WO2005028103A1 - 劣化触媒の再生方法 - Google Patents
劣化触媒の再生方法 Download PDFInfo
- Publication number
- WO2005028103A1 WO2005028103A1 PCT/JP2004/014133 JP2004014133W WO2005028103A1 WO 2005028103 A1 WO2005028103 A1 WO 2005028103A1 JP 2004014133 W JP2004014133 W JP 2004014133W WO 2005028103 A1 WO2005028103 A1 WO 2005028103A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catalyst
- vanadium
- tungsten
- deteriorated
- regenerating
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/90—Regeneration or reactivation
- B01J23/92—Regeneration or reactivation of catalysts comprising metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
-
- 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
- B01D53/8628—Processes characterised by a specific catalyst
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/90—Regeneration or reactivation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/60—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20723—Vanadium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20776—Tungsten
Definitions
- the present invention relates to a denitration catalyst for catalytically reducing nitrogen oxides in exhaust gas using an ammonia reducing agent, and to a method for regenerating a degraded catalyst.
- Degraded deNOx catalysts include those used in dirty exhaust gas such as coal-fired exhaust gas and those used in clean exhaust gas such as gas turbine exhaust gas.
- Japanese Patent No. 29946769 Japanese Patent Application Laid-Open No. 11-057410, Japanese Patent Application Laid-Open No. 2000-0-0.
- Japanese Patent No. 376634 Japanese Patent Application Laid-Open No. 2000-0-73635, Japanese Patent Application Laid-Open No. 10-235209, Japanese Patent Application Laid-Open No. 10-0668755, Japanese Patent Application Laid-Open No.
- the denitration catalyst is used for a long time to treat coal-fired exhaust gas and gas turbine exhaust gas, it will be included in exhaust gas and ash.
- Deterioration components such as calcium, calcium, sodium, arsenic, and zeolite cause activity degradation, and vanadium and tungsten, which are active components, cause activity degradation due to thermal aggregation and the like.
- the regeneration method proposed above that is, a method in which the deteriorated catalyst is washed with an aqueous alkaline solution to re-support and regenerate the active component, a method in which the deteriorated catalyst is washed with an aqueous acid solution to re-support the active component and regenerated,
- the active ingredient is also eluted with the washing, so that the active ingredient must be re-supported. It was necessary to carry out the loading process separately. As a result, the treatment process and liquid management became complicated, and the amount of waste liquid increased, resulting in high costs.
- An object of the present invention is to provide a method for regenerating a denitration catalyst which has been degraded by a simple and simple method for the above problem.
- the present inventors have paid attention to the following in order to solve the above problem. (1) In the regeneration method using only acid or alkaline washing, the catalyst component is eluted and the performance is not completely restored, so the active component must be reloaded.
- the deteriorated catalyst can be washed with an aqueous acid solution containing vanadium and Z or tungsten, or by washing with an aqueous alkaline solution containing vanadium and / or tungsten.
- the regeneration method of washing with an aqueous acid solution containing vanadium and z or tungsten is more effective when the deterioration factor is mainly applied to a catalyst based on alkaline.
- the regeneration method of washing the deteriorated catalyst with an aqueous alkali solution containing vanadium and / or tungsten is more effective when the deterioration factor is mainly applied to a catalyst made of arsenic.
- the first one according to the present invention is a catalyst used in a method for reducing and removing NOX in waste gas using ammonia as a reducing agent, wherein the catalyst whose activity has been reduced by long-term use is vanadium and Z or By washing with an acid aqueous solution containing tungsten and having a pH of 4 or less, preferably pH 2 or less, mainly the deteriorating components such as alkali metals, alkaline earth metals, arsenic, and iron are removed.
- This is a method for regenerating a deteriorated catalyst, which comprises eluting vanadium and tungsten that have been degraded in activity and, at the same time, carrying vanadium, Z or tandasten as active components.
- Alkali metals include potassium and sodium
- alkaline earth metals include calcium.
- nitric acid hydrochloric acid and / or sulfuric acid as the acid.
- a second one according to the present invention is a catalyst used in a method for reducing and removing NOX in waste gas using ammonia as a reducing agent, wherein the catalyst whose activity has been reduced by long-term use is vanadium and / or By washing with an aqueous solution of tungsten containing pH 8 or more, preferably PH 10 or more, containing tungsten, the deterioration components are mainly alkali metals, arsenic, zeolite, and vanadium with reduced activity. Further, the present invention provides a method for regenerating a deteriorated catalyst, which comprises eluting tungsten and, at the same time, supporting vanadium and / or tungsten, which are active components.
- Alkali metal Is for example, calcium or sodium.
- FIG. 1 is a graph showing the performance of each regenerated catalyst of Example 1 and Comparative Example 1 before and after regeneration.
- FIG. 2 is a graph showing the performance of each of the regenerated catalysts of Example 2 and Comparative Example 2 before and after regeneration.
- Example 1 In order to specifically explain the present invention, some examples of the present invention and some comparative examples for comparison with the examples will be given.
- Example 1 In order to specifically explain the present invention, some examples of the present invention and some comparative examples for comparison with the examples will be given.
- the denitration catalyst was exposed to air containing about 25 ppm of arsenic oxide vapor as As at 350 ° C for 4 hours to degrade its performance, and a simulated arsenic-degraded catalyst was prepared.
- Aqueous NH 3 to the main Tabanaji Nsan'a Nmoni ⁇ beam (NH 4 V 0 3) to 0. 0 3 m 0 i / 1 , W 0 3 so that a concentration of 0. 5 m 0 1 Z 1, respectively
- the added aqueous solution pH 10.2 was prepared, and the arsenic degradation catalyst was immersed therein for 5 hours. After immersion, baking was performed at 400 ° C. for 1 hour, and performance recovery was measured. The result is shown in FIG. With this one processing operation, the performance was almost restored to the initial performance.
- Example 2 the row immersion with NH 3 aqueous solution main Tabanajin acid Anmoniumu also does not contain W 0 3 also ( ⁇ ⁇ ⁇ ⁇ . 2)
- the same operation as in Example 2 was performed except for the irrigation.
- the procedure was the same except that immersion was performed using only the results.
- the result is shown in figure 2.
- the active components are eluted during the processing, so the performance cannot be restored to the initial performance.
- the present invention provides a method for regenerating a denitration catalyst which catalytically reduces nitrogen oxides in exhaust gas using an ammonia reducing agent and has been deteriorated.
- the deteriorated denitration catalyst can be regenerated by a simple and simple method of one immersion treatment.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/572,311 US20070032373A1 (en) | 2003-09-18 | 2004-09-21 | Method of regenerating deteriorated catalyst |
KR1020067005185A KR101096985B1 (ko) | 2003-09-18 | 2004-09-21 | 열화 촉매의 재생 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003325676A JP4264643B2 (ja) | 2003-09-18 | 2003-09-18 | 劣化触媒の再生方法 |
JP2003-325676 | 2003-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005028103A1 true WO2005028103A1 (ja) | 2005-03-31 |
Family
ID=34372800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/014133 WO2005028103A1 (ja) | 2003-09-18 | 2004-09-21 | 劣化触媒の再生方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070032373A1 (ja) |
JP (1) | JP4264643B2 (ja) |
KR (1) | KR101096985B1 (ja) |
TW (1) | TWI367783B (ja) |
WO (1) | WO2005028103A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112609079A (zh) * | 2020-12-15 | 2021-04-06 | 武汉工程大学 | 一种失活脱硝催化剂再生废液处理回收方法及其应用 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2258479A1 (de) * | 2005-12-16 | 2010-12-08 | Evonik Energy Services GmbH | Verfahren zum Behandeln von Rauchgas-Katalysatoren |
ES2368512T3 (es) * | 2006-06-22 | 2011-11-17 | Hitachi Zosen Inova Ag | Regeneración de catalizadores scr de baja temperatura. |
DE102007020855A1 (de) | 2007-05-02 | 2008-11-06 | Evonik Energy Services Gmbh | Verfahren zum Reinigen von Rauchgasen aus Verbrennungsanlagen |
KR20080114051A (ko) | 2007-06-26 | 2008-12-31 | 한국전력공사 | 배연탈질 폐촉매의 재생 방법 및 그에 이용되는 배연탈질폐촉매의 세정 시간 결정 방법 |
DE102007030895A1 (de) * | 2007-07-03 | 2009-01-08 | Süd-Chemie AG | Abgaskatalysator für Salzsäure-haltige Abgase |
US7723251B2 (en) * | 2008-03-11 | 2010-05-25 | Evonik Energy Services Llc | Method of regeneration of SCR catalyst |
US7741239B2 (en) | 2008-03-11 | 2010-06-22 | Evonik Energy Services Llc | Methods of regeneration of SCR catalyst poisoned by phosphorous components in flue gas |
US20110015055A1 (en) * | 2009-07-17 | 2011-01-20 | Cooper Michael D | Method for removing a catalyst inhibitor from a substrate |
US20110015056A1 (en) * | 2009-07-17 | 2011-01-20 | Coalogix Technology Holdings Inc. | Method for removing a catalyst inhibitor from a substrate |
JP5313842B2 (ja) * | 2009-11-06 | 2013-10-09 | バブコック日立株式会社 | 脱硝触媒の再生方法 |
KR101175136B1 (ko) | 2010-04-19 | 2012-08-20 | 한국전력공사 | 판형 배연탈질 폐촉매의 재생방법 |
JP5535769B2 (ja) | 2010-06-02 | 2014-07-02 | 三菱重工業株式会社 | 排ガス処理触媒の再生方法及びこの方法を使用した排ガス処理触媒 |
JP5716188B2 (ja) | 2011-03-29 | 2015-05-13 | 三菱日立パワーシステムズ株式会社 | 砒素化合物の除去方法および除去装置、並びに脱硝触媒の再生方法および再生装置 |
CN109692714A (zh) * | 2017-10-20 | 2019-04-30 | 河南省格林沃特环保科技有限公司 | 一种废催化剂表面碱金属除去工艺 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6034743A (ja) * | 1983-08-08 | 1985-02-22 | Babcock Hitachi Kk | 使用済脱硝触媒体の再生処理方法 |
JPH04225842A (ja) * | 1990-12-26 | 1992-08-14 | Babcock Hitachi Kk | 排ガス脱硝用触媒の再生方法 |
JP2002273231A (ja) * | 2001-03-16 | 2002-09-24 | Kyushu Electric Power Co Inc | 劣化脱硝触媒の活性改良方法及び装置 |
JP2004074106A (ja) * | 2002-08-22 | 2004-03-11 | Ishikawajima Harima Heavy Ind Co Ltd | 触媒の再生方法 |
Family Cites Families (8)
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US4101635A (en) * | 1973-09-03 | 1978-07-18 | Nippon Oil Company Ltd. | Method for regenerating and recycling catalyst for oxidation of sulfur dioxide |
JPS5924662B2 (ja) * | 1977-11-12 | 1984-06-11 | 日東化学工業株式会社 | アンチモン含有酸化物触媒の再生法 |
US5071538A (en) * | 1990-06-20 | 1991-12-10 | Amoco Corporation | Process for regenerating spent heavy hydrocarbon hydroprocessing catalyst |
US5206194A (en) * | 1991-06-20 | 1993-04-27 | Union Oil Company Of America | Process for reactivating a deactivated crystalline molecular sieve group VIII metal catalyst |
JP3100191B2 (ja) * | 1991-09-02 | 2000-10-16 | 三菱重工業株式会社 | 排煙脱硝装置 |
DE4200248A1 (de) * | 1992-01-08 | 1993-07-15 | Basf Ag | Verfahren zur regenerierung von metalloxid-katalysatoren |
US6395665B2 (en) * | 1998-07-24 | 2002-05-28 | Mitsubishi Heavy Industries, Ltd. | Methods for the regeneration of a denitration catalyst |
US6162409A (en) * | 1999-03-15 | 2000-12-19 | Arthur P. Skelley | Process for removing Nox and Sox from exhaust gas |
-
2003
- 2003-09-18 JP JP2003325676A patent/JP4264643B2/ja not_active Expired - Fee Related
-
2004
- 2004-09-17 TW TW093128131A patent/TWI367783B/zh not_active IP Right Cessation
- 2004-09-21 KR KR1020067005185A patent/KR101096985B1/ko active IP Right Grant
- 2004-09-21 WO PCT/JP2004/014133 patent/WO2005028103A1/ja active Application Filing
- 2004-09-21 US US10/572,311 patent/US20070032373A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6034743A (ja) * | 1983-08-08 | 1985-02-22 | Babcock Hitachi Kk | 使用済脱硝触媒体の再生処理方法 |
JPH04225842A (ja) * | 1990-12-26 | 1992-08-14 | Babcock Hitachi Kk | 排ガス脱硝用触媒の再生方法 |
JP2002273231A (ja) * | 2001-03-16 | 2002-09-24 | Kyushu Electric Power Co Inc | 劣化脱硝触媒の活性改良方法及び装置 |
JP2004074106A (ja) * | 2002-08-22 | 2004-03-11 | Ishikawajima Harima Heavy Ind Co Ltd | 触媒の再生方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112609079A (zh) * | 2020-12-15 | 2021-04-06 | 武汉工程大学 | 一种失活脱硝催化剂再生废液处理回收方法及其应用 |
CN112609079B (zh) * | 2020-12-15 | 2022-11-29 | 武汉工程大学 | 一种失活脱硝催化剂再生废液处理回收方法及其应用 |
Also Published As
Publication number | Publication date |
---|---|
TWI367783B (en) | 2012-07-11 |
US20070032373A1 (en) | 2007-02-08 |
TW200518837A (en) | 2005-06-16 |
JP4264643B2 (ja) | 2009-05-20 |
KR20060076297A (ko) | 2006-07-04 |
KR101096985B1 (ko) | 2011-12-20 |
JP2005087901A (ja) | 2005-04-07 |
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