 such as vegetable oils, rendered animal fats and micro-algal oils. Conventional diesel engines can be fuelled with bio-diesel. Chemically unchanged triglycerides such as vegetable oils can be used to fuel diesel engines (Knoihe et ai, (1997) Biodiesei The use of vegetable oils and their derivatives as alternative diesel fuels. Fuels and Chemicals from Biomass. Washington, D.C.: American Chemical Society).
20 Many other chemicals can be produced from renewable resources and would be suitable for use as bio-fuels. Butanol. which can be used as an alternative to petroleum can be produced by biomass fermentation, usually by utilising the bacterium Clostridium acetohutylicum. Hexane can be produced by from sugars such as glucose, through the intermediate sorbitol.
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There is worldwide interest and considerable amounts of money being invested in finding a bio-fuel that can be used as an alternative to jet engine fuel. So far, there is no evidence to suggest that a bio-fuel having the key characteristics of jet engine fuel has been identified. Furthermore, methods to produce an alternative jet 5 engine fuel from bio-fuel and other renewable resources have proved to be either impractical and/or too expensive.
Co-solvents have been proposed in the context of biofuels, but only as a means to accelerate the mixing of vegetable oils with alcohols. For example, Dunn and Bagby have disclosed using co-solvent blending to reduce the viscosity of vegetable 10 oils with a low molecular weight alcohol (Dunn and Bagby (2000) JAOCS, Vol. 77, No. 12, 1315-1323). US 6,712,867 discloses a process for forming a single phase solution of triglyceride in an alcohol by employing a co-solvent, so as to produce a bio-fuel.
It is an object of the present invention to address one or more problems 15 associated with current bio-fuels. It is also an object of the present invention to provide an inexpensive method of producing fuels having at least a component of a bio-fuel. In particular, it is an object to provide a jet fuel, which has a bio-fuel component or is manufactured completely from bio-fuels.
In accordance with the present invention, there is provided a method of 20 producing a fuel comprising, mixing a first bio-fuel with two or more different second fuels in the presence of a co-solvent capable of effecting a substantially single phase solution of the first and second fuels.
The present invention therefore provides a fuel that can have a number of desirable characteristics from a range of existing fuels, which would not usually mix 25 to form a single-phase solution. One desirable characteristic which has been seen in
experiments involving the fuel of the present invention, is a reduced requirement for oxygen during combustion in an engine. The fuel is therefore suitable for use at high altitudes.
Whilst two or more bio-fuels may by mixed to form a "homogeneous" 5 mixture having a uniform appearance and composition throughout, the mixture may not necessarily be a single-phase mixture and may settle into separate phases over time. For example, if bio-diesel and bio-ethanol in equal volumes are placed in a blending machine and mixed vigorously and thoroughly, then a mixture will be formed that initially appears to be homogeneous. In time the mixture will separate 10 into two phases, and the ethanol light phase will float on the bio-diesel heavy phase. The provision of a co-solvent allows two or more fuels (one of which may be a bio-fuel) to form and remain in a single-phase. Without the co-solvent, the two or more fuels would either be immiscible or poorly miscible.
A "bio-fuel" should be taken to mean any liquid fuel that is derived at least in 15 part from a renewable source, for example bio-diesel.
The first bio-fuel may comprise bio-diesel.
In accordance with a further aspect of the present invention, there is provided a method of producing a fuel comprising, mixing a bio-diesel with one or more second fuels in the presence of a co-solvent capable of effecting a substantially single 20 phase solution of the bio-diesel and the one or more second fuels
Preferably, the second fuel is a bio-fuel. If needed, the fuel produced may include an existing crude oil distillate if a particular characteristic in the fuel is required and no bio-fuel (or combination of bio-fuels) would be able to provide the desired characteristic.
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The presence of the co-solvent enables a single-phase mixture to be formed between the fuels. The co-solvent may act as a surfactant. The co-solvent(s) used may potentially be any substance (or combination of substances) which is miscible with the different types of bio-fuels (and oil distillate fuels where appropriate) to be 5 mixed. It will be evident to the skilled addressee that the co-solvent used may vary depending upon which fuels are to be mixed together. The co-solvent may be amphiphilic, thereby combining hydrophilic and lipophilic properties so that it will be miscible with (i) long chain hydrocarbon molecules (such as vegetable oil and bio-diesel) and (ii) short chain alcohols. More preferably, the co-solvent is 10 tetrahydrofuran (THF) or an isobutyl alcohol (such as isobutanol, 2-methyl-l-
propanol). The co-solvent may also have certain desirable characteristics so that it is compatible with the engines which are to be powered by the fuel. For example, it is preferred that the co-solvent is ashless (i.e. it must burn without residue).
The method may further comprise the step of adding one or more additives to 15 the fuel. Preferably, an additive will be a multi-functional fuel additive. Any number of additives may be added to the fuel for a variety of purposes. For example, LUBRlZOL(r) 8041F is a multifunctional fuel additive formulated for use at an optimum treat rate of 200ppm m/m (190 ppm v/v). The product provides dispersant, demulsifier, anti-foam, anti-corrosion, anti-oxidant and conductivity improver 20 functionality.
An additive may be selected from one or more of the following additives: \ iscosity modifier, anti-oxidant/fuel stabiliser, biocide, corrosion inhibitor, injector cleaner, cold flow improver, demulsifier. antifoaming agent, dispersant,
antistatic, conductivity improver and cetane/combustion improver. The use of a
-5-
viscosity modifier will reduce the fuels viscosity at low temperature. An example of such a viscosity modifier would be malan-styrene copolymers.
One or more anti-oxidants may be used in accordance with the present invention and they may either be naturally occurring compounds (such as Carotenes 5 and the Vitamin E family i.e. Tocopherols and Tocotrienols), or synthetic compounds selected from one or more of the following: Baynox (20% 2,6-di-tert-butyl-4-methyiphenol, Vulkanox BKF (2,2'-methylenebis-(4-methyl-6-tert-butylphenol)) Vulkanox ZKF(2,2'-methylene-bis-(4-methyi-6-cyclohexylphenol)); Ionox 75 (2,6-di-tert-butylphenol 75%); Ionox 99 (2,6-ditert-butylphenol 99%); Ionox 103 (2,6-di-tert-10 butyl-N.Ndimethylamino-p-cresol); Ionox 220 (4,4'-methylene-bis-(2,6-di-tert-
butylphenol)); Ionol K65 (6-tert-butyl-2,4-dimethylphenol); MBP-K (2-tert-butyl-4-methylphenol); and MBM-K (2-tert-butyl-5-methvlphenol). A corrosion inhibitor, may for example, comprise dimerised fatty acids.
Biocides may be conventional compounds, or enzyme based anti-15 contamination additives i.e. enzymes derived from hydrocarbon utilising microorganisms which digest contaminants and prevent microbial growth. Soltron and Fuel Clean-BD are examples of such additives.
Potential cold flow improvers may be selected from one or more of the following improvers: Generally viscosity-modifying polymers such as carboxy-20 containing interpolymers. styrene-maleic anhydride copolymer, polymethacrylates, polyacrylates. nitrogen-containing polyacrylates, polv[alkyl(meth)acrvIates]. ethvlene-vinyl ester (acetate) copolymers, fumarate or itaconate polymers and copolymers. poK oxvalkv lene and polar nitrogen compounds.
If required, the method may further comprise a step of cold filtering the fuel. 25 If such a filtering step is employed, it is preferred that the cold filtering removes
-6-
particles larger than about 1 micron. It will be apparent to the skilled addressee that cold filtration improves the cold flow properties of the fuel. Cold filtration involves cooling the fuel to a temperature below its cloud point (i.e. a temperature at which the fuel appears cloudy rather than clear but yet it will still flow) and then filtering it using a very fine filter media. Filtering in this way (e.g. filtering out particles larger than 1 micron) removes the molecules that have started to crystallize. Performing the filtering lowers the cloud point, cold filter plugging point, pour point and importantly freeze point of the fuel.
The second fuel may be selected from one or more of the following group of bio-fuels: ethanol, butanol and hexane. It will be apparent that the precise formulation of the fuel will largely depend upon the fuels application and characteristics that is required. For example, the energy content of the fuel can be improved by addition of high-energy hydrocarbons, such as hexane. Certain types of bio-diesel with superior cold flow properties may be selected if the fuel is to be used in cold conditions. For example, bio-diesel produced from canola oil. Furthermore, bio-diesels produced from ethanol (fatty acid ethyl esters) may be selected, as they tend to have better cold flow characteristics than bio-diesels produced from methanol (fatty acid methyl esters).
The fuel will preferably be used as a liquid fossil fuel substitute. For example, it may be used as a replacement, substitute or blend stock for heating oil, petrol,
diesel. jet fuel and other aviation fuels. Therefore, by using a co-solvent, a fuel that possesses the key characteristics of jet engine fuel may be produced from bio-fuels which alone would not be suitable for use as jet engine fuel.
In accordance with a further aspect of the present invention, there is provided a substantial h single-phase fuel comprising a mixture of a bio-fuel, two or more
different second fuels and a co-solvent capable of effecting a substantially single phase solution of the bio-fuel and two or more different fuels. Such a fuel may be produced by the method as herein above described.
The bio-fuel may comprise bio-diesel.
In accordance with yet a further aspect of the present invention, there is prov ided a fuel comprising a mixture of bio-diesel, one or more second fuels and a co-solvent capable of effecting a substantially single phase solution of the bio-diesel and one or more second fuel.
Preferably, the different second fuel comprises a bio-fuel. The co-solvent may act as a surfactant. Such a surfactant may be amphiphilic and amphipathic. The fuel may further comprise one or more fuel additives. Such additives may be selected from one or more of the following additives: viscosity modifier, anti-oxidant, biocide, corrosion inhibitor, injector cleaner or cold flow improver, demulsifier, antifoaming agent, dispersant, antistatic/conductivity improver and cetane/combustion improver. Examples of additives are described herein above.
The first bio-fuel and at least one of the two or more second fuels may be selected from the following group of bio-fuels: ethanol, butanol and hexane. The fuel may be used as a replacement, substitute or blend stock for heating oil, petrol, diesel, jet fuel and other aviation fuels.
The present invention will now be described by way of example onh with reference to the following experimental example:
EXAMPLE 1
In this example, the ratio of bio-diesel to bio-ethanol that best matches the target specification of the required fuel is first determined. The required amount of bio-diesel and bio-ethanol are then mixed together vigorously and thoroughly. The co-
solvent is gradually added to this mixture whilst it is agitated until the mixture becomes clear i.e. it's appearance changes from that of a cloudy two-phase mixture to a clear single-phase mixture. The fuel produced has a lower freeze point, lower viscosity and lower flash point than standard bio-diesel.
In practice, the bio-diesel molecule may be a fatty acid methyl ester (methyl oleate) as shown below:
The long chain of carbon and hydrogen atoms (latty acid / hydrocarbon chain) terminates at the top right of the diagram with a methyl ester group. Here the final carbon of the fatty acid chain has a double bonded oxygen attached to it as well as a single bonded oxygen atom to which the methyl group is attached. Bio-diesel can be esters of any alcohol / fatty acid combination, such as an ethyl ester if ethanol is used to produce the bio-diesel.
An ethanol molecule is shown below:
i'
ryM.
- which chemically is no different to bio-ethanol. At the top right of this diagram is the hydroxide group i.e. the oxygen atom and attached hydrogen atom at the end of the chain.
5 A tetrahydrofuran (THF) molecule is shown below:
J
The structure of the THF molecule makes it a suitable co-solvent. The oxygen atom is said to be hydrophilic. It is able to form hydrogen bonds with water and alcohols. The remainder of the molecule is a hydrocarbon portion that is said to be 10 hydrophobic or lipophilic. This portion of the molecule is capable of solubilising many organic compounds. In simple terms, this molecule can combine with alcohols (such as ethanol) as well as molecules that are predominantly hydrocarbon (such as bio-diesel). Amphiphilic and amphipathic are words used to describe this type of behaviour and types of molecules that exhibit this behaviour i.e. molecules that 15 contain both hydrophilic and lipophilic groups. The addition of THF to a mixture of methyl oleate and ethanol allows a single phase solution of both components to be formed - which can be used as a fuel having a combination of desirable characteristics.
- 10-
As an alternative to THF, an isobutyl alcohol (such as isobutanol, 2-methyl-l-propanol) may be used as the co-solvent.
An isobutyl alcohol molecule is shown below:
5 Isobutyl alcohol itself has a fairly high heat of combustion ( 31.4 MJ/Kg) and is known to be stable under a number of conditions. Furthermore, isobutyl alcohol can be produced by fermentation.
EXAMPLE 2
Table 1 below shows a comparison between crude oil distillate jet fuel and a 10 range of bio-fuels.
Form
Energy
Viscosity
Flash point
Freeze point
Cu corrosion
Jet fuel
Liquid Ashless1
(*)Minimum 42.8 MJ/Kg1
Max 8 cSt
@ -20°C'
Miti
+38°C'
Max -47°C'
Strip 1 max1
Ethanol
Liquid Ashless2
27 MJ/Kg4
1.52 cSt @ +20°C2
+I4°C"
Max -114°C2
Butanol
Liquid Ashless2 !
36 MJ/Kg'
i i
!
3.64 cSt a +20°C2
i
+34°CJ
-89°C~
S
|
i
Hexane i
1 i
Volatile j liquid | Ash- i less4 i
44.7 MJ/Kg" j i
0.51 cSt a +20°C2
-22°C-
i
-95°C~
j
Strip 1 ; max" ,
Biodiesel !
!
Liquid , Ash- ; less" ;
-40 MJ/Kg'1 j i
-8 cSt 'a ,
-20CC4"
Generally above ! + 130°C4 !
Typically above > -12'C4
Strifj 1 max" i
Table 1
-11 -
Key
'Target specification 2Within specification 3Close to specification 5 4Outside specification
It can be seen that a fuel having similar characteristics (see key to Table 1) to that of jet fuel can be formulated by mixing a number of bio-fuels having specifications which are on target, within or close to those required. By using a co-solvent (such as 10 THF), a fuel that possesses the key characteristics of jet engine fuel can produced from bio-fuels that alone would not be suitable for use as jet engine fuel.
It is worthy to note that with regard to the energy content, bio-diesel and bio-ethanol molecules both contain oxygen and are considered oxygenated fuels. This is not the case with conventional jet engine fuel or most other fuels derived from crude 15 oil distillates. Oxygenated bio-fuels allow for leaner combustion and have been shown to yield a gain in thermal efficiency. For this reason, it is not considered necessary to have an energy content as high as that specified for jet engine fuel, if it is produced from oxygenated bio-fuels.
Claims (1)
- -12-CLAIMSA method of producing a fuel comprising, mixing a first bio-fuel with two or more different second fuels in the presence of a co-solvent capable of effecting a substantially single phase solution of the first and second fuels. A method as claimed in claim 1, wherein the first bio-fuel comprises bio-diesel.A method of producing a fuel comprising, mixing a bio-diesel with one or more second fuels in the presence of a co-solvent capable of effecting a substantially single phase solution of the bio-diesel and the one or more second fuels.A method as claimed in claim 3, wherein the second fuel comprises a bio-fuel.A method as claimed in any preceding claim, wherein the co-solvent acts as a surfactant.A method as claimed in any preceding claim, wherein the co-solvent is amphiphilic.A method as claimed in any preceding claim, wherein the co-solvent comprises tetrahydrofuran (THF).A method as claimed in any one of claims 1 to 6, wherein the co-solvent comprises an isobutyl alcohol.A method as claimed in any preceding claim, wherein the method further comprises the step of adding one or more additives to the fuel.A method as claimed in claim 9. wherein an additive is selected from one or more of the following additives: viscosity modifier, anti-oxidant fuel stabiliser, biocide. corrosion inhibitor, injector cleaner, cold flow- 13-improver, demulsifier, antifoaming agent, dispersant, antistatic/conductivity improver and cetane/combustion improver. A method as claimed in any preceding claim, wherein the method further comprises a step of cold filtering the fuel.A method as claimed in claim 11, wherein the cold filtering removes particles larger than about 1 micron.A method as claimed in any preceding claim, wherein the second fuel is selected from one or more of the following group of bio-fuels: ethanol, butanol and hexane.A method as claimed in any preceding claim, wherein the fuel is used as a liquid fossil fuel substitute.A method as claimed in claim 14, wherein the fossil fuel is petrol, diesel or jet fuel.A fuel comprising a mixture of a bio-fuel, two or more different second fuels and a co-solvent capable of effecting a substantially single phase solution of the bio-fuel and the two or more different fuels.A fuel as claimed in claim 16. wherein the bio-fuel comprises bio-diesel. A fuel comprising a mixture of bio-diesel. one or more second fuels and a co-solvent capable of effecting a substantially single phase solution of the bio-diesel and one or more second fuel.A fuel as claimed in an\ one of claims 16 to 18. wherein the second fuel comprises bio-fuel.A fuel as claimed in an) one of claims 16 to 19. wherein the co-solvent acts as a surfactant.- 14-A fuel as claimed in any one of claims 16 to 20, wherein the surfactant is amphiphilic.A fuel as claimed in any one of claims 16 to 21, wherein the fuel further comprises one or more fuel additives.A fuel as claimed in claim 22, wherein an additive is selected from one or more of the following additives: viscosity modifier, anti-oxidant, biocide, corrosion inhibitor, injector cleaner or cold flow improver.A fuel as claimed in any one of claims 16 to 25, wherein the second fuel is selected from one or more of the following group of bio-fuels: ethanol, butanol and hexane.A fuel as claimed in any one of claims 13 to 19, wherein the fuel is used as a substitute to petrol, diesel or jet fuel.
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GB0700188A GB2445355A (en) | 2007-01-05 | 2007-01-05 | Fuel and method of production thereof |
PCT/GB2008/050008 WO2008081202A1 (en) | 2007-01-05 | 2008-01-04 | Fuel and method of production thereof. |
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WO2019025561A1 (en) | 2017-08-03 | 2019-02-07 | Universität Regensburg | Fuel derived from renewable resources |
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WO2001012581A1 (en) * | 1999-08-18 | 2001-02-22 | David Gavin Brooke Boocock | Single-phase process for production of fatty acid methyl esters from mixtures of triglycerides and fatty acids |
WO2001062876A1 (en) * | 2000-02-26 | 2001-08-30 | Aae Technologies International Limited | Compositions |
WO2003078552A2 (en) * | 2002-03-14 | 2003-09-25 | The Lubrizol Corporation | Ethanol-diesel fuel composition and methods thereof |
GB2400859A (en) * | 2002-06-26 | 2004-10-27 | Indian Oil Corp Ltd | A fuel additive compositions for stabilising blends of ethanol and a hydrocarbon |
US20040244278A1 (en) * | 2003-04-28 | 2004-12-09 | Clariant Gmbh | Demulsifiers for mixtures of middle distillates with fuel oils of vegetable or animal origin |
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AU7093881A (en) * | 1980-05-22 | 1981-11-26 | Csr Chemicals Ltd. | Stabilised petrol-alcohol blends |
MY142383A (en) * | 2005-06-10 | 2010-11-30 | Malaysian Palm Oil Board Mpob | Palm- based biodiesel formulation |
EP1904610A1 (en) * | 2005-07-01 | 2008-04-02 | Yong Man Lee | Fuel composition containing bioethanol and biodiesel for internal combustion engine |
KR100655101B1 (en) * | 2006-06-09 | 2006-12-08 | 이용만 | Fuel composition containing bioethanol and biodiesel for internal combustion engine |
WO2007142475A1 (en) * | 2006-06-09 | 2007-12-13 | Yong Man Lee | Alternative fuel preventing phase separation for internal combustion engines |
-
2007
- 2007-01-05 GB GB0700188A patent/GB2445355A/en not_active Withdrawn
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2008
- 2008-01-04 WO PCT/GB2008/050008 patent/WO2008081202A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001012581A1 (en) * | 1999-08-18 | 2001-02-22 | David Gavin Brooke Boocock | Single-phase process for production of fatty acid methyl esters from mixtures of triglycerides and fatty acids |
WO2001062876A1 (en) * | 2000-02-26 | 2001-08-30 | Aae Technologies International Limited | Compositions |
WO2003078552A2 (en) * | 2002-03-14 | 2003-09-25 | The Lubrizol Corporation | Ethanol-diesel fuel composition and methods thereof |
GB2400859A (en) * | 2002-06-26 | 2004-10-27 | Indian Oil Corp Ltd | A fuel additive compositions for stabilising blends of ethanol and a hydrocarbon |
US20040244278A1 (en) * | 2003-04-28 | 2004-12-09 | Clariant Gmbh | Demulsifiers for mixtures of middle distillates with fuel oils of vegetable or animal origin |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019025561A1 (en) | 2017-08-03 | 2019-02-07 | Universität Regensburg | Fuel derived from renewable resources |
WO2020025686A1 (en) | 2017-08-03 | 2020-02-06 | Universität Regensburg | Fuel derived from renewable resources |
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WO2008081202A1 (en) | 2008-07-10 |
GB0700188D0 (en) | 2007-02-14 |
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