WO1998002234A1 - Procede de denitration de gaz d'echappement - Google Patents
Procede de denitration de gaz d'echappement Download PDFInfo
- Publication number
- WO1998002234A1 WO1998002234A1 PCT/JP1997/002388 JP9702388W WO9802234A1 WO 1998002234 A1 WO1998002234 A1 WO 1998002234A1 JP 9702388 W JP9702388 W JP 9702388W WO 9802234 A1 WO9802234 A1 WO 9802234A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- denitration
- exhaust gas
- temperature
- low
- catalyst
- Prior art date
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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- 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
- B01D53/8631—Processes characterised by a specific device
Definitions
- the present invention relates to a method for denitration of exhaust gas emitted from various combustion devices such as a boiler, a gas turbine, an engine, and a combustion furnace.
- An exhaust gas denitration method suitable for denitration in a part where the exhaust gas temperature is low will be introduced.
- Fig. 3 shows an example of a conventional exhaust gas treatment system.
- a denitration device 2 using a catalyst is provided at the outlet of boiler 1 to remove nitrogen oxides (NO x) from the exhaust gas, and air preheating is performed at the outlet of the denitration device 2
- the vessel 3 is installed to reduce the exhaust gas temperature to about 130.
- the exhaust gas that has passed through the air preheater 3 is removed by a dust collector 4, guided to a desulfurization unit 6 via a gas ⁇ ⁇ ⁇ gas heater 5, to remove sulfur oxides (SO x), and then discharged from a stack 7 to the atmosphere. Released into the interior.
- the means for removing the nitrogen oxides in the exhaust gas that have already been put into practical use, using a V z 0 5 was carried on T i O z catalyst, the NH 3 as the reducing agent, nitrogen oxides and nitrogen vapor
- a denitration system (ammonia reduction denitration system) using the selective catalytic reduction method (SCR), which decomposes into water, is installed at the boiler outlet for treatment.
- SCR selective catalytic reduction method
- a reaction temperature of 300 to 400 is required for the denitration device to function normally due to the performance of the catalyst.
- the invention is capable of efficiently removing nitrogen oxides in low-temperature exhaust gas, and is used as a countermeasure when the exhaust gas is low, such as when starting a combustion device, or for denitration in a low-temperature portion of the exhaust gas. It is an object of the present invention to provide a method for denitration of combustion exhaust gas which is suitable for the following.
- the present invention provides the following denitration method as means for achieving the above object.
- the method for denitrifying flue gas according to the present invention is a method for denitrifying flue gas discharged from a combustion device through an ammonia reduction denitration device, wherein a bypass having a low-temperature denitration device installed downstream of the ammonia reduction denitration device in the exhaust gas flow path.
- a bypass having a low-temperature denitration device installed downstream of the ammonia reduction denitration device in the exhaust gas flow path.
- the method for denitrifying flue gas of the present invention is a method for denitrifying flue gas discharged from a combustion device, wherein a plurality of series low-temperature denitration devices are provided in a portion where the temperature of the flue gas in the flue gas passage is from normal temperature to 200 ° C. It is installed in parallel and switched sequentially to perform denitration and regeneration of the catalyst in the low-temperature denitration equipment.
- a high denitration activity is exhibited in a relatively low temperature range in the initial stage of the reaction, but the activity maintenance time is short and a low temperature denitration device requiring a relatively long time for regeneration is used.
- the activity maintenance time is short and a low temperature denitration device requiring a relatively long time for regeneration is used.
- a boiler is started by providing a bypass in an exhaust gas flow path and installing the low-temperature denitration apparatus. Sufficient denitration can be performed even during periods when the exhaust gas temperature is low, such as during operation. (In addition, in an exhaust gas treatment system, when it is necessary to install a denitration device By installing a plurality of in parallel, high denitration efficiency can be achieved.
- FIG. 1 is a diagram showing one embodiment of a device configuration for carrying out the present invention.
- FIG. 2 is a diagram showing another embodiment of the device configuration for carrying out the present invention.
- FIG. 3 is a diagram showing an example of a conventional exhaust gas treatment system.
- the low-temperature denitration apparatus used in the method of the present invention includes, as catalysts, inorganic oxides such as titania, ceria, magnesium, polya, alumina, zirconia, yttria, copper oxide, copper ion exchange Y-type zeolite, and iron ion exchange.
- inorganic oxides such as titania, ceria, magnesium, polya, alumina, zirconia, yttria, copper oxide, copper ion exchange Y-type zeolite, and iron ion exchange.
- Metal-supported polymers such as metal-ion-exchanged zeolite such as Y-type zeolite, conoult ion exchange gamma-type zeolite, copper ion-exchange ZSM-5, and cobalt ion-exchange ZSM-5; copper-supported polyacrylonitrile; Metal complexes such as phosphorus and cobalt phthalocyanine, activated carbons such as coconut shell activated carbon and activated coke, and activated carbon fibers such as boria acrylonitrile, phenol, cellulose and pitch are used.
- activated carbon fiber is a preferable material because of its long activity duration.
- the activity of activated carbon and activated carbon fiber is improved by heat treatment. For example, activated carbon fibers are heat-treated at a temperature of 600 to 1200 in an atmosphere of an inert gas such as nitrogen, argon, and helium.
- Low-temperature denitration equipment filled with these catalysts shows sufficient denitration activity in the low temperature range of room temperature (for example, around 5'C) to 100'C, and has practical activity up to around 300 ° C. has, be Tei ⁇ up 2 0 0 P pm of nitrogen oxides below 5 0 PP m by introducing the addition of NH 3 or more equimolar to the nitrogen oxides in the exhaust gas it can.
- the low-temperature denitration apparatus used in the present invention has a high denitration activity in a low temperature range of room temperature (for example, about 5) to 100 ° C, and has a practical activity up to about 30 ° C.
- the activity duration of the catalyst is relatively short, at most about 6 hours, and requires a long time for regeneration. That is, usually, a reproduction time longer than the usage time is required. Therefore, it is suitable for denitration at a low temperature of the exhaust gas, such as when starting a combustion device, which has a relatively short use time and a long regeneration time.
- the regeneration of the catalyst in the low-temperature denitration apparatus used in the present invention is carried out by reducing nitrogen oxides on the catalyst by adding a reducing agent.
- a reducing agent one or more selected from the group consisting of ammonia, urine water, hydrocarbons, alcohols, and the like can be used.
- the hydrocarbon include hydrocarbons that are easily vaporized at room temperature, such as methane, ethane, ethylene, propane, and propylene, and preferably include hydrocarbons having 3 carbon atoms, such as propane and propylene. Examples include methanol, ethanol and the like, preferably methanol.
- the temperature in the atmosphere in which the reduction reaction occurs when the reducing agent is added is from room temperature (a temperature of about 5 ° C is also included) to 150, and the amount of water in the atmosphere in which the reduction reaction occurs is: 0 to 3% by volume.
- FIG. 1 shows one embodiment of a device configuration for carrying out the present invention.
- FIG. 1 shows an example in which the low-temperature denitration apparatus according to the present invention is applied to the boiler wandering gas treatment system shown in FIG.
- FIG. 2 shows another embodiment of the device configuration for carrying out the present invention.
- Fig. 2 shows an example in which the low-temperature denitration device according to the present invention is used as a main denitration device of a boiler exhaust gas treatment system.
- Fig. 2 (a) about 450 exhaust gas leaving boiler 1 passes through air preheater 3, dust collector 4, gas / gas heater 5, and desulfurization unit 6 in this order, about 50 Low temperature.
- a low-temperature denitration device 8 is installed downstream of the desulfurization device 6 as shown in FIG.
- a plurality of low-temperature denitration devices 8 are provided in parallel in the exhaust gas channel, and each low-temperature denitration device 8 has a damper 14 for introducing exhaust gas, A dambar 15 for deriving exhaust gas after denitration, a damper 16 for introducing regeneration gas, and a dambar 17 for deriving regeneration gas are surrounded.
- the dampers 14 and 15 are opened, the dampers 16 and 17 are closed, and the operation is performed.
- the apparatus is switched to another regenerated apparatus.
- the dampers 14 and 15 are closed and the dampers 16 and 17 are opened to perform regeneration.
- the devices are sequentially switched in this way to perform the denitration and regeneration, whereby high-efficiency denitration can be performed, and the time required for regeneration can be sufficiently secured.
- the installation position of the low-temperature denitration equipment is not particularly limited to the positions shown in FIGS.
- the amount of SOx is as small as possible.
- Example 2 The same test as in Example 1 was conducted with the processing gas temperature set to 100, and it was found that the same activity was exhibited when the temperature of the regenerated gas was set to 200'C. That is, 100 (TC gas was treated for 6 hours, then regeneration was performed with 200 gases, and the regeneration time was 2, 4, When the time was changed to 6, 8 hours, the respective NO removal rates were 20, 50, 92, and 94%, and after 10 times, they were 0, 10, 90, and 93%, respectively.
- 100 TC gas was treated for 6 hours, then regeneration was performed with 200 gases, and the regeneration time was 2, 4,
- the respective NO removal rates were 20, 50, 92, and 94%, and after 10 times, they were 0, 10, 90, and 93%, respectively.
- a treatment test was performed under the conditions shown in Table 2 using copper oxide as a catalyst.
- the used copper oxide was prepared as follows. A commercially available reagent, copper nitrate, was made into a 1 molar aqueous solution with distilled water, and 3N aqueous ammonia was gradually added dropwise to form a precipitate of copper hydroxide. The resulting precipitate was filtered, washed, dried at 110 ° C for 24 hours, and calcined in an electric furnace under airflow at 65 ° C for 2 hours to obtain a Cu0 form. The sample was sized to ⁇ 80 mesh and used as a sample.
- the NO removal rate in the first treatment was 99%, and was 90% after regeneration. After that, the NO removal rate was 90 ⁇ 2% after 18 repetitions (repetition for 1 hour for denitration and 12 hours for regeneration).
- the regeneration time was reduced to 2 hours at a regeneration gas temperature of 300 ° C.
- the air after the regeneration process has NO in each case and is used as boiler combustion air.
- Example 3 The same experiment as in Example 3 was performed using the catalyst as a Cu ion exchange Y-type zeolite.
- the catalyst used was Y-zeolite PCV-100, manufactured by PQ, USA, dispersed in a 1 M aqueous solution of copper nitrate, adjusted to pH 8.5 with aqueous ammonia, stirred for 3 hours, filtered and washed Then, after drying at 110 ° C. for 24 hours, the mixture was heated and calcined at 65 ° C. for 1 hour in an electric furnace under air flow to obtain a Cu ion-exchanged zeolite (Cu—Y).
- Cu—Y Cu ion-exchanged zeolite
- the NO removal rate in the treatment of the first ID was 95%, and was 92% after regeneration.
- the NO removal rate was 90 ⁇ 2% after 15 repetitions (repetition for 1 hour for denitration and 12 hours for regeneration).
- air containing 100 ppm of NH 3 was used during regeneration, there was no change in regeneration time, but the NO removal rate after regeneration was improved by 2 to 3%. This indicates that the deNOx reaction of the residual NO has slightly progressed due to NH 3 during regeneration.
- the regeneration time was reduced to 1.5 hours when air was used at an NH 3 concentration of 100 ppm and a temperature of 300 using both NH 3 addition and heating.
- there was no change in the NO removal rate after regeneration was 95%, and was 92% after regeneration.
- the NO removal rate was 90 ⁇ 2% after 15 repetitions (repetition for 1 hour for denitration and 12 hours for regeneration).
- a bypass with a low-temperature denitration device installed in the exhaust gas flow path after the ammonia reduction denitration device is provided, and the combustion device is started.
- the temperature of the exhaust gas is low, such as immediately after, when the ammonia reduction denitration device does not function sufficiently, the exhaust gas is passed through the bypass to perform denitration by the low temperature denitration device, and when the ammonia reduction denitration device is fully functioning, the bypass is turned off.
- a method for denitration of combustion exhaust gas wherein the denitration is performed by an ammonia reduction denitration apparatus when closed, and the catalyst in the low-temperature denitration apparatus is regenerated while the bypass is closed.
- a plurality of series of low-temperature denitration devices are installed in parallel in the portion where the exhaust gas temperature in the exhaust gas channel is from normal temperature to 200, and the denitration and A method for denitrifying combustion exhaust gas, comprising regenerating a catalyst in a low-temperature denitration device.
- the catalyst used in the low-temperature denitration apparatus is at least one of an inorganic oxide, a metal ion-exchanged zeolite, a metal-supported polymer, a metal complex, activated carbon and activated carbon fiber. 3.
- the catalyst in the low-temperature denitration apparatus is a pitch-based, polyacrylonitrile-based, cellulose-based, heat-treated at a temperature of 600 to 1200 under an inert gas atmosphere such as nitrogen, argon, and helium.
- an inert gas atmosphere such as nitrogen, argon, and helium.
- the reducing agent is at least one selected from the group consisting of ammonia, urea water, hydrocarbons and alcohols.
- the temperature in the atmosphere in which the reduction reaction occurs when the reducing agent is added is from room temperature to 150 ° C., and the amount of water in the atmosphere in which the reduction reaction occurs is 0 to 3% by volume. 5.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002260136A CA2260136C (en) | 1996-07-11 | 1997-07-10 | Exhaust gas denitration method |
DE69738296T DE69738296T2 (de) | 1996-07-11 | 1997-07-10 | Methode zur entstickung von abgas |
US09/214,657 US6383463B1 (en) | 1996-07-10 | 1997-07-10 | Exhaust gas denitration method |
EP97930743A EP0913185B1 (en) | 1996-07-11 | 1997-07-10 | Exhaust gas denitration method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8/182009 | 1996-07-11 | ||
JP8182009A JPH1024219A (ja) | 1996-07-11 | 1996-07-11 | 排ガス脱硝方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998002234A1 true WO1998002234A1 (fr) | 1998-01-22 |
Family
ID=16110737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/002388 WO1998002234A1 (fr) | 1996-07-10 | 1997-07-10 | Procede de denitration de gaz d'echappement |
Country Status (9)
Country | Link |
---|---|
US (1) | US6383463B1 (ja) |
EP (1) | EP0913185B1 (ja) |
JP (1) | JPH1024219A (ja) |
KR (2) | KR100327788B1 (ja) |
CN (1) | CN1159088C (ja) |
AT (1) | ATE378101T1 (ja) |
CA (1) | CA2260136C (ja) |
DE (1) | DE69738296T2 (ja) |
WO (1) | WO1998002234A1 (ja) |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6993900B2 (en) | 2002-10-21 | 2006-02-07 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
US6895747B2 (en) | 2002-11-21 | 2005-05-24 | Ford Global Technologies, Llc | Diesel aftertreatment systems |
US7093427B2 (en) | 2002-11-21 | 2006-08-22 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
US6834498B2 (en) | 2002-11-21 | 2004-12-28 | Ford Global Technologies, Llc | Diesel aftertreatment systems |
US6928806B2 (en) * | 2002-11-21 | 2005-08-16 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
US6823663B2 (en) | 2002-11-21 | 2004-11-30 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
US6981368B2 (en) * | 2002-11-21 | 2006-01-03 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
US6862879B2 (en) | 2002-11-21 | 2005-03-08 | Ford Global Technologies, Llc | Diesel aftertreatment system |
US6892530B2 (en) | 2002-11-21 | 2005-05-17 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
US7257945B2 (en) * | 2003-02-10 | 2007-08-21 | U T Battelle, Llc | Stripping ethanol from ethanol-blended fuels for use in NOx SCR |
DE102004061400B4 (de) * | 2004-12-21 | 2012-12-20 | Umicore Ag & Co. Kg | Verfahren zur Erzeugung eines Stromes heißer Verbrennungsabgase mit einstellbarer Temperatur, Apparatur zur Durchführung des Verfahrens und Verwendung der Verbrennungsabgase zur gezielten Alterung von Katalysatoren |
JP4774208B2 (ja) * | 2004-12-24 | 2011-09-14 | 株式会社都市樹木再生センター | 空気浄化装置 |
KR100623723B1 (ko) | 2005-04-22 | 2006-09-13 | 범아정밀(주) | 저온플라즈마-촉매 복합탈질장치 및 탈질방법 |
DE102006012206A1 (de) * | 2006-03-16 | 2007-09-20 | Linde Ag | Verfahren zur Entfernung von Stickoxiden aus Rauchgasen von Verbrennungsöfen |
US7527776B2 (en) * | 2007-01-09 | 2009-05-05 | Catalytic Solutions, Inc. | Ammonia SCR catalyst and method of using the catalyst |
US7767175B2 (en) * | 2007-01-09 | 2010-08-03 | Catalytic Solutions, Inc. | Ammonia SCR catalyst and method of using the catalyst |
US8802582B2 (en) * | 2007-01-09 | 2014-08-12 | Catalytic Solutions, Inc. | High temperature ammonia SCR catalyst and method of using the catalyst |
US7943097B2 (en) * | 2007-01-09 | 2011-05-17 | Catalytic Solutions, Inc. | Reactor system for reducing NOx emissions from boilers |
JP2011161329A (ja) * | 2010-02-05 | 2011-08-25 | Nippon Steel Corp | 焼結機排ガスの処理装置 |
FR2971435B1 (fr) * | 2011-02-11 | 2015-04-10 | Lab Sa | Procede de regeneration en ligne d'un catalyseur de denitrification de fumees, et installation d'epuration des fumees permettant de mettre en oeuvre ce procede |
GB2516554B (en) * | 2011-12-01 | 2018-09-12 | Johnson Matthey Plc | Catalyst for treating exhaust gas |
CN102658215B (zh) * | 2012-04-09 | 2013-12-25 | 南京工业大学 | 一种scr烟气脱硝催化剂再生方法 |
CN107583649A (zh) * | 2012-04-11 | 2018-01-16 | 庄信万丰股份有限公司 | 含有金属的沸石催化剂 |
CN102658013A (zh) * | 2012-05-18 | 2012-09-12 | 中国电力工程顾问集团华北电力设计院工程有限公司 | 燃煤锅炉低温scr固定床烟气脱硝装置及方法 |
EP2685066A1 (en) * | 2012-07-13 | 2014-01-15 | Alstom Technology Ltd | Gas turbine power plant with flue gas recirculation and catalytic converter |
FR2993479B1 (fr) * | 2012-07-18 | 2015-06-05 | Vinci Environnement | Installation et procede de traitement de gaz avec regeneration, pour echangeur interne a la regeneration. |
FR2993478A1 (fr) * | 2012-07-18 | 2014-01-24 | Vinci Environnement | Installation et procede de traitement de gaz avec regeneration et recyclage de gaz issu de la regeneration. |
CN102962079B (zh) * | 2012-11-27 | 2014-06-25 | 南京工业大学 | 一种废弃钒钛基scr烟气脱硝催化剂再生方法 |
CN104624049A (zh) * | 2014-12-12 | 2015-05-20 | 李可文 | 具有润滑作用的柴油机尾气还原剂、其应用及制备方法 |
CN104492507B (zh) * | 2014-12-25 | 2016-08-17 | 宜兴国电精辉环保设备有限公司 | 氟中毒废弃脱硝催化剂的再生方法 |
CN104801182B (zh) * | 2015-04-03 | 2016-05-18 | 青海省化工设计研究院有限公司 | 一种脱硝催化剂的再生方法 |
CN107413166B (zh) * | 2017-03-27 | 2020-04-28 | 郑经堂 | 循环利用炭基微孔材料处理氮氧化物废气的方法 |
CN107355301A (zh) * | 2017-07-06 | 2017-11-17 | 华电电力科学研究院 | 调峰燃气机组冷态启动移动式脱硝控制系统及方法 |
FR3071871B1 (fr) * | 2017-09-29 | 2020-02-07 | Continental Automotive France | Procede de reduction catalytique selective avec desorption d'ammoniac a partir d'une cartouche dans une ligne d'echappement |
CN107875851B (zh) * | 2017-11-08 | 2020-11-24 | 山东奥淼科技发展有限公司 | 一种应用于全负荷烟气脱硝的自催化还原脱硝系统 |
JP2021115502A (ja) * | 2020-01-23 | 2021-08-10 | 信六 西山 | 吸着剤再生方法 |
TWI826789B (zh) | 2020-06-05 | 2023-12-21 | 日商新川股份有限公司 | 打線接合裝置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4944969A (ja) * | 1972-09-05 | 1974-04-27 | ||
JPS558880A (en) * | 1979-01-12 | 1980-01-22 | Sumitomo Heavy Ind Ltd | Treatment of waste gas |
JPS57204221A (en) * | 1981-06-08 | 1982-12-14 | Hitachi Ltd | Denitrification of exhaust gas from gas turbine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3699683A (en) * | 1971-04-05 | 1972-10-24 | Chemical Construction Corp | Engine exhaust emission control system |
JPS544873A (en) * | 1977-06-14 | 1979-01-13 | Mitsubishi Chem Ind Ltd | Decomposing method for nitrogen oxides |
US5078973A (en) * | 1985-01-30 | 1992-01-07 | Babcoco-Hitachi Kabushiki Kaisha | Apparatus for treating flue gas |
JPH01139146A (ja) * | 1987-08-14 | 1989-05-31 | Mitsubishi Heavy Ind Ltd | 砒素分による劣化脱硝触媒の再生方法及び同装置 |
CA2051552A1 (en) | 1991-09-17 | 1993-03-18 | Stephen R. Dunne | Four phase process for controlling emissions during cold start of internal combustion engine |
-
1996
- 1996-07-11 JP JP8182009A patent/JPH1024219A/ja active Pending
-
1997
- 1997-07-10 DE DE69738296T patent/DE69738296T2/de not_active Expired - Lifetime
- 1997-07-10 US US09/214,657 patent/US6383463B1/en not_active Expired - Fee Related
- 1997-07-10 WO PCT/JP1997/002388 patent/WO1998002234A1/ja active IP Right Grant
- 1997-07-10 CA CA002260136A patent/CA2260136C/en not_active Expired - Fee Related
- 1997-07-10 AT AT97930743T patent/ATE378101T1/de active
- 1997-07-10 KR KR1019997000170A patent/KR100327788B1/ko not_active IP Right Cessation
- 1997-07-10 EP EP97930743A patent/EP0913185B1/en not_active Expired - Lifetime
- 1997-07-10 CN CNB971971935A patent/CN1159088C/zh not_active Expired - Lifetime
-
2001
- 2001-06-15 KR KR1020010033730A patent/KR100327790B1/ko not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4944969A (ja) * | 1972-09-05 | 1974-04-27 | ||
JPS558880A (en) * | 1979-01-12 | 1980-01-22 | Sumitomo Heavy Ind Ltd | Treatment of waste gas |
JPS57204221A (en) * | 1981-06-08 | 1982-12-14 | Hitachi Ltd | Denitrification of exhaust gas from gas turbine |
Also Published As
Publication number | Publication date |
---|---|
KR100327790B1 (ko) | 2002-03-15 |
DE69738296T2 (de) | 2008-09-18 |
DE69738296D1 (de) | 2007-12-27 |
CA2260136C (en) | 2003-07-08 |
EP0913185B1 (en) | 2007-11-14 |
JPH1024219A (ja) | 1998-01-27 |
US6383463B1 (en) | 2002-05-07 |
KR20000023711A (ko) | 2000-04-25 |
CN1227506A (zh) | 1999-09-01 |
EP0913185A4 (en) | 2002-07-24 |
CN1159088C (zh) | 2004-07-28 |
EP0913185A1 (en) | 1999-05-06 |
CA2260136A1 (en) | 1998-01-22 |
ATE378101T1 (de) | 2007-11-15 |
KR100327788B1 (ko) | 2002-03-15 |
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