CN106622275A - Preparation method of manganese cobalt catalyst for ammonium bisulfate decomposition - Google Patents
Preparation method of manganese cobalt catalyst for ammonium bisulfate decomposition Download PDFInfo
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- CN106622275A CN106622275A CN201611012528.6A CN201611012528A CN106622275A CN 106622275 A CN106622275 A CN 106622275A CN 201611012528 A CN201611012528 A CN 201611012528A CN 106622275 A CN106622275 A CN 106622275A
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- manganese
- preparation
- decomposition
- hydrogen sulfate
- ammonium hydrogen
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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
- B01J23/84—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 arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/889—Manganese, technetium or rhenium
- B01J23/8892—Manganese
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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
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a preparation method of a manganese cobalt catalyst for ammonium bisulfate decomposition. The preparation method comprises the steps that 1, manganese nitrate and cobalt nitrate are used as precursors, wherein the molar ratio of Mn to Co is 10:90 to 90:10, enough water is added, stirring is performed, heating is performed to reach 70-90 DEG C, and a corresponding mixed solution is obtained; 2, pH of the mixed solution in the step is regulated to 10, meanwhile constant stirring is performed at the temperature of 80 DEG C, stirring is performed for 1-2 hours, filtering, washing and drying are performed, the mixture is put in a muffle furnace, and calcination is performed at the temperature of 400-500 DEG C to obtain a corresponding manganese cobalt catalyst. A coprecipitation method is adopted to prepare the manganese cobalt catalyst, the decomposition of ammonium bisulfate can be promoted, and the decomposition temperature can be remarkably reduced (from 462 DEG C to 360 DEG C). The preparation method is simple in process and high in operability, an air preheater can be coated with the manganese cobalt catalyst, a catalytic decomposition effect is obvious, and the preparation method can be applied to large-scale industrial production.
Description
Technical field
The present invention relates to a kind of preparation method of the manganese Co catalysts decomposed for ammonium hydrogen sulfate, belongs to ammonium hydrogen sulfate decomposition
The technical field of catalyst.
Background technology
In power industry and Industrial Boiler flue gas nitrogen oxide subtractive process, because flue gas itself contains certain dioxy
Change sulphur, through SCR（selective catalytic reduction, SCR）During catalyst, sulfur dioxide
It is sulfur trioxide by catalysis oxidation, is combined with ammonia and water in flue gas, forms ammonium hydrogen sulfate and adsorb in follow-up air preheater
Cold end.If removing ammonium hydrogen sulfate not in time, it can be caused further to adsorb the flying dust in flue gas, block the hole of air preheater
Road, forms larger back pressure, causes whole denitration normally to run.Additionally, the ammonium hydrogen sulfate for being formed also can corrosion device.This
A little operating costs that can all greatly increase denitrating system.
Online high pressure water washing technology is the method for the removal ammonium hydrogen sulfate for industrially generally adopting at present, but the technology pair
Have high demands in boiler operating parameter, while the risk rinsed in operation is big.And cleaned with chemical reagent under off-line state high cost,
Cycle is long, also undesirable with normal temperature high voltage water developing result.Therefore, a kind of catalyst that can online decompose ammonium hydrogen sulfate is developed
It is one, current industrial smoke denitration field problem demanding prompt solution.
The content of the invention
It is an object of the invention to provide a kind of preparation method of the manganese Co catalysts decomposed for ammonium hydrogen sulfate, the manganese cobalt
Catalyst can be greatly reduced the decomposition temperature of ammonium hydrogen sulfate, promote the decomposition of ammonium hydrogen sulfate.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of preparation method of the manganese Co catalysts decomposed for ammonium hydrogen sulfate, step is as follows：
Step one：Using manganese nitrate, cobalt nitrate as presoma, wherein Mn:The mol ratio of Co is 10:90～90:10, add enough
（It is also excessive after dissolving）Water, stirring, be heated to 70～90oC, obtain corresponding mixed liquor；
Step 2：Mixed liquor ammoniacal liquor in step one is adjusted into its pH value to 10, while being stirred continuously under 80oC, 1- is stirred
2 hours, filter, washing, drying, then be placed in Muffle furnace, through 400～500oC roastings corresponding manganese Co catalysts are obtained.
Preferably, Mn in step one:The mol ratio of Co is 2:1～1:2, heating-up temperature is 80oC.
Preferably, mixing time is 2h in step 2, and the sintering temperature for adopting is for 500oC.
After using such scheme, compared with prior art, it is an advantage of the invention that：Using coprecipitation method, one is devised
The preparation method of the manganese Co catalysts decomposed for ammonium hydrogen sulfate is planted, a kind of manganese Co catalysts are obtained, ammonium hydrogen sulfate can be promoted
Decomposition, decomposition temperature is greatly reduced（Drop to 360oC from 462oC）.The preparation technology program is simple, workable, can
It is coated on air preheater, catalytic decomposition effect substantially, is applicable to large-scale industrial production.
Description of the drawings
Fig. 1 is the thermogravimetric curve of comparative example ammonium hydrogen sulfate；
Fig. 2 is the manganese Co catalysts of the embodiment of the present invention one（Mn2CoO x ）Load the thermogravimetric curve of the ammonium hydrogen sulfate of 10% mass ratio；
Fig. 3 is the manganese Co catalysts of the embodiment of the present invention two（MnCo2O x ）Load the thermogravimetric curve of the ammonium hydrogen sulfate of 10% mass ratio.
Specific embodiment
Below in conjunction with comparative example and embodiment, the present invention is described in further detail.Following comparative example and embodiment are
Explanation of the invention, the invention is not limited in following examples.
Comparative example, pure ammonium hydrogen sulfate is thermally decomposed, and Fig. 1 is the heat decomposition curve of pure ammonium hydrogen sulfate, can be from the heat point
Find out in solution curve, the heat decomposition temperature of pure ammonium hydrogen sulfate is 462oC.
Embodiment one
A kind of preparation method of the manganese Co catalysts decomposed for ammonium hydrogen sulfate, comprises the following steps successively：
（1）2mol manganese nitrates and 1mol cobalt nitrates are taken as presoma, 1L water is added（It is fully also excessive after dissolving）, stir
Mix, be heated to 80oC, obtain corresponding manganese cobalt mixed liquor；（2）Take（1）In the manganese cobalt mixed liquor that obtains, with ammoniacal liquor adjust pH to
10, while stirring 2h under 80oC, to filter, washing, drying in being placed in Muffle furnace, through 500oC roastings corresponding manganese cobalt is obtained
Catalyst（Mn2CoO x ）.Fig. 2 is the thermogravimetric curve of the ammonium hydrogen sulfate that the manganese Co catalysts for preparing load 10% mass ratio.Can
To see this manganese Co catalysts to the decomposition temperature of ammonium hydrogen sulfate as 360oC.
Embodiment two
A kind of preparation method of the manganese Co catalysts decomposed for ammonium hydrogen sulfate, comprises the following steps successively：
（1）1mol manganese nitrates and 2mol cobalt nitrates are taken as presoma, adds 1L water, stirring to be heated to 90oC, obtain corresponding
Manganese cobalt mixed liquor；（2）Take（1）In the manganese cobalt mixed liquor that obtains, adjust pH to 10 with ammoniacal liquor, while stir 1.5h under 80oC,
Filter, washing, drying in being placed in Muffle furnace, through 450oC roastings corresponding manganese Co catalysts is obtained（MnCo2O x ）.Fig. 3 is system
The standby manganese Co catalysts for obtaining load the thermogravimetric curve of the ammonium hydrogen sulfate of 10% mass ratio.This manganese Co catalysts pair can be seen
The decomposition temperature of ammonium hydrogen sulfate is 365oC.
The preferred embodiments of the present invention are these are only, does not limit to the scope of patent protection of the present invention.In addition to the implementation,
The present invention can also have other embodiment.The technical scheme of all employing equivalents or equivalent transformation, in the guarantor of the present invention
In the range of shield.
Claims (3)
1. it is a kind of for ammonium hydrogen sulfate decompose manganese Co catalysts preparation method, it is characterised in that step is as follows：
Step one：Using manganese nitrate, cobalt nitrate as presoma, wherein Mn:The mol ratio of Co is 10:90～90:10, add enough
Water, stirring, be heated to 70～90oC, obtain corresponding mixed liquor；
Step 2：Mixed liquor ammoniacal liquor in step one is adjusted into its pH value to 10, while being stirred continuously under 80oC, 1- is stirred
2 hours, filter, washing, drying, then be placed in Muffle furnace, through 400～500oC roastings corresponding manganese Co catalysts are obtained.
2. the preparation method of a kind of manganese Co catalysts decomposed for ammonium hydrogen sulfate as claimed in claim 1, it is characterised in that：
Mn in step one:The mol ratio of Co is 2:1～1:2, heating-up temperature is 80oC.
3. the preparation method of a kind of manganese Co catalysts decomposed for ammonium hydrogen sulfate as claimed in claim 1, it is characterised in that：
Mixing time is 2h in step 2, and the sintering temperature for adopting is for 500oC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611012528.6A CN106622275A (en) | 2016-11-17 | 2016-11-17 | Preparation method of manganese cobalt catalyst for ammonium bisulfate decomposition |
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| CN201611012528.6A CN106622275A (en) | 2016-11-17 | 2016-11-17 | Preparation method of manganese cobalt catalyst for ammonium bisulfate decomposition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118899A (en) * | 2019-12-26 | 2020-05-08 | 安徽元琛环保科技股份有限公司 | Preparation method and application of ammonium bisulfate resistant finishing agent for filter material |
Citations (5)
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| CN1660491A (en) * | 2004-02-26 | 2005-08-31 | 中国科学院大连化学物理研究所 | A kind of copper-manganese composite oxide catalyst and its preparation method and application |
| CN1695801A (en) * | 2005-03-29 | 2005-11-16 | 北京交通大学 | Catalyst for heterogeneous catalytic oxidation treatment of sewage and preparation method thereof |
| US8691068B1 (en) * | 2007-11-09 | 2014-04-08 | University Of Central Florida Research Foundation, Inc. | Solar metal sulfate-ammonia based thermochemical water splitting cycle for hydrogen production |
| CN104001520A (en) * | 2013-11-27 | 2014-08-27 | 大连理工大学 | Synthesis method for low-temperature manganese-based compound metal oxide denitration catalysts |
| CN104324729A (en) * | 2014-10-08 | 2015-02-04 | 重庆大学 | Flue gas low temperature denitration cobalt manganese oxide catalyst and preparation method thereof |
-
2016
- 2016-11-17 CN CN201611012528.6A patent/CN106622275A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1660491A (en) * | 2004-02-26 | 2005-08-31 | 中国科学院大连化学物理研究所 | A kind of copper-manganese composite oxide catalyst and its preparation method and application |
| CN1695801A (en) * | 2005-03-29 | 2005-11-16 | 北京交通大学 | Catalyst for heterogeneous catalytic oxidation treatment of sewage and preparation method thereof |
| US8691068B1 (en) * | 2007-11-09 | 2014-04-08 | University Of Central Florida Research Foundation, Inc. | Solar metal sulfate-ammonia based thermochemical water splitting cycle for hydrogen production |
| CN104001520A (en) * | 2013-11-27 | 2014-08-27 | 大连理工大学 | Synthesis method for low-temperature manganese-based compound metal oxide denitration catalysts |
| CN104324729A (en) * | 2014-10-08 | 2015-02-04 | 重庆大学 | Flue gas low temperature denitration cobalt manganese oxide catalyst and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118899A (en) * | 2019-12-26 | 2020-05-08 | 安徽元琛环保科技股份有限公司 | Preparation method and application of ammonium bisulfate resistant finishing agent for filter material |
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Inventor after: Wu Xiaodong Inventor after: Xu Tengfei Inventor after: Lin Qiwei Inventor after: Hu Jianfeng Inventor after: Wu Xinqian Inventor before: Wu Xiaodong Inventor before: Xu Tengfei |
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Application publication date: 20170510 |