JP6720192B2 - 高硫黄煙道ガスの存在下の低温尿素−scr運転 - Google Patents
高硫黄煙道ガスの存在下の低温尿素−scr運転 Download PDFInfo
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- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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Description
4NH3+4NO+O2 → 4N2+6H2O (1)
に従って生じるものと説明される。
2NH3+NO+NO2 → 2N2+3H2O−高速反応 (2)
8NH3+6NO2 → 7N2+12H2O−低速反応 (3)
NH3+SO3+H2O → NH4HSO4 (4)
2NH3+SO3+H2O → (NH4)2SO4 (5)
2Ca(NO3)2 → 2CaO+4NO2+O2 (6)
CaO+SO3 → CaSO4 (7)
NO+NH4NO3 → NO2+N2+2H2O (10)
2NH3+NO+NO2 → 2N2+3H2O−高速反応 (2)
8NH3+6NO2 → 7N2+12H2O−低速反応 (3)
Claims (13)
- (a)尿素及び少なくとも一のNO2形成化合物を含む溶液であって、少なくとも一のNO2形成化合物が(i)金属硝酸塩、(ii)金属含有化合物とN2O4、N2O5若しくはそれらの混合物との混合物;又は(iii)(i)及び(ii)の混合物を含む、溶液、(b)SCR触媒、並びに(c)煙道ガスがSCR触媒と接触する前に溶液を煙道ガス流に導入するための装置を含む、20ppm以上の濃度でSOxを含む煙道ガス中の窒素酸化物排出を減少させるためのシステムであって、金属硝酸塩が、アルカリ土類金属硝酸塩、硝酸鉄、硝酸マンガン又はそれらの混合物であるシステム。
- 少なくとも一のNO2形成化合物が金属硝酸塩である、請求項1に記載のシステム。
- アルカリ土類金属硝酸塩が、硝酸カルシウム又は硝酸マグネシウムである、請求項1に記載のシステム。
- 金属硝酸塩が硝酸カルシウムを含む、請求項1から3のいずれか一項に記載のシステム。
- 尿素及び少なくとも一のNO2形成化合物を含む溶液が、Ca(NO3)2・4[OC(NH2)2]、5Ca(NO3)2・NH4NO3 .・10H2O又はそれらの混合物を含む、請求項1から4のいずれか一項に記載のシステム。
- 金属含有化合物が金属塩である、請求項1から5のいずれか一項に記載のシステム。
- 金属塩が、アルカリ土類金属塩、鉄塩、マンガン塩又はそれらの混合物である、請求項6に記載のシステム。
- 尿素−SCRシステムを連続して運転するための方法であって、煙道ガスがSCR触媒と接触する前に、尿素及び少なくとも一のNO2形成化合物を含む溶液を20ppm以上の濃度でSOxを含む煙道ガス流に導入することを含み、尿素−SCRシステムが約200から約350℃の範囲の温度であって、少なくとも一のNO2形成化合物が:(i)金属硝酸塩;(ii)金属含有化合物とN2O4、N2O5、若しくはそれらの混合物との混合物;又は(iii)(i)及び(ii)の混合物を含む、方法であって、金属硝酸塩が、アルカリ土類金属硝酸塩、硝酸鉄、硝酸マンガン又はそれらの混合物である方法。
- 尿素−SCRシステム中の重硫酸アンモニウムの形成を減少させるための方法であって、煙道ガスがSCR触媒と接触する前に、尿素及び少なくとも一のNO2形成化合物を含む溶液を煙道ガス流に導入することを含み、少なくとも一のNO2形成化合物が:(i)金属硝酸塩;(ii)金属含有化合物とN2O4、N2O5、若しくはそれらの混合物との混合物;又は(iii)(i)及び(ii)の混合物を含む、方法であって、金属硝酸塩が、アルカリ土類金属硝酸塩、硝酸鉄、硝酸マンガン又はそれらの混合物である方法。
- 尿素−SCRシステム中のSCR触媒の失活を減少させる方法であって、煙道ガスがSCR触媒と接触する前に、尿素及び少なくとも一のNO2形成化合物を含む溶液を煙道ガス流に導入することを含み、少なくとも一のNO2形成化合物が:(i)金属硝酸塩;(ii)金属含有化合物とN2O4、N2O5、若しくはそれらの混合物との混合物;又は(iii)(i)及び(ii)の混合物を含む、方法であって、金属硝酸塩が、アルカリ土類金属硝酸塩、硝酸鉄、硝酸マンガン又はそれらの混合物である方法。
- 煙道ガスが尿素−SCRシステムを使用して処理される、煙道ガスを生成するシステムの効率を増加させる方法であって、煙道ガスがSCR触媒と接触する前に、尿素及び少なくとも一のNO2形成化合物を含む溶液を、20ppm以上の濃度でSOxを含む煙道ガス流に導入することを含み、少なくとも一のNO2形成化合物が:(i)金属硝酸塩;(ii)金属含有化合物とN2O4、N2O5、若しくはそれらの混合物との混合物;又は(iii)(i)及び(ii)の混合物を含み、且つ(1)SCR触媒と接触する煙道ガスの温度及び(2)使用されるSCR触媒の容積のうちの少なくとも一が、煙道ガスがSCR触媒と接触する前に少なくとも一のNO2形成化合物を煙道ガス流に導入しない同様のシステムと比較して、減少される、方法であって、金属硝酸塩が、アルカリ土類金属硝酸塩、硝酸鉄、硝酸マンガン又はそれらの混合物である方法。
- 尿素−SCRシステムを使用して、硫黄を含む煙道ガスを処理するための方法におけるSCR反応速度を変化させる方法であって、煙道ガスがSCR触媒と接触する前に、尿素及び少なくとも一のNO2形成化合物を含む溶液を、20ppm以上の濃度でSOxを含む煙道ガス流に導入することを含み、少なくとも一のNO2形成化合物が:(i)金属硝酸塩;(ii)金属含有化合物とN2O4、N2O5、若しくはそれらの混合物との混合物;又は(iii)(i)及び(ii)の混合物を含み、且つ(1)SCR触媒と接触する煙道ガスの温度及び(2)使用されるSCR触媒の容積のうちの少なくとも一が、煙道ガスがSCR触媒と接触する前に少なくとも一のNO2形成化合物を煙道ガス流に導入しない同様のシステムと比較して、減少される、方法であって、金属硝酸塩が、アルカリ土類金属硝酸塩、硝酸鉄、硝酸マンガン又はそれらの混合物である方法。
- (a)尿素及び少なくとも一のNO2形成化合物を含む溶液源であって、少なくとも一のNO2形成化合物が:(i)金属硝酸塩;(ii)金属含有化合物とN2O4、N2O5,若しくはそれらの混合物との混合物;又は(iii)(i)及び(ii)の混合物を含む溶液源;(b)SCR触媒;並びに(c)煙道ガスがSCR触媒と接触する前に、溶液源からの溶液を煙道ガス流に導入するための装置を含む、発電所の煙道ガス中の窒素酸化物排出を減少させるためのシステムであって、金属硝酸塩が、アルカリ土類金属硝酸塩、硝酸鉄、硝酸マンガン又はそれらの混合物であるシステム。
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Application Number | Priority Date | Filing Date | Title |
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US201562109828P | 2015-01-30 | 2015-01-30 | |
US62/109,828 | 2015-01-30 | ||
PCT/IB2016/050462 WO2016120841A1 (en) | 2015-01-30 | 2016-01-29 | Low temperature urea-scr operation in the presence of high sulphur flue gas |
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JP2018506421A JP2018506421A (ja) | 2018-03-08 |
JP6720192B2 true JP6720192B2 (ja) | 2020-07-08 |
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JP2017538963A Active JP6720192B2 (ja) | 2015-01-30 | 2016-01-29 | 高硫黄煙道ガスの存在下の低温尿素−scr運転 |
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US (1) | US9782721B2 (ja) |
EP (1) | EP3250312B1 (ja) |
JP (1) | JP6720192B2 (ja) |
KR (1) | KR20170107461A (ja) |
CN (1) | CN107206315B (ja) |
BR (1) | BR112017015918A2 (ja) |
DE (1) | DE102016101581A1 (ja) |
DK (1) | DK3250312T3 (ja) |
GB (1) | GB2538128B (ja) |
RU (1) | RU2724607C2 (ja) |
WO (1) | WO2016120841A1 (ja) |
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US10650621B1 (en) | 2016-09-13 | 2020-05-12 | Iocurrents, Inc. | Interfacing with a vehicular controller area network |
US10215072B2 (en) * | 2017-03-23 | 2019-02-26 | GM Global Technology Operations LLC | Methods for controlling and detecting catalyst poisoning of selective catalytic reduction devices |
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DE3101026A1 (de) * | 1981-01-15 | 1982-08-26 | Engelhard Kali-Chemie Autocat Gmbh, 3000 Hannover | Bifunktionaler filter zur behandlung von abgasen |
GB9919013D0 (en) * | 1999-08-13 | 1999-10-13 | Johnson Matthey Plc | Reactor |
JP4664807B2 (ja) * | 2005-11-22 | 2011-04-06 | バブコック日立株式会社 | 粒状物質含有排ガスの浄化方法および装置 |
EP1923135A1 (en) * | 2006-09-25 | 2008-05-21 | Technical University of Denmark | Alkali resistent SCR catalysts |
FR2914688A1 (fr) | 2007-04-04 | 2008-10-10 | Jean Claude Fayard | Additif pour ameliorer le fonctionnement des systemes de reduction des oxydes d'azote par l'uree des gaz d'echappement des moteurs diesel |
ITMI20070742A1 (it) | 2007-04-12 | 2008-10-13 | Milano Politecnico | Apparato e procedimento per la riduzione del contenuto degli ossidi di azoto nei gas esausti di sistemi di combustione. |
EP2161070B1 (en) * | 2008-09-04 | 2013-11-27 | Haldor Topsoe A/S | Process and catalyst system for NOx reduction |
US8303919B2 (en) * | 2010-10-21 | 2012-11-06 | Babcock & Wilcox Power Generation Group, Inc. | System and method for protection of SCR catalyst and control of multiple emissions |
WO2014044318A1 (en) * | 2012-09-21 | 2014-03-27 | Haldor Topsøe A/S | Method and system for the removal of noxious compounds from engine exhaust gas |
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CN107206315A (zh) | 2017-09-26 |
JP2018506421A (ja) | 2018-03-08 |
GB2538128A (en) | 2016-11-09 |
WO2016120841A1 (en) | 2016-08-04 |
RU2724607C2 (ru) | 2020-06-25 |
DK3250312T3 (en) | 2020-09-28 |
US20160220954A1 (en) | 2016-08-04 |
US9782721B2 (en) | 2017-10-10 |
GB2538128B (en) | 2018-02-07 |
KR20170107461A (ko) | 2017-09-25 |
CN107206315B (zh) | 2020-06-30 |
BR112017015918A2 (pt) | 2018-03-27 |
GB201601625D0 (en) | 2016-03-16 |
RU2017130520A3 (ja) | 2019-04-15 |
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