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US20110000128A1 - Process For Conversion of Biogas to Liquid Fuels - Google Patents

Process For Conversion of Biogas to Liquid Fuels Download PDF

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Publication number
US20110000128A1
US20110000128A1 US12/682,511 US68251109A US2011000128A1 US 20110000128 A1 US20110000128 A1 US 20110000128A1 US 68251109 A US68251109 A US 68251109A US 2011000128 A1 US2011000128 A1 US 2011000128A1
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United States
Prior art keywords
liquid
biogas
gas
product
vessel
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Abandoned
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US12/682,511
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English (en)
Inventor
Rudolf W. Gunnerman
Peter W. Gunnerman
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Individual
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Individual
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Priority claimed from US12/098,513 external-priority patent/US20090249682A1/en
Priority claimed from US12/212,968 external-priority patent/US7897124B2/en
Application filed by Individual filed Critical Individual
Priority to US12/682,511 priority Critical patent/US20110000128A1/en
Publication of US20110000128A1 publication Critical patent/US20110000128A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/58—Fabrics or filaments
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B01J23/888—Tungsten
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    • C10G2/00—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon
    • C10G2/30—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen
    • C10G2/32—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen with the use of catalysts
    • C10G2/33—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen with the use of catalysts characterised by the catalyst used
    • C10G2/331—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen with the use of catalysts characterised by the catalyst used containing group VIII-metals
    • C10G2/332—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen with the use of catalysts characterised by the catalyst used containing group VIII-metals of the iron-group
    • C—CHEMISTRY; METALLURGY
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G50/00—Production of liquid hydrocarbon mixtures from lower carbon number hydrocarbons, e.g. by oligomerisation
    • 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
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
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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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
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    • C10L1/06—Liquid carbonaceous fuels essentially based on blends of hydrocarbons for spark 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
    • C10L1/08—Liquid carbonaceous fuels essentially based on blends of hydrocarbons for compression ignition
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    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
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    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
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    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
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Definitions

  • This invention lies in the field of biogas and its use as a source of energy and its conversion to liquid fuel.
  • biogas refers generally to gases resulting from the decomposition of organic matter in the absence of oxygen.
  • the decomposition can occur in disposal facilities for treating municipal waste and waste products in general, and the decomposition processes generally include anaerobic digestion and fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, and energy crops.
  • the decomposition can also occur naturally in geological formations.
  • biogas can include hydrogen, methane, and carbon monoxide, as well as relatively benign gases such as nitrogen and carbon dioxide. Natural gas is one form of biogas.
  • biogas can be converted to a clean-burning liquid fuel that can drive an engine or any other machinery or appliance that is typically run by a petroleum-based fuel.
  • clean-burning when used to describe a liquid fuel means a liquid fuel that upon combustion produces a gaseous combustion product that is at least substantially free of particulate emissions and odor.
  • the conversion of biogas to such a fuel in accordance with this invention is achieved by passing the biogas through a liquid reaction medium that contains a petroleum fraction, and doing so at an elevated but non-boiling temperature, while contacting the reaction medium with a transition metal catalyst.
  • the gaseous product that results from the contact contains a vapor that can be condensed to achieve the liquid fuel.
  • the process is operated on a continuous basis, the product is produced in a volume that far exceeds the starting volume of the reaction medium.
  • a preferred design for a chemical plant in which the process of this invention is performed is one that includes a gas-liquid reaction vessel and a product vessel, with a gas feed to the reaction vessel for inlet biogas and a port on the product vessel from which to draw liquid product.
  • Fluid transfer conduits connect the two vessels, including one such conduit transferring vaporized product from the reaction vessel through a condenser and then to the product vessel, and another such conduit transferring uncondensed gas from the product vessel back to the reaction vessel.
  • Mounted inside the reaction vessel are a grid of transition metal catalyst and gas distributors for both the feed gas and the recycle gas, both under the liquid level.
  • Optional features include a supplementary gas-phase reaction vessel downstream of the gas-liquid reaction vessel and upstream of the condenser, the supplementary vessel itself containing a grid of transition metal catalyst to react unreacted materials in the stream of vaporized product emerging from the reaction vessel. Further features of the plant design are described below.
  • the reaction medium in the gas-liquid reaction vessel is a liquid petroleum fraction
  • the liquid product emerging from the product vessel is a hydrocarbon fuel of a composition that is distinct from the liquid petroleum fraction.
  • the plant is operated on a continuous basis, and the reaction can be performed for a prolonged period of time, continuously producing product without adding further quantities of liquid petroleum fraction to the reaction vessel, although such further quantities can be added as needed to supplement the liquid level or compensate for liquid that has been entrained with the vaporized product. In either case, the product is readily produced in a volume that far exceeds the starting volume of the liquid petroleum fraction.
  • the FIGURE is a process flow diagram embodying an example of an implementation of the invention.
  • biogas is used herein to include any non-inert gas that can be produced by the biological degradation of organic matter.
  • prime examples of biogas are hydrogen, methane, and carbon monoxide, although other gaseous petroleum-based products such as ethane and ethylene, and decomposition products of agricultural waste such as wood chips, grains, grasses, leaves, and the like, are likewise included within the scope of the term.
  • the term is also used herein to include the same gases that are obtained from other sources.
  • methane associated with coal commonly known as “coal bed methane,” “coal mine methane,” and “abandoned mine methane.”
  • Such methane can be derived by bacterial activity or by heating. Gases containing 90% to 100% methane on a mole percent basis are of particular interest, and this includes natural gas, of which methane typically constitutes approximately 95 mole percent.
  • the petroleum fraction in the liquid reaction medium in the process of this invention includes fossil fuels, crude oil fractions, and many of the components derived from these sources.
  • the fossil fuels include any carbonaceous liquids that are derived from petroleum, coal, or any other naturally occurring material, as well as processed fuels such as gas oils and products of fluid catalytic cracking units, hydrocracking units, thermal cracking units, and cokers. Included among these fuels are automotive fuels such as gasoline, diesel fuel, jet fuel, and rocket fuel, as well as petroleum residuum-based fuel oils including bunker fuels and residual fuels.
  • Fractions or products in the diesel range can also be used, such as straight-run diesel fuel, feed-rack diesel fuel (diesel fuel that is commercially available to consumers at gasoline stations), light cycle oil, and blends of straight-run diesel and light cycle oil.
  • Crude oil fractions include any of the various refinery products produced from crude oil, either by atmospheric distillation or by vacuum distillation, as well as fractions that have been treated by hydrocracking, catalytic cracking, thermal cracking, or coking, and those that have been desulfurized.
  • fractions are light straight-run naphtha, heavy straight-run naphtha, light steam-cracked naphtha, light thermally cracked naphtha, light catalytically cracked naphtha, heavy thermally cracked naphtha, reformed naphtha, alkylate naphtha, kerosene, hydrotreated kerosene, gasoline and light straight-run gasoline, straight-run diesel, atmospheric gas oil, light vacuum gas oil, heavy vacuum gas oil, residuum, vacuum residuum, light coker gasoline, coker distillate, FCC (fluid catalytic cracker) cycle oil, and FCC slurry oil.
  • Preferred reaction media are mineral oil, diesel oil, naphtha, kerosene, gas oil, and gasoline.
  • the transition metal catalyst can be any single transition metal or combination of transition metals, either as metal salts, pure metals, or metal alloys, and can also be used in combination with metals other than transition metals.
  • Preferred catalysts for use in this invention are metals and metal alloys. Transition metals having atomic numbers ranging from 23 to 79 are preferred, and those with atomic numbers ranging from 24 to 74 are more preferred. Cobalt, nickel, tungsten, and iron, particularly in combination, are the most preferred. An example of an additional metal that can be included is aluminum.
  • the metallic catalyst is used in solid form and is preferably maintained below the liquid level in the reaction vessel as the biogas is bubbled through the liquid and through or past the catalyst.
  • the catalyst can assume any form that allows intimate contact with both the liquid petroleum fraction and the biogas and allows free flow of gas over and past the catalyst. Examples of suitable forms of the catalyst are pellets, granules, wires, mesh screens, perforated plates, rods, and strips. Granules and wires suspended across plates or between mesh matrices such as steel or iron wool are preferred for their relatively accessible high surface area. When granules are used, the granules can be maintained in a fluidized state in the reaction medium or held stationary in the form of a fixed bed.
  • a reactor can contain a single frame strung with wires in this manner or two or more such frames, depending on the size of the reactor.
  • a still further variation of the catalyst configuration that can be used is a coil or other wrapping of the metallic wire around or over piping that serves as a gas distributor for incoming gas.
  • the reaction vessel will typically contain one or more gas distributors for incoming gas, and in certain embodiments of the invention as explained below, the distributor(s) may have a wheel-and-spokes configuration or any other shape that includes a network of hollow pipes with an array of apertures to form the gas into small bubbles for release into the reaction vessel.
  • These pipes, or at least the apertures can be covered for example with a steel mesh or steel wool in combination with wires of the various metals listed above, to intercept the gas bubbles before they enter the reaction medium.
  • the term “metallic grid” is used herein to denote any fixed form of metallic catalyst that is submerged in the reaction medium and allows gas to bubble through the grid. The term thus encompasses fixed (as opposed to fluidized) beds, screens, open-weave wire networks, and any other forms described above.
  • the metal can be in bare form or supported on inert supports as ceramic coatings or laminae.
  • the reaction is performed under non-boiling conditions to maintain the liquid petroleum fraction used as the reaction medium in a liquid state and to avoid or at least minimize the amount of the liquid that is vaporized and leaves the reaction vessel with the product.
  • An elevated temperature i.e., one above ambient temperature, is used, preferably one that is about 80° C. or above, more preferably one within the range of about 100° C. to about 250° C.
  • the most preferred temperature range is about 100° C. to about 150° C., and in certain other embodiments, the most preferred temperature range is about 150° C. to about 200° C.
  • the operating pressure can vary as well, and can be either atmospheric, below atmospheric, or above atmospheric. The process is readily and most conveniently performed at either atmospheric pressure or a pressure moderately above atmospheric. Preferred operating pressures are those within the range of 1 atmosphere to 2 atmospheres.
  • the supplementary gas-phase reaction vessel referenced above as an optional feature of the invention is a flow-through vessel with a grid of metallic catalyst, in which the term “grid” has the same scope of meaning as stated above in connection with the gas-liquid reaction vessel.
  • the grid is not submerged in a liquid but instead supported within the vessel in the path of the vaporized product emerging from the gas-liquid reaction vessel.
  • the metals in the grid can be the same as those in the grid of the gas-liquid reaction vessel, or different combinations of transition metals.
  • a process flow diagram representing one example of a plant design for implementation of the present invention is presented in the attached FIGURE.
  • the reaction vessel 11 and the product vessel 12 are both shown. Each of these vessels is a closed cylindrical tank with a volumetric capacity of 2,000 gallons (U.S.) (7,570 cubic meters).
  • the reaction vessel 11 is charged with a petroleum fraction used as a liquid reaction medium 13 with a gaseous head space 14 above the liquid.
  • the liquid level is maintained by a level control 15 which is actuated by a pair of float valves inside the vessel.
  • the level control 15 governs a motor valve 16 on a drain line 17 at the base of the vessel.
  • Biogas is fed to the reaction vessel 11 underneath the liquid level at an inlet gas pressure of from about 5 psig to about 20 psig, through a gas inlet line 18 which is divided among two gas distributors 21 , 22 inside the reactor vessel, each distributor being large enough to deliver 1,000 scfm of gas to the vessel.
  • Each distributor spans substantially the full cross section of the vessel in either a grid configuration, a wheel-and-spokes configuration, or any other configuration that will support an array of outlet ports distributed across the cross section of the vessel. While two distributors are shown, the optimal number of distributors and outlet ports and the optimal configuration for any individual distributor will be readily determinable by routine experimentation, with greater or lesser numbers of distributors being optimal for reactor vessels of different capacities.
  • a resistance heater 23 is positioned in the reactor above the gas distributors, and a third gas distributor 24 is positioned above the resistance heater.
  • the third gas distributor 24 receives return gas from the product receiving vessel 12 as explained below.
  • the resistance heater 23 maintains the liquid at a temperature of approximately 240-250° F. (116-121° C.).
  • Each grid is a circular ring or apertured plate with metallic catalyst wires strung across the ring and supported by pegs affixed to the ring along the ring periphery.
  • metals that can be used for the ring and the pegs, one example is a cast iron ring and chromium pegs.
  • the sizes of the wires and the total length of each wire will be selected to achieve the maximal surface area exposed to the reaction medium while allowing gas to bubble through, and will be readily apparent to anyone skilled in the use of metallic or other solid-phase catalysts in a liquid-phase or gas-phase reaction.
  • a wire size is 1 mm in diameter.
  • the number of rings can vary, and will in most cases be limited only by the size of the reactor, the gas flow rate into the reactor, the desirability of maintaining little or minimal pressure drop across the rings, and economic factors such as the cost of materials.
  • seven rings are used, each wound with the same number and weight of wires.
  • the reaction can also be enhanced by placing screens of wire mesh between adjacent plates to assure that the gas bubbles contacting the catalyst wires are of a small size. Screens that are 40-mesh (U.S. Sieve Series) of either stainless steel or aluminum will serve this purpose.
  • Product gas is drawn from the head space 14 of the reaction vessel 11 and passed through a supplementary catalyst bed of the same catalyst material as the catalyst rings 25 of the reaction vessel.
  • the supplementary catalyst can be in the form of metallic wire screens, grids, or perforated plates similar to those of the catalyst grids 25 in the reactor vessel 11 .
  • the supplementary catalyst promotes the same reaction that occurs in the reaction vessel 11 for any unreacted materials that have been carried over with the product gas drawn from the reaction vessel.
  • Product gas emerging from the supplementary catalyst beds is passed through a condenser 33 and the resulting condensate 34 is directed to the product vessel 12 where it is introduced under the liquid level.
  • the liquid level in the product vessel 12 is controlled by a level control 41 which is actuated by a pair of float valves inside the vessel and governs a motor valve 42 on a liquid product outlet line 43 at the base of the vessel.
  • a level control 41 which is actuated by a pair of float valves inside the vessel and governs a motor valve 42 on a liquid product outlet line 43 at the base of the vessel.
  • Above the liquid level is a packed bed 44 of conventional tower packings. Examples are Raschig rings, Pall rings, and Intalox saddles; other examples will be readily apparent to those familiar with distillation towers and column packings.
  • the packing material is inert to the reactants and products of the system, or at least substantially so, and serves to entrap liquid droplets that may be present in the gas phase and return the entrapped liquid back to the bulk liquid in the lower portion of the vessel.
  • Unreacted gas 45 is withdrawn from the head space 46 above the packed bed by a gas pump 47 .
  • the pump outlet is passed through a check valve 48 and then directed to the reaction vessel 11 where it enters through the gas distributor 24 positioned between the resistance heater 23 and the catalyst grids 25 .
  • any known type of condenser can be used to condense the vaporized product from the reaction vessel.
  • types of condensers are shell-and-tube condensers and plate-and-frame condensers, and among the shell-and-tube condensers are horizontal tube condensers and vertical tube condensers.
  • Either co-current or counter-current condensers can be used, and the condensers can be air-cooled, water-cooled, or cooled by organic coolant media such as automotive anti-freeze (for example, 50% pre-diluted ethylene glycol) and other glycol-based coolants.
  • heating jackets Heating coils using steam or other heat-transfer fluids, and radiation heaters.
  • Heating of the reaction vessel can also be achieved, either in part or in whole, by recirculation of heat transfer fluid between the coolant side of the condenser and the reaction vessel.
  • the gas distributors for the inlet feed and the recycle gas can be any of a variety of types known in the art. Examples are perforated plates, cap-type distributors, and pipe distributors.
  • the liquid level controls can likewise be any of a variety of mechanisms known in the art.
  • Examples are float-actuated devices, devices measuring hydrostatic head, electrically actuated devices such as those differentiating liquid from gas by electrical conductivity or dielectric constant, thermally actuated devices such as those differentiating by thermal conductivity, and sonic devices based on sonic propagation characteristics.
  • This example illustrates the use of the present invention in a processing system in which the biogas is hydrogen and the reaction medium is mineral oil.
  • a catalyst material was prepared by placing the following between two pads of steel wool: aluminum wire, cobalt wire (an alloy containing approximately 50% cobalt, 10% nickel, 20% chromium, 15% tungsten, 1.5% manganese, and 2.5% iron), nickel wire, tungsten wire, and cast iron granules.
  • the material was placed in a reaction vessel over a perforated aluminum plate, and the vessel was charged with heavy mineral oil, submerging the catalyst material. The vessel contents were then heated to approximately 320-370° F.
  • the product was fed to a VAL6 Infrared Oil Heater (Shizuoka Seiki Co., Ltd., Japan) where it burned readily in air.
  • a VAL6 Infrared Oil Heater Shizuoka Seiki Co., Ltd., Japan
  • An attempt to use the liquid reaction medium at the start of the test (mineral oil) in the same oil heater was made, and the result was negative, i.e., the medium would not burn.
  • Example 2 illustrates the use of the present invention in a processing system in which the biogas is methane and the reaction medium is mineral oil. Except for the substitution of methane for hydrogen, the test was conducted in the same manner as that of Example 1, using the same materials and operating conditions. The results, measured as in Example 1, are listed in Table II below.
  • Example 1 The product was fed to a VAL6 Infrared Oil Heater (Shizuoka Seiki Co., Ltd., Japan) where it burned readily in air. As in Example 1, the liquid reaction medium at the start of the test (mineral oil) would not burn in the same oil heater.
  • VAL6 Infrared Oil Heater Shizuoka Seiki Co., Ltd., Japan
  • This example illustrates the use of the present invention in a processing system in which the biogas is 50% hydrogen and 50% carbon monoxide (by volume) and the reaction medium is mineral oil. Except for the substitution of the hydrogen/carbon monoxide mixture, the test was conducted in the same manner as that of Example 1, using the same materials and operating conditions. The results, measured as in Example 1, are listed in Table III below.
  • the product was fed to a VAL6 Infrared Oil Heater (Shizuoka Seiki Co., Ltd., Japan) where it burned readily in air.
  • a VAL6 Infrared Oil Heater Shizuoka Seiki Co., Ltd., Japan
  • the liquid reaction medium at the start of the test would not burn in the same oil heater.
  • This example illustrates the use of the present invention in a processing system in which the feed biogas was methane and the liquid petroleum fraction used in the reaction vessel was diesel fuel.
  • the equipment was a pilot version of the plant set forth in the FIGURE and described above, with a catalyst bed of aluminum wire, cobalt wire (an alloy containing approximately 50% cobalt, 10% nickel, 20% chromium, 15% tungsten, 1.5% manganese, and 2.5% iron), nickel wire, tungsten wire, and cast iron granules.
  • the reaction vessel was 19 inches (0.5 meter) in diameter and initially charged with ten gallons (39 liters) of diesel fuel. The diesel fuel was maintained at a temperature of 240-250° F.
  • the product was fed to a VAL6 Infrared Oil Heater (Shizuoka Seiki Co., Ltd., Japan) where it burned readily in air, emitting neither odor nor smoke.
  • This example illustrates the use of the present invention in a processing system in which the feed biogas was natural gas and the liquid petroleum fraction used in the reaction vessel was kerosene.
  • the feed biogas was natural gas
  • the liquid petroleum fraction used in the reaction vessel was kerosene.
  • liquid product was formed. The product was tested in both a diesel engine and a gasoline engine, and both engines started cold and ran effectively on the product.

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US12/212,968 US7897124B2 (en) 2008-09-18 2008-09-18 Continuous process and plant design for conversion of biogas to liquid fuel
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BRPI0910440A2 (pt) 2015-09-29
AR070939A1 (es) 2010-05-19
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MX2010010995A (es) 2011-03-01
CO6310969A2 (es) 2011-08-22
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EP2268379A1 (en) 2011-01-05
CN102006920A (zh) 2011-04-06
UA98225C2 (uk) 2012-04-25
ECSP10010595A (es) 2011-03-31
EA201001602A1 (ru) 2011-06-30
GEP20125688B (en) 2012-11-12

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