WO2004041976A1 - Method for increasing the efficiency of natural gas - Google Patents

Method for increasing the efficiency of natural gas Download PDF

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Publication number
WO2004041976A1
WO2004041976A1 PCT/EP2003/012471 EP0312471W WO2004041976A1 WO 2004041976 A1 WO2004041976 A1 WO 2004041976A1 EP 0312471 W EP0312471 W EP 0312471W WO 2004041976 A1 WO2004041976 A1 WO 2004041976A1
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WO
WIPO (PCT)
Prior art keywords
natural gas
additive
added
admixed
burned
Prior art date
Application number
PCT/EP2003/012471
Other languages
German (de)
French (fr)
Inventor
Robert Adler
Helmut Mayer
Original Assignee
Linde Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linde Aktiengesellschaft filed Critical Linde Aktiengesellschaft
Priority to AU2003283378A priority Critical patent/AU2003283378A1/en
Publication of WO2004041976A1 publication Critical patent/WO2004041976A1/en

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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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • 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
    • 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
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas

Definitions

  • the invention relates to a method for increasing the efficiency of natural gas, in particular of pressurized natural gas, which is used as an energy source for vehicles, aircraft, ships and all types of working machines, such as industrial trucks
  • Natural gas preferably in a compressed state of up to 200 bar and more, has long been offered and used as an energy source for vehicles, airplanes, ships and all types of working machines, such as industrial trucks.
  • the natural gas is usually stored on board the aforementioned means of transport or work machines in pressure containers or cylinders.
  • the object of the present invention is to provide a generic method which avoids the aforementioned disadvantages and thereby creates the possibility of giving the energy source natural gas an energy content comparable to the known energy sources.
  • a generic method is proposed, which is characterized in that at least one additive which gives the natural gas an ignition-enhancing property is admixed to the natural gas before combustion.
  • Hydrogen or acetylene are preferably used as additives.
  • the additives in question give the natural gas an ignition-enhancing property.
  • the consequence of this is that the natural gas-air mixture in the engine combustion chamber ignites more quickly, thereby increasing the torque, the power and the efficiency.
  • the method according to the invention for increasing the efficiency of natural gas is further proposed that the additive (s) be admixed in liquid and / or gaseous form, the admixture of the additive (s) generally being in gaseous form.
  • the amount of the additive (s) mixed in is preferably between 1 and 10% by volume of the amount of natural gas to be burned.
  • the additive or additives be added to the natural gas to be burned immediately before it is burned.
  • the additive or additives can be admixed to the natural gas during its (intermediate) storage, for example in the natural gas compressor station or the natural gas dispenser. It is also conceivable that a first part of the additive is added to the natural gas during its (intermediate) storage, while the remaining part of the additive is added to the natural gas to be burned immediately before it is burned.
  • the first additive is mixed with the natural gas during its (intermediate) storage and the second additive is added to the natural gas to be burned immediately before it is burned.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention relates to a method for increasing the efficiency of natural gas, especially pressurised natural gas which is used as an energy carrier for all types of vehicles, aeroplanes, boats and machine tools. According to the invention, an additive which lends the natural gas an ignition-reinforcing characteristic is added to the natural gas before the combustion. Hydrogen and acetylene are especially suitable as additives.

Description

Beschreibung description
Verfahren zum Erhöhen des Wirkungsgrades von ErdgasProcess for increasing the efficiency of natural gas
Die Erfindung betrifft ein Verfahren zum Erhöhen des Wirkungsgrades von Erdgas, insbesondere von unter Druck stehendem Erdgas, das als Energieträger für Fahrzeuge, Flugzeuge, Schiffe und Arbeitsmaschinen jeder Art, wie bspw. Flurförderzeuge, verwendet wirdThe invention relates to a method for increasing the efficiency of natural gas, in particular of pressurized natural gas, which is used as an energy source for vehicles, aircraft, ships and all types of working machines, such as industrial trucks
Erdgas, vorzugsweise in verdichtetem Zustand von bis zu 200 bar und mehr wird seit längerem als Energieträger für Fahrzeuge, Flugzeuge, Schiffe und Arbeitsmaschinen jeder Art, wie bspw. Flurförderzeuge, angeboten und verwendet. Die Speicherung des Erdgases an Bord der vorgenannten Verkehrsmittel bzw. Arbeitsmaschinen erfolgt im Regelfall in Druckbehältern bzw. -flaschen.Natural gas, preferably in a compressed state of up to 200 bar and more, has long been offered and used as an energy source for vehicles, airplanes, ships and all types of working machines, such as industrial trucks. The natural gas is usually stored on board the aforementioned means of transport or work machines in pressure containers or cylinders.
Erdgas besitzt im Gegensatz zu den Energieträgern Benzin und Diesel Vorzüge in den Bereichen Abgasreduzierung, Verbrauch sowie Preis.In contrast to petrol and diesel, natural gas has advantages in the areas of exhaust gas reduction, consumption and price.
Es bestehen jedoch gewisse Probleme beim Betrieb Erdgas-betriebener Motoren bzw. Triebwerke; insbesondere ist das Beschleunigungsvermögen von Fahrzeugen mit Erdgas-betriebenen Motoren nicht vergleichbar mit dem Beschleunigungsvermögen von Fahrzeuge mit Benzin- oder Diesel-betriebenen Motoren.However, there are certain problems with the operation of natural gas engines or engines; in particular, the acceleration capability of vehicles with natural gas-powered engines is not comparable to the acceleration capability of vehicles with gasoline or diesel-powered engines.
Die Ursache hierfür liegt im geringeren Energieinhalt des in den Motorbrennräumen erzeugten Erdgas- Luft-Gemisches und dem daraus resultierenden Drehmomentverlust. Generell kann davon ausgegangen werden, dass Erdgas-betriebene Motoren ca. 10 % weniger Drehmoment aufweisen. In der gleichen Größenordnung bewegt sich der Leistungs- und Wirkungsgradverlust gegenüber Benzin- oder Diesel-betriebenen Motoren.The reason for this is the lower energy content of the natural gas-air mixture generated in the engine combustion chambers and the resulting loss of torque. In general, it can be assumed that natural gas-powered engines have approximately 10% less torque. The loss in performance and efficiency compared to petrol or diesel engines is of the same order of magnitude.
Aufgabe der vorliegenden Erfindung ist es, ein gattungsgemäßes Verfahren anzugeben, das die vorgenannten Nachteile vermeidet und dadurch die Möglichkeit schafft, dem Energieträger Erdgas einen den bekannten Energieträgern vergleichbaren Energieinhalt zu geben. Zur Lösung dieser Aufgabe wird ein gattungsgemäßes Verfahren vorgeschlagen, das dadurch gekennzeichnet ist, dass dem Erdgas vor der Verbrennung wenigstens ein Zusatzstoff, der dem Erdgas eine zündverstärkende Eigenschaft verleiht, beigemischt wird.The object of the present invention is to provide a generic method which avoids the aforementioned disadvantages and thereby creates the possibility of giving the energy source natural gas an energy content comparable to the known energy sources. To achieve this object, a generic method is proposed, which is characterized in that at least one additive which gives the natural gas an ignition-enhancing property is admixed to the natural gas before combustion.
Hierbei kommen als Zusatzstoffe vorzugsweise Wasserstoff oder Acetylen zur Anwendung.Hydrogen or acetylene are preferably used as additives.
Die in Frage kommenden Zusatzstoffe verleihen dem Erdgas eine zündverstärkende Eigenschaft. Diese hat zur Folge, dass das Erdgas-Luft-Gemisch im Motorenbrennraum schneller gezündet und dadurch eine Erhöhung des Drehmomentes, der Leistung sowie des Wirkungsgrades erzielt werden kann.The additives in question give the natural gas an ignition-enhancing property. The consequence of this is that the natural gas-air mixture in the engine combustion chamber ignites more quickly, thereby increasing the torque, the power and the efficiency.
Eine Modifizierung der Erdgas-betriebenen Motoren und Triebwerke ist hierbei im Allgemeinen nicht erforderlich.It is generally not necessary to modify the natural gas-powered engines and engines.
Das erfindungsgemäße Verfahren zum Erhöhen des Wirkungsgrades von Erdgas weiterbildend wird vorgeschlagen, dass der oder die Zusatzstoffe in flüssiger und/oder gasförmiger Form beigemischt werden, wobei im Regelfall die Beimischung des oder der Zusatzstoffe in gasförmiger Form erfolgt.The method according to the invention for increasing the efficiency of natural gas is further proposed that the additive (s) be admixed in liquid and / or gaseous form, the admixture of the additive (s) generally being in gaseous form.
Vorzugsweise beträgt die Menge des bzw. der beigemischten Zusatzstoffe zwischen 1 und 10 Vol.-% der zu verbrennenden Erdgasmenge.The amount of the additive (s) mixed in is preferably between 1 and 10% by volume of the amount of natural gas to be burned.
Gemäß einer weiteren Ausgestaltung des erfindungsgemäßen Verfahrens zum Erhöhen des Wirkungsgrades von Erdgas wird vorgeschlagen, dass der oder die Zusatzstoffe dem zu verbrennenden Erdgas unmittelbar vor dessen Verbrennung beigemischt werden.According to a further embodiment of the method according to the invention for increasing the efficiency of natural gas, it is proposed that the additive or additives be added to the natural gas to be burned immediately before it is burned.
Zusätzlich oder alternativ können - entsprechend einer weiteren Ausgestaltung des erfindungsgemäßen Verfahrens - der oder die Zusatzstoff dem Erdgas während dessen (Zwischen)Speicherung - bspw. in der Erdgasverdichterstation bzw. der Erdgas-Zapfsäule - beigemischt werden. Denkbar ist femer, dass dem Erdgas während dessen (Zwischen)Speicherung ein erster Teil des Zusatzstoffes beigemischt wird, während der restliche Teil des Zusatzstoffes dem zu verbrennenden Erdgas unmittelbar vor dessen Verbrennung beigemischt wird.Additionally or alternatively, according to a further embodiment of the method according to the invention, the additive or additives can be admixed to the natural gas during its (intermediate) storage, for example in the natural gas compressor station or the natural gas dispenser. It is also conceivable that a first part of the additive is added to the natural gas during its (intermediate) storage, while the remaining part of the additive is added to the natural gas to be burned immediately before it is burned.
Kommen wenigstens zwei unterschiedliche Zusatzstoffe zur Anwendung, so ist eine Verfahrensweise denkbar, gemäß der der erste Zusatzstoff dem Erdgas während dessen (Zwischen)Speicherung und der zweite Zusatzstoffe dem zu verbrennenden Erdgas unmittelbar vor dessen Verbrennung beigemischt wird. If at least two different additives are used, a procedure is conceivable according to which the first additive is mixed with the natural gas during its (intermediate) storage and the second additive is added to the natural gas to be burned immediately before it is burned.

Claims

Patentansprüche claims
Verfahren zum Erhöhen des Wirkungsgrades von Erdgas, insbesondere von unter Druck stehendem Erdgas, das als Energieträger für Fahrzeuge, Flugzeuge, Schiffe und Arbeitsmaschinen jeder Art verwendet wird, dadurch gekennzeichnet, dass dem Erdgas vor der Verbrennung wenigstens ein Zusatzstoff, der dem Erdgas eine zündverstärkende Eigenschaft verleiht, beigemischt wird.Process for increasing the efficiency of natural gas, in particular of pressurized natural gas, which is used as an energy source for vehicles, airplanes, ships and work machines of all types, characterized in that the natural gas prior to combustion contains at least one additive which gives the natural gas an ignition-enhancing property confers, is admixed.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der Zusatzstoff Wasserstoff oder Acetylen ist2. The method according to claim 1, characterized in that the additive is hydrogen or acetylene
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der oder die Zusatzstoffe in flüssiger und/oder gasförmiger Form beigemischt werden.3. The method according to claim 1 or 2, characterized in that the additive (s) are admixed in liquid and / or gaseous form.
4. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Menge des oder der beigemischten Zusatzstoffe zwischen 1 und 10 Vol.-% der zu verbrennenden Erdgasmenge beträgt.4. The method according to any one of the preceding claims 1 to 3, characterized in that the amount of the additive (s) admixed is between 1 and 10% by volume of the amount of natural gas to be burned.
5. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der oder die Zusatzstoffe dem zu verbrennenden Erdgas unmittelbar vor dessen Verbrennung beigemischt werden.5. The method according to any one of the preceding claims 1 to 4, characterized in that the additive (s) are admixed to the natural gas to be burned immediately prior to its combustion.
6. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der oder die Zusatzstoffe dem Erdgas während dessen (Zwischen)Speicherung beigemischt werden.6. The method according to any one of the preceding claims 1 to 5, characterized in that the additive (s) are admixed to the natural gas during its (intermediate) storage.
7. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 6, dadurch gekennzeichnet, dass dem Erdgas während dessen (Zwischen)Speicherung ein erster Teil des Zusatzstoffes beigemischt wird, während der restliche Teil des Zusatzstoffes dem zu verbrennenden Erdgas unmittelbar vor dessen Verbrennung beigemischt wird. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 7, wobei dem zu verbrennenden Erdgas wenigstens zwei unterschiedliche Zusatzstoffe beigemischt werden, dadurch gekennzeichnet, dass der erste Zusatzstoff dem Erdgas während dessen (Zwischen)Speicherung und der zweite Zusatzstoffe dem zu verbrennenden Erdgas unmittelbar vor dessen Verbrennung beigemischt wird. 7. The method according to any one of the preceding claims 1 to 6, characterized in that a first part of the additive is added to the natural gas during its (intermediate) storage, while the remaining part of the additive is added to the natural gas to be burned immediately prior to its combustion. Method according to one of the preceding claims 1 to 7, wherein at least two different additives are added to the natural gas to be burned, characterized in that the first additive is added to the natural gas during its (intermediate) storage and the second additive is added to the natural gas to be burned immediately before its combustion becomes.
PCT/EP2003/012471 2002-11-08 2003-11-07 Method for increasing the efficiency of natural gas WO2004041976A1 (en)

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Application Number Priority Date Filing Date Title
AU2003283378A AU2003283378A1 (en) 2002-11-08 2003-11-07 Method for increasing the efficiency of natural gas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10252085.2 2002-11-08
DE2002152085 DE10252085A1 (en) 2002-11-08 2002-11-08 Increasing the efficiency of natural gas as a fuel comprises adding an ignition-enhancing additive to the natural gas before combustion

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2413824A (en) * 2004-05-07 2005-11-09 Statoil Asa Operating diesel-cycle i.c. engines on gaseous fuels with ignition-improvers
CN106566585A (en) * 2016-11-10 2017-04-19 临沂大学 Natural gas synergist
CN109609218A (en) * 2019-01-10 2019-04-12 江苏信驰能源科技有限公司 A kind of combustion of natural gas synergist

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004037945B3 (en) 2004-08-04 2005-08-18 FLM GMBH FOTO-, LICHT- UND MEßTECHNISCHES ZUBEHÖR Holder for a fishing rod comprises a stand with two legs connected to a third leg via a crossbeam, and a holding arm which rotates on the crossbeam

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5139002A (en) * 1990-10-30 1992-08-18 Hydrogen Consultants, Inc. Special purpose blends of hydrogen and natural gas
FR2745064A1 (en) * 1996-02-19 1997-08-22 Air Liquide Gas supply for flame cutter
US5666923A (en) * 1994-05-04 1997-09-16 University Of Central Florida Hydrogen enriched natural gas as a motor fuel with variable air fuel ratio and fuel mixture ratio control
US20020014068A1 (en) * 1999-12-13 2002-02-07 Mittricker Frank F. Method for utilizing gas reserves with low methane concentrations and high inert gas concentration for fueling gas turbines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5139002A (en) * 1990-10-30 1992-08-18 Hydrogen Consultants, Inc. Special purpose blends of hydrogen and natural gas
US5666923A (en) * 1994-05-04 1997-09-16 University Of Central Florida Hydrogen enriched natural gas as a motor fuel with variable air fuel ratio and fuel mixture ratio control
FR2745064A1 (en) * 1996-02-19 1997-08-22 Air Liquide Gas supply for flame cutter
US20020014068A1 (en) * 1999-12-13 2002-02-07 Mittricker Frank F. Method for utilizing gas reserves with low methane concentrations and high inert gas concentration for fueling gas turbines

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BAUER C G ET AL: "Effect of hydrogen addition on the performance of methane-fueled vehicles. Part I: effect on S.I. engine performance", INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, ELSEVIER SCIENCE PUBLISHERS B.V., BARKING, GB, vol. 26, no. 1, January 2001 (2001-01-01), pages 55 - 70, XP004221052, ISSN: 0360-3199 *
CHOUDHURI A R ET AL: "Characteristics of hydrogen-hydrocarbon composite fuel turbulent jet flames", INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, ELSEVIER SCIENCE PUBLISHERS B.V., BARKING, GB, vol. 28, no. 4, April 2003 (2003-04-01), pages 445 - 454, XP004401403, ISSN: 0360-3199 *
KARIM G A ET AL: "Methane-hydrogen mixtures as fuels", INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, ELSEVIER SCIENCE PUBLISHERS B.V., BARKING, GB, vol. 21, no. 7, 1 July 1996 (1996-07-01), pages 625 - 631, XP004040998, ISSN: 0360-3199 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2413824A (en) * 2004-05-07 2005-11-09 Statoil Asa Operating diesel-cycle i.c. engines on gaseous fuels with ignition-improvers
CN106566585A (en) * 2016-11-10 2017-04-19 临沂大学 Natural gas synergist
CN109609218A (en) * 2019-01-10 2019-04-12 江苏信驰能源科技有限公司 A kind of combustion of natural gas synergist
CN109609218B (en) * 2019-01-10 2020-04-03 江苏信驰能源科技有限公司 Natural gas combustion synergist

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AU2003283378A1 (en) 2004-06-07
DE10252085A1 (en) 2004-05-27

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