JP4649206B2 - 亜塩素酸ナトリウムを用いる廃ガスストリーム中のnoxを減少させる方法 - Google Patents
亜塩素酸ナトリウムを用いる廃ガスストリーム中のnoxを減少させる方法 Download PDFInfo
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- JP4649206B2 JP4649206B2 JP2004510926A JP2004510926A JP4649206B2 JP 4649206 B2 JP4649206 B2 JP 4649206B2 JP 2004510926 A JP2004510926 A JP 2004510926A JP 2004510926 A JP2004510926 A JP 2004510926A JP 4649206 B2 JP4649206 B2 JP 4649206B2
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- waste gas
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- sodium chlorite
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- 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
- B01D53/14—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 by absorption
-
- 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
- B01D53/60—Simultaneously removing sulfur oxides and 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
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
- Catalysts (AREA)
Description
a)前記廃ガスストリーム中に初期に存在するNOXの少なくとも一部を除去する工程;
b)前記廃ガスストリームからSOXの少なくとも一部を除去して、SOX減少廃ガスストリームを生じる工程;
c)被酸化性NOXの少なくとも一部を、それよりも酸化状態のより高いNO X に酸化させる条件で、前記SOX減少廃ガスストリームを、有効量の亜塩素酸ナトリウムに接触させる工程;および
d)前記酸化状態のより高いNO X の少なくとも一部を除去する工程
を含むことを特徴とするNOX濃度を減少させる方法が提供される。
(1)5NO+3ClO2+4H2O→5HNO3+3HCl
(2)4NO+3NaClO2+2H2O→4HNO3+3NaCl
廃ガスストリームへの亜塩素酸ナトリウムの添加をベンチスケール環境において試験した。廃ガスストリーム中に存在するSOX種およびNOX種の濃度、模擬スクラバー液を実験が始まる前に測定した。このデータを以下の表1に示している。熱電対装置を用いてストリームの初期温度を測定し、初期温度は68°Fであると観察された。廃ガスストリームの初期酸素濃度も測定し、3.0体積%O2であると決定された。
フルスケール稼働流動接触分解プロセス装置でも実施形態を試験した。この実験は、流動接触分解プロセス装置の湿式ガススクラバーに付属した既存の分離器ドラムに修正を全く加えずに行った。
Claims (11)
- NOXとSOXの両方を含有する流動接触分解プロセス装置からの廃ガスストリーム中のNOX濃度を減少させる方法であって、
a)前記廃ガスストリーム中に初期に存在するNOXの少なくとも一部を除去する工程;
b)前記廃ガスストリームからSOXの少なくとも一部を除去して、SOX減少廃ガスストリームを生じる工程;
c)被酸化性NOXの少なくとも一部を、それよりも酸化状態のより高いNO X に酸化させる条件で、前記SOX減少廃ガスストリームを、有効量の亜塩素酸ナトリウムに接触させる工程;および
d)前記酸化状態のより高いNO X の少なくとも一部を除去する工程
を含むことを特徴とするNOX濃度を減少させる方法。 - 前記工程b)を、水スクラビング、アルカリスクラビング、マグネシアスクラビング、アンモニウムスクラビングの湿式脱硫法によって行うことを特徴とする請求項1に記載のNOX濃度を減少させる方法。
- 工程b)を、酸化マンガンおよび活性炭よりなる群から選択される薬剤を用いる乾式脱硫法によって行うことを特徴とする請求項1に記載のNOX濃度を減少させる方法。
- 前記SOXを、湿式ガススクラビングによって除去することを特徴とする請求項2に記載のNOX濃度を減少させる方法。
- 前記亜塩素酸ナトリウムを、燃焼装置の湿式ガススクラバーより下流側の点で前記廃ガスストリームに接触させることを特徴とする請求項4に記載のNOX濃度を減少させる方法。
- 前記亜塩素酸ナトリウムを、湿式ガススクラビング装置に付属した分離ドラム内で前記廃ガスストリームに接触させることを特徴とする請求項4に記載のNOX濃度を減少させる方法。
- 前記亜塩素酸ナトリウムを、湿式ガススクラビング装置の分離ドラム内で、少なくとも1個の噴霧ノズルを通して前記廃ガスストリームに接触させることを特徴とする請求項4に記載のNOX濃度を減少させる方法。
- 前記廃ガスストリームに接触させる前に、前記亜塩素酸ナトリウムを水と混合することを特徴とする請求項1に記載のNOX濃度を減少させる方法。
- 前記酸化状態のより高いNO X の少なくとも一部を、アルカリ溶液吸収、還元溶液吸収、スクラビング、アンモニア注入、水による吸収および接触転化よりなる群から選択される方法によって除去することを特徴とする請求項1に記載のNOX濃度を減少させる方法。
- 前記酸化状態のより高いNO X の少なくとも一部を、アンモニアを水素と混合して注入するアンモニア注入によって除去することを特徴とする請求項9に記載のNOX濃度を減少させる方法。
- 前記酸化状態のより高いNO X の少なくとも一部を吸収するのに十分な量の脱イオン水を、前記亜塩素酸ナトリウムと合わせて注入することを特徴とする請求項8に記載のNOX濃度を減少させる方法。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US38656002P | 2002-06-05 | 2002-06-05 | |
US38649202P | 2002-06-05 | 2002-06-05 | |
US44226803P | 2003-01-24 | 2003-01-24 | |
PCT/US2003/014656 WO2003103810A1 (en) | 2002-06-05 | 2003-05-09 | Process for reducing the level of nox in waste gas streams using sodium chlorite |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005528210A JP2005528210A (ja) | 2005-09-22 |
JP4649206B2 true JP4649206B2 (ja) | 2011-03-09 |
Family
ID=29740817
Family Applications (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004510924A Pending JP2005528208A (ja) | 2002-06-05 | 2003-05-09 | 熱nox除去プロセスと組み合わせた亜塩素酸ナトリウムによるnoxの酸化 |
JP2004510926A Expired - Fee Related JP4649206B2 (ja) | 2002-06-05 | 2003-05-09 | 亜塩素酸ナトリウムを用いる廃ガスストリーム中のnoxを減少させる方法 |
JP2004510923A Expired - Fee Related JP4576227B2 (ja) | 2002-06-05 | 2003-05-09 | 熱nox除去方法と組み合わせた二酸化塩素によるnoxの酸化 |
JP2005504614A Pending JP2006507124A (ja) | 2002-06-05 | 2003-05-09 | NOxの選択的な非触媒的低減 |
JP2004510925A Pending JP2005528209A (ja) | 2002-06-05 | 2003-05-09 | 二酸化塩素を用いる廃ガスストリーム中のnoxを減少させる方法 |
Family Applications Before (1)
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JP2004510924A Pending JP2005528208A (ja) | 2002-06-05 | 2003-05-09 | 熱nox除去プロセスと組み合わせた亜塩素酸ナトリウムによるnoxの酸化 |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
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JP2004510923A Expired - Fee Related JP4576227B2 (ja) | 2002-06-05 | 2003-05-09 | 熱nox除去方法と組み合わせた二酸化塩素によるnoxの酸化 |
JP2005504614A Pending JP2006507124A (ja) | 2002-06-05 | 2003-05-09 | NOxの選択的な非触媒的低減 |
JP2004510925A Pending JP2005528209A (ja) | 2002-06-05 | 2003-05-09 | 二酸化塩素を用いる廃ガスストリーム中のnoxを減少させる方法 |
Country Status (11)
Country | Link |
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US (4) | US20040022707A1 (ja) |
EP (5) | EP1511553B1 (ja) |
JP (5) | JP2005528208A (ja) |
CN (4) | CN1304089C (ja) |
AT (4) | ATE380065T1 (ja) |
AU (5) | AU2003304074B8 (ja) |
CA (5) | CA2487382A1 (ja) |
DE (5) | DE60330861D1 (ja) |
ES (5) | ES2327921T3 (ja) |
TW (4) | TWI294306B (ja) |
WO (5) | WO2005009594A1 (ja) |
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