CN113209979A - Novel coal-fired flue gas demercuration catalyst and preparation method thereof - Google Patents
Novel coal-fired flue gas demercuration catalyst and preparation method thereof Download PDFInfo
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- CN113209979A CN113209979A CN202110541681.2A CN202110541681A CN113209979A CN 113209979 A CN113209979 A CN 113209979A CN 202110541681 A CN202110541681 A CN 202110541681A CN 113209979 A CN113209979 A CN 113209979A
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- flue gas
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- 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
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/83—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
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- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/086—Decomposition of an organometallic compound, a metal complex or a metal salt of a carboxylic acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention discloses a novel coal-fired flue gas demercuration catalyst and a preparation method thereof, belonging to the technical field of demercuration catalyst preparation and comprising the following steps: (1) metal nitrate La (NO)3)3·6H2O、Ce(NO3)3·6H2O、Co(NO3)2·6H2Dissolving O in proper amount of distilled water, and adding complexing agent into the solution under magnetic stirring under the condition that the molar ratio of the complexing agent to the total cations is 1: 1.2; (2) while maintaining stirring, the solution was evaporated at 70 ℃ until viscous; (3) dehydrating the sample obtained in the step (2) in a common oven for 12h, then decomposing in air for 3h, and calcining for 3h to obtain the productBlack powder. The La-Co catalyst has high demercuration performance and poisoning resistance, and is a novel demercuration catalyst formula with excellent demercuration performance and high sulfur tolerance and water tolerance.
Description
Technical Field
The invention belongs to the technical field of preparation of demercuration catalysts, and particularly relates to a novel coal-fired flue gas demercuration catalyst and a preparation method thereof.
Background
For zero-valent mercury removal of carbon-based materials, whether activated carbon or emerging carbon materials, the original mercury removal efficiency is generally low, if an ideal efficiency is achieved, high operation cost is caused, and the recovery of the adsorbent is still a problem which is difficult to solve. Although the fly ash adsorbent has excellent economy, the active components in the fly ash are not fixed, so the fly ash adsorbent has good engineering value, but the universality is still to be examined.
Disclosure of Invention
The invention aims to provide a novel coal-fired flue gas demercuration catalyst and a preparation method thereof aiming at the existing problems.
The invention is realized by the following technical scheme:
a preparation method of a novel coal-fired flue gas demercuration catalyst comprises the following steps:
(1) metal nitrate La (NO)3)3·6H2O、Ce(NO3)3·6H2O、Co(NO3)2·6H2Dissolving O in proper amount of distilled water, and adding complexing agent into the solution under magnetic stirring under the condition that the molar ratio of the complexing agent to the total cations is 1: 1.2;
(2) while maintaining stirring, the solution was evaporated at 70 ℃ until viscous;
(3) and (3) dehydrating the sample obtained in the step (2) in a common oven for 12h, then decomposing in air for 3h, and calcining for 3h to obtain black powder.
Further, the ratio of cations described in step (1) is La: Ce: Co ═ 0.875:0.125: 1.
Further, the complexing agent in the step (1) is citric acid.
Further, the solution obtained after magnetic stirring in step (1) is a red transparent solution.
Further, the temperature in the oven is controlled to be 100 ℃ during the dehydration in the step (3).
Further, the temperature was controlled to 500 ℃ at the time of decomposition in air as described in the step (3).
Further, the temperature of the calcination in the step (3) is 700 ℃.
Compared with the prior art, the invention has the following advantages:
the application provides a novel coal-fired flue gas demercuration catalyst and a preparation method thereof, the La-Co catalyst has high demercuration performance and poisoning resistance, and is a novel demercuration catalyst formula with excellent demercuration performance and high sulfur tolerance and water tolerance.
Detailed Description
A preparation method of a novel coal-fired flue gas demercuration catalyst comprises the following steps:
(1) metal nitrate La (NO)3)3·6H2O、Ce(NO3)3·6H2O、Co(NO3)2·6H2Dissolving O in proper amount of distilled water, and adding complexing agent into the solution under magnetic stirring under the condition that the molar ratio of the complexing agent to the total cations is 1: 1.2;
(2) while maintaining stirring, the solution was evaporated at 70 ℃ until viscous;
(3) and (3) dehydrating the sample obtained in the step (2) in a common oven for 12h, then decomposing in air for 3h, and calcining for 3h to obtain black powder.
The ratio of cations La to Ce to Co is 0.875 to 0.125 to 1.
The complexing agent is citric acid.
The solution obtained after magnetic stirring was a red transparent solution.
The temperature in the oven was controlled at 100 ℃ during dehydration.
The temperature was controlled at 500 ℃ during decomposition in air.
The temperature of calcination was 700 ℃.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A preparation method of a novel coal-fired flue gas demercuration catalyst is characterized by comprising the following steps:
(1) metal nitrate La (NO)3)3·6H2O、Ce(NO3)3·6H2O、Co(NO3)2·6H2Dissolving O in proper amount of distilled water, and adding complexing agent into the solution under magnetic stirring under the condition that the molar ratio of the complexing agent to the total cations is 1: 1.2;
(2) while maintaining stirring, the solution was evaporated at 70 ℃ until viscous;
(3) and (3) dehydrating the sample obtained in the step (2) in a common oven for 12h, then decomposing in air for 3h, and calcining for 3h to obtain black powder.
2. The preparation method of the novel coal-fired flue gas demercuration catalyst according to claim 1, wherein the ratio of the cations in the step (1) is La: Ce: Co: 0.875:0.125: 1.
3. The preparation method of the novel coal-fired flue gas demercuration catalyst according to claim 1, wherein the complexing agent in the step (1) is citric acid.
4. The preparation method of the novel coal-fired flue gas demercuration catalyst according to claim 1, wherein the solution obtained after the magnetic stirring in the step (1) is a red transparent solution.
5. The method for preparing the novel coal-fired flue gas demercuration catalyst according to claim 1, wherein the temperature in the oven is controlled to be 100 ℃ during dehydration in the step (3).
6. The method for preparing the novel coal-fired flue gas demercuration catalyst according to claim 1, wherein the temperature in the decomposition in air in the step (3) is controlled to be 500 ℃.
7. The preparation method of the novel coal-fired flue gas demercuration catalyst according to claim 1, wherein the calcination temperature in the step (3) is 700 ℃.
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Citations (8)
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| CN101602018A (en) * | 2009-07-23 | 2009-12-16 | 上海交通大学 | The preparation method of rare-earth element doped composite metal oxide mercury removal catalyst |
| US20130045149A1 (en) * | 2011-08-15 | 2013-02-21 | Empire Technology Developement LLC | Oxalate sorbents for mercury removal |
| CN106140175A (en) * | 2016-06-24 | 2016-11-23 | 江苏安琪尔废气净化有限公司 | A kind of be catalyzed burning fluorine-containing, the preparation method of chlorine VOCs catalyst |
| CN109894130A (en) * | 2019-04-01 | 2019-06-18 | 国电南京电力试验研究有限公司 | A kind of demercuration catalyst and preparation method thereof |
| CN110252323A (en) * | 2019-05-31 | 2019-09-20 | 南京工业大学 | A kind of denitration demercuration dual purpose catalyst and preparation method thereof |
| CN110354892A (en) * | 2019-06-20 | 2019-10-22 | 山东科技大学 | The preparation method of oxide modifying MCM-48 molecular sieve and its application in denitration collaboration demercuration |
| CN112007654A (en) * | 2020-08-18 | 2020-12-01 | 大连海事大学 | Low-temperature sulfur-resistant denitration catalyst and preparation method and application thereof |
| CN112718018A (en) * | 2020-12-10 | 2021-04-30 | 昆明理工大学 | Lanthanum perovskite cobaltate catalyst treated by acetic acid and preparation method thereof |
-
2021
- 2021-05-18 CN CN202110541681.2A patent/CN113209979A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602018A (en) * | 2009-07-23 | 2009-12-16 | 上海交通大学 | The preparation method of rare-earth element doped composite metal oxide mercury removal catalyst |
| US20130045149A1 (en) * | 2011-08-15 | 2013-02-21 | Empire Technology Developement LLC | Oxalate sorbents for mercury removal |
| CN106140175A (en) * | 2016-06-24 | 2016-11-23 | 江苏安琪尔废气净化有限公司 | A kind of be catalyzed burning fluorine-containing, the preparation method of chlorine VOCs catalyst |
| CN109894130A (en) * | 2019-04-01 | 2019-06-18 | 国电南京电力试验研究有限公司 | A kind of demercuration catalyst and preparation method thereof |
| CN110252323A (en) * | 2019-05-31 | 2019-09-20 | 南京工业大学 | A kind of denitration demercuration dual purpose catalyst and preparation method thereof |
| CN110354892A (en) * | 2019-06-20 | 2019-10-22 | 山东科技大学 | The preparation method of oxide modifying MCM-48 molecular sieve and its application in denitration collaboration demercuration |
| CN112007654A (en) * | 2020-08-18 | 2020-12-01 | 大连海事大学 | Low-temperature sulfur-resistant denitration catalyst and preparation method and application thereof |
| CN112718018A (en) * | 2020-12-10 | 2021-04-30 | 昆明理工大学 | Lanthanum perovskite cobaltate catalyst treated by acetic acid and preparation method thereof |
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Application publication date: 20210806 |