ATE185284T1 - Kombiniertes sncr und scr verfahren zur reduzierung der stickstoffoxyde - Google Patents

Kombiniertes sncr und scr verfahren zur reduzierung der stickstoffoxyde

Info

Publication number
ATE185284T1
ATE185284T1 AT90912704T AT90912704T ATE185284T1 AT E185284 T1 ATE185284 T1 AT E185284T1 AT 90912704 T AT90912704 T AT 90912704T AT 90912704 T AT90912704 T AT 90912704T AT E185284 T1 ATE185284 T1 AT E185284T1
Authority
AT
Austria
Prior art keywords
nitrogen oxides
effluent
reducing nitrogen
scr process
sncr
Prior art date
Application number
AT90912704T
Other languages
English (en)
Inventor
John E Hofmann
William H Sun
Bryan K Luftglass
Original Assignee
Fuel Tech Inc
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 Fuel Tech Inc filed Critical Fuel Tech Inc
Application granted granted Critical
Publication of ATE185284T1 publication Critical patent/ATE185284T1/de

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
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Treating Waste Gases (AREA)
  • Catalysts (AREA)
  • Exhaust Gas After Treatment (AREA)
AT90912704T 1989-09-12 1990-08-30 Kombiniertes sncr und scr verfahren zur reduzierung der stickstoffoxyde ATE185284T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/408,122 US4978514A (en) 1989-09-12 1989-09-12 Combined catalytic/non-catalytic process for nitrogen oxides reduction

Publications (1)

Publication Number Publication Date
ATE185284T1 true ATE185284T1 (de) 1999-10-15

Family

ID=23614949

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90912704T ATE185284T1 (de) 1989-09-12 1990-08-30 Kombiniertes sncr und scr verfahren zur reduzierung der stickstoffoxyde

Country Status (8)

Country Link
US (1) US4978514A (de)
EP (1) EP0491726B1 (de)
JP (1) JPH05504906A (de)
AT (1) ATE185284T1 (de)
CA (1) CA1340451C (de)
DE (1) DE69033314T2 (de)
ES (1) ES2139569T3 (de)
WO (1) WO1991004224A1 (de)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5139754A (en) * 1989-09-12 1992-08-18 Fuel Tech, Inc. Catalytic/non-catalytic combination process for nitrogen oxides reduction
US5543123A (en) * 1990-08-01 1996-08-06 Nalco Fuel Tech Low pressure formation of a urea hydrolysate for nitrogen oxides reduction
JPH04243525A (ja) * 1991-01-22 1992-08-31 Toyota Motor Corp 内燃機関の排気浄化装置
US5281403B1 (en) * 1991-09-27 1996-06-11 Noell Inc Method for converting urea to ammonia
US5234477A (en) * 1992-04-28 1993-08-10 Shell Oil Company Method of reducing NOx emissions in gasoline vehicles
US5298230A (en) * 1992-05-01 1994-03-29 Nalco Fuel Tech Process for the efficient catalytic reduction of nitrogen oxides
US5233934A (en) * 1992-08-20 1993-08-10 Wahlco Environmental Systems, Inc. Control of NOx reduction in flue gas flows
US5269143A (en) * 1992-12-07 1993-12-14 Ford Motor Company Diesel engine turbo-expander
US5307772A (en) * 1992-12-16 1994-05-03 Ford Motor Company Redox catalysis of NOx in internal combustion engines
DE4423003C2 (de) * 1993-07-06 1999-01-21 Ford Werke Ag Verfahren und Vorrichtung zum Reduzieren von NO¶x¶ in den Abgasen von Kraftfahrzeugverbrennungsmotoren
US5354544A (en) * 1993-12-27 1994-10-11 Ford Motor Company Selective reduction of nitric oxide
DE69519243T2 (de) * 1994-02-15 2001-03-08 Tokyo Gas Co Ltd Verfahren und Katalysator zur Reinigung von NOx-enthaltenden Abgasen
US5465690A (en) * 1994-04-12 1995-11-14 A. Ahlstrom Corporation Method of purifying gases containing nitrogen oxides and an apparatus for purifying gases in a steam generation boiler
US5853683A (en) * 1995-06-19 1998-12-29 Public Services Electric & Gas Corporation Hybrid SCR/SNCR process
DE19600869A1 (de) * 1996-01-12 1997-07-17 Metallgesellschaft Ag Verfahren zur Entstickung von Rauchgasen
US5985222A (en) * 1996-11-01 1999-11-16 Noxtech, Inc. Apparatus and method for reducing NOx from exhaust gases produced by industrial processes
DE19652740C2 (de) * 1996-12-18 1999-03-11 Metallgesellschaft Ag Verfahren zur Entstickung der bei der Herstellung von Zement anfallenden Abgase
DE19652738A1 (de) * 1996-12-18 1998-06-25 Metallgesellschaft Ag Verfahren zur katalytischen Zersetzung von Stickoxiden
US6146605A (en) * 1999-07-26 2000-11-14 Hera, Llc Combined SCR/SNCR process
US6403046B1 (en) 1999-07-26 2002-06-11 Hera, Llc Pollution control systems using urea and ammonia for the control of emissions from the flue gas of fossil fuel burning facilities
DE60238486D1 (de) 2001-07-10 2011-01-13 Johnson & Johnson Res Pty Ltd Verfahren zur genetischen modifikation hämatopoetischer vorläuferzellen und verwendungen der modifizierten zellen
US20030202927A1 (en) * 2002-04-24 2003-10-30 Minkara Rafic Y. Reduction of ammonia in flue gas and fly ash
US8449288B2 (en) * 2003-03-19 2013-05-28 Nalco Mobotec, Inc. Urea-based mixing process for increasing combustion efficiency and reduction of nitrogen oxides (NOx)
US7670569B2 (en) * 2003-06-13 2010-03-02 Mobotec Usa, Inc. Combustion furnace humidification devices, systems & methods
JP4534729B2 (ja) * 2003-11-19 2010-09-01 日本化成株式会社 尿素水を用いる脱硝方法
US7537743B2 (en) * 2004-02-14 2009-05-26 Mobotec Usa, Inc. Method for in-furnace regulation of SO3 in catalytic NOx reducing systems
US8251694B2 (en) 2004-02-14 2012-08-28 Nalco Mobotec, Inc. Method for in-furnace reduction flue gas acidity
US7390471B2 (en) * 2005-11-17 2008-06-24 Siemens Power Generation, Inc. Apparatus and method for catalytic treatment of exhaust gases
US7410356B2 (en) 2005-11-17 2008-08-12 Mobotec Usa, Inc. Circulating fluidized bed boiler having improved reactant utilization
US8069824B2 (en) 2008-06-19 2011-12-06 Nalco Mobotec, Inc. Circulating fluidized bed boiler and method of operation
FR2934790B1 (fr) * 2008-08-08 2011-11-18 Lab Sa Procede et installation d'epuration de fumees de combustion contenant des oxydes d'azote
US8513153B2 (en) * 2009-04-22 2013-08-20 Uto Environmental Products Limited Fuel additive
US9132385B2 (en) 2009-11-05 2015-09-15 Johnson Matthey Inc. System and method to gasify aqueous urea into ammonia vapors using secondary flue gases
DE102010020277A1 (de) * 2010-05-11 2011-11-17 Johnson Matthey Catalysts (Germany) Gmbh Verfahren zur Reduzierung von Stickoxiden im Rauchgas einer Verbrennungsanlage sowie Verbrennungsanlage
CN104258718B (zh) * 2014-09-30 2016-02-24 东方电气集团东方锅炉股份有限公司 大型循环流化床锅炉实施选择性非催化还原脱硝的装置
CN105056758B (zh) * 2015-07-31 2017-07-04 湘潭大学 一种流化催化脱除氮氧化物的方法及装置
CN105214456A (zh) * 2015-10-30 2016-01-06 太仓东能环保设备有限公司 一种sncr-scr烟气脱硝工艺
CN105833681A (zh) * 2016-04-19 2016-08-10 廖引家 水泥新型脱硝方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5477277A (en) * 1977-12-02 1979-06-20 Mitsubishi Heavy Ind Ltd Method and apparatus for reducing nitrogen oxides in combustion exhaust gas
US4393031A (en) * 1979-02-22 1983-07-12 Werner Henke Process for efficiently removing oxides of nitrogen from exhaust gas
US4719092A (en) * 1985-10-04 1988-01-12 Fuel Tech, Inc. Reduction of nitrogen-based pollutants through the use of urea solutions containing oxygenated hydrocarbon solvents
DE3538259A1 (de) * 1985-10-28 1987-04-30 Kali Chemie Ag Katalytisches abgasbehandlungsverfahren
US4731231A (en) * 1986-05-05 1988-03-15 Robert A. Perry NO reduction using sublimation of cyanuric acid
US4780289A (en) * 1987-05-14 1988-10-25 Fuel Tech, Inc. Process for nitrogen oxides reduction and minimization of the production of other pollutants
US4830839A (en) * 1987-02-13 1989-05-16 Fuel Tech, Inc. Ammonia scrubbing
US4777024A (en) * 1987-03-06 1988-10-11 Fuel Tech, Inc. Multi-stage process for reducing the concentration of pollutants in an effluent
DE3830045C2 (de) * 1988-09-03 1993-09-30 Bayer Ag Verfahren zur Reduktion von in Abgasen enthaltenen Stickoxiden mittels eines zeolithhaltigen Katalysators
DK166377C (da) * 1989-02-10 1993-09-27 Haldor Topsoe As Fremgangsmaade til fjernelse af nitrogenoxider fra udstoedningsgasser fra turbiner

Also Published As

Publication number Publication date
CA1340451C (en) 1999-03-16
WO1991004224A1 (en) 1991-04-04
EP0491726A1 (de) 1992-07-01
DE69033314T2 (de) 2000-05-11
US4978514A (en) 1990-12-18
JPH05504906A (ja) 1993-07-29
ES2139569T3 (es) 2000-02-16
EP0491726A4 (en) 1993-04-14
DE69033314D1 (de) 1999-11-11
EP0491726B1 (de) 1999-10-06

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
EELA Cancelled due to lapse of time