DE4237184A1 - Redn. of nitrogen oxide(s) in truck engine exhaust gases - comprises mixing hydrogen@ with exhaust gases contg. a specified excess of air - Google Patents

Redn. of nitrogen oxide(s) in truck engine exhaust gases - comprises mixing hydrogen@ with exhaust gases contg. a specified excess of air

Info

Publication number
DE4237184A1
DE4237184A1 DE4237184A DE4237184A DE4237184A1 DE 4237184 A1 DE4237184 A1 DE 4237184A1 DE 4237184 A DE4237184 A DE 4237184A DE 4237184 A DE4237184 A DE 4237184A DE 4237184 A1 DE4237184 A1 DE 4237184A1
Authority
DE
Germany
Prior art keywords
exhaust gases
redn
comprises mixing
contg
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE4237184A
Other languages
German (de)
Inventor
Andreas Rogowski
Rudolf Prof Heinisch
Ehrenfried Prof Schuett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ROGOWSKI ANDREAS 1000 BERLIN DE
Original Assignee
ROGOWSKI ANDREAS 1000 BERLIN DE
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 ROGOWSKI ANDREAS 1000 BERLIN DE filed Critical ROGOWSKI ANDREAS 1000 BERLIN DE
Priority to DE4237184A priority Critical patent/DE4237184A1/en
Publication of DE4237184A1 publication Critical patent/DE4237184A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/04—Adding substances to exhaust gases the substance being hydrogen
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Toxicology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Redn. of nitrogen oxides in truck exhaust gases comprises mixing hydrogen as reducing agent with oxygen-contg. exhaust gases from behind the motor. The conversion degree of NOx is up to 100% in excess air region (lambda being greater than 1). The hydrogen is pref. generated in an electrolysis cell carried on the vehicle. USE/ADVANTAGE - Used for removing nitrogen oxides from truck engine exhaust gases under normal operating conditions.

Description

Zur Stickoxidminderung in Kfz-Abgasen wird bisher ein Dreiwegekatalysator und eine Lambda-Sonde verwendet, die den im Abgas enthaltenen Sauerstoff mißt und den zur Verbrennung des Brennstoffs erforderlichen Luftbedarf regelt.A three-way catalytic converter and one have so far been used to reduce nitrogen oxide in vehicle exhaust gases Lambda probe used, which measures the oxygen contained in the exhaust gas and the Combustion of the fuel regulates the required air.

Bei diesem neuartigen Verfahren kann auf die Lambda-Sonde verzichtet werden. Stattdessen wird ein Wasserstofftank oder aber eine Elektrolysezelle in das Kfz eingebaut, um das zur Reduktion der Stickoxide erforderliche Reduktionsmittel bereitzustellen.With this new method, the lambda probe can be dispensed with. Instead a hydrogen tank or an electrolysis cell is installed in the motor vehicle in order to Reduction of nitrogen oxides required to provide reducing agents.

Das Reduktionsmittel wird unmittelbar hinter dem Motor dem Abgas beigemischt und anschließend über einen Wabenrohrkatalysator geleitet.The reducing agent is mixed with the exhaust gas immediately behind the engine and then passed over a honeycomb tube catalyst.

Maximal erreichbare Umsatzgrade für NOx sind bei den bisherigen Verfahren nur im Bereich um λ=1 bei einem verfügbaren Fenster von vier bis fünf Tausendstel möglich (W. Handrock Gas Wärme International, Band 36 (1987), S. 143).The maximum achievable degrees of conversion for NO x are only possible in the previous processes in the range around λ = 1 with an available window of four to five thousandths (W. Handrock Gas Wärme International, Volume 36 (1987), p. 143).

Dieses neuartige Verfahren erweist sich als geeignet, gerade auch im Luftüberschußbereich (λ<1) Umsatzgrade für NOx bis zu 100% unter bei Kfz technischen Betriebsbedingungen zu erzielen.This new method has proven to be suitable, especially in the excess air range (λ <1), to achieve conversion levels for NO x of up to 100% under technical operating conditions in motor vehicles.

Claims (3)

1. Dieses neuartige Verfahren ist dadurch gekennzeichnet, daß zur Stickoxidreduktion in sauerstoffhaltigen Abgasen Wasserstoff als Reduktionsmittel dem Abgasstrom hinter dem Motor beigemischt wird und Umsatzgrade für NOx von 100% auch im Luftüberschußbereich (λ<1) erreicht werden.1. This novel method is characterized in that for reducing nitrogen oxides in oxygen-containing exhaust gases, hydrogen is added as a reducing agent to the exhaust gas stream behind the engine and degrees of conversion for NO x of 100% can also be achieved in the excess air range (λ <1). 2. Dieses neuartige Verfahren ist nach Anspruch 1 dadurch gekennzeichnet, daß Umsatzgrade für NOx von 100% auch für λ<1 unter bei Kfz üblichen technischen Betriebsbedingungen erzielt werden.2. This novel method is characterized according to claim 1, that degrees of conversion for NO x of 100% can also be achieved for λ <1 under technical operating conditions customary in motor vehicles. 3. Dieses neuartige Verfahren ist nach Anspruch 1 dadurch gekennzeichnet, daß das zur Reduktion der Stickoxide benötigte Reduktionsmittel entweder aus einem Tank oder durch eine Elektrolysezelle im Kfz hergestellt werden kann. Der bei der Elektrolyse entstehende Sauerstoff kann dabei dann dem Motor zugeführt werden oder aber in die Umgebung abgeblasen werden.3. This novel method is characterized according to claim 1, that the reducing agent required to reduce the nitrogen oxides either from one Tank or by an electrolysis cell in the car can be made. The one at the Electrolysis resulting oxygen can then be supplied to the engine or but be blown off into the environment.
DE4237184A 1992-11-04 1992-11-04 Redn. of nitrogen oxide(s) in truck engine exhaust gases - comprises mixing hydrogen@ with exhaust gases contg. a specified excess of air Withdrawn DE4237184A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4237184A DE4237184A1 (en) 1992-11-04 1992-11-04 Redn. of nitrogen oxide(s) in truck engine exhaust gases - comprises mixing hydrogen@ with exhaust gases contg. a specified excess of air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4237184A DE4237184A1 (en) 1992-11-04 1992-11-04 Redn. of nitrogen oxide(s) in truck engine exhaust gases - comprises mixing hydrogen@ with exhaust gases contg. a specified excess of air

Publications (1)

Publication Number Publication Date
DE4237184A1 true DE4237184A1 (en) 1993-03-11

Family

ID=6472048

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4237184A Withdrawn DE4237184A1 (en) 1992-11-04 1992-11-04 Redn. of nitrogen oxide(s) in truck engine exhaust gases - comprises mixing hydrogen@ with exhaust gases contg. a specified excess of air

Country Status (1)

Country Link
DE (1) DE4237184A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003480A1 (en) * 1993-07-22 1995-02-02 Maschinen- Und Anlagenbau Grimma Gmbh (Mag) Process and device for cleaning exhaust gas of internal combustion engines and motor vehicle provided with such a device
EP0721794A1 (en) * 1995-01-13 1996-07-17 DORNIER GmbH Process and device for catalytic reduction of nitroxyde in exhaust gases of vehicles
DE19600558A1 (en) * 1996-01-09 1997-07-10 Daimler Benz Ag Process for reducing nitrogen oxides in exhaust gases from diesel engines
DE19638802A1 (en) * 1996-09-20 1998-03-26 Gerhart Prof Dr In Eigenberger Improving the cold-start behaviour of automobile catalysts
DE19850786A1 (en) * 1998-08-05 2000-02-17 Volkswagen Ag Regulation of a NOx storage catalytic converter
WO2007071303A1 (en) * 2005-12-20 2007-06-28 Reinhold Kirchhoff Process for removing carbon oxides from offgas streams
EP3124780A1 (en) 2015-07-29 2017-02-01 Fuelsave GmbH Vehicle drive system and method for operating a vehicle drive system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986350A (en) * 1974-03-06 1976-10-19 Reinhold Schmidt Method of and apparatus for improved methanol operation of combustion systems
SU1177520A1 (en) * 1983-03-02 1985-09-07 Vasilev Igor P Method of neutralizing combustion engine exhaust gasses
DE3412289A1 (en) * 1984-04-03 1985-10-10 Insumma GmbH, 8500 Nürnberg Apparatus for the catalytic reduction of nitrogen oxides
DE4230408A1 (en) * 1991-09-13 1993-03-18 Aisin Seiki Nitrogen oxide(s) redn. in oxygen@-contg. exhaust gas - by hydrogen@ addn. and catalytic redn.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986350A (en) * 1974-03-06 1976-10-19 Reinhold Schmidt Method of and apparatus for improved methanol operation of combustion systems
SU1177520A1 (en) * 1983-03-02 1985-09-07 Vasilev Igor P Method of neutralizing combustion engine exhaust gasses
DE3412289A1 (en) * 1984-04-03 1985-10-10 Insumma GmbH, 8500 Nürnberg Apparatus for the catalytic reduction of nitrogen oxides
DE4230408A1 (en) * 1991-09-13 1993-03-18 Aisin Seiki Nitrogen oxide(s) redn. in oxygen@-contg. exhaust gas - by hydrogen@ addn. and catalytic redn.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
N.N.: Hydrogen-Supplemented Fuel May Cut NOx. In: Automotive Engineering, Aug.1976,Vol.84, Nr.8,S.46-50 *
WPat Database: JP 52052192 A *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003480A1 (en) * 1993-07-22 1995-02-02 Maschinen- Und Anlagenbau Grimma Gmbh (Mag) Process and device for cleaning exhaust gas of internal combustion engines and motor vehicle provided with such a device
DE19548189C2 (en) * 1995-01-13 1999-05-27 Dornier Gmbh Process and device for the catalytic reduction of nitrogen oxides in vehicle exhaust gases
DE19548189A1 (en) * 1995-01-13 1996-07-18 Dornier Gmbh Catalytic redn. of nitrogen oxide(s) in exhaust gases
DE19547921A1 (en) * 1995-01-13 1996-07-18 Dornier Gmbh Catalytic redn. of nitrogen oxide(s) in exhaust gases
US5658449A (en) * 1995-01-13 1997-08-19 Dornier Gmbh Method and device for catalytic nitrogen oxide reduction of motor vehicle exhaust
DE19547921C2 (en) * 1995-01-13 1998-09-24 Dornier Gmbh Method and device for the catalytic NO reduction of motor vehicle exhaust gases
EP0721794A1 (en) * 1995-01-13 1996-07-17 DORNIER GmbH Process and device for catalytic reduction of nitroxyde in exhaust gases of vehicles
DE19600558A1 (en) * 1996-01-09 1997-07-10 Daimler Benz Ag Process for reducing nitrogen oxides in exhaust gases from diesel engines
DE19600558C2 (en) * 1996-01-09 1998-10-22 Daimler Benz Ag Process for reducing nitrogen oxides in exhaust gases from diesel engines
DE19638802A1 (en) * 1996-09-20 1998-03-26 Gerhart Prof Dr In Eigenberger Improving the cold-start behaviour of automobile catalysts
DE19850786A1 (en) * 1998-08-05 2000-02-17 Volkswagen Ag Regulation of a NOx storage catalytic converter
WO2007071303A1 (en) * 2005-12-20 2007-06-28 Reinhold Kirchhoff Process for removing carbon oxides from offgas streams
EP3124780A1 (en) 2015-07-29 2017-02-01 Fuelsave GmbH Vehicle drive system and method for operating a vehicle drive system
WO2017016969A1 (en) 2015-07-29 2017-02-02 Fuelsave Gmbh Vehicle drive system, and method for operating a vehicle drive system

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OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OR8 Request for search as to paragraph 43 lit. 1 sentence 1 patent law
8122 Nonbinding interest in granting licences declared
8105 Search report available
8139 Disposal/non-payment of the annual fee