CN107159222A - Claus oven high temperature ammonia decomposition catalyzer - Google Patents
Claus oven high temperature ammonia decomposition catalyzer Download PDFInfo
- Publication number
- CN107159222A CN107159222A CN201710418052.4A CN201710418052A CN107159222A CN 107159222 A CN107159222 A CN 107159222A CN 201710418052 A CN201710418052 A CN 201710418052A CN 107159222 A CN107159222 A CN 107159222A
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- high temperature
- ammonia decomposition
- oxide
- carrier
- decomposition catalyzer
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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
- 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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of claus oven high temperature ammonia decomposition catalyzer, mainly it is made up of each component of following percentage by weight：Magnesia 80 ~ 89%, zirconium oxide 5 ~ 10%, rare earth oxide 0.5 ~ 1%, nickel oxide 5 ~ 10%；High temperature ammonia decomposition catalyzer of the present invention disclosure satisfy that operation temperature is 1,300 1350 DEG C of claus oven, and the present invention is exactly that intensity is high compared with similar catalyst biggest advantage, high temperature resistant, and active component performance is stable, be difficult generation organic nickel and volatilization loss.
Description
Technical field
The present invention relates to technical field of chemical engineering catalysts, and in particular to a kind of claus oven high temperature ammonia decomposition catalyzer.
Background technology
In coal chemical technology, generally the hydrogen sulfide in coal gas is handled using claus process, sulphur is made.Due to
Composition in coal gas is complex, except hydrogen sulfide, also ammonia, rhodanide, polycyclic aromatic hydrocarbon etc., this kind of material all must gram
Obtain decomposing inside the stove of Louth and remove, in order to avoid influence the operation of follow-up workshop section and influence the quality of sulphur.
Traditional claus oven operation temperature is generally at 1150 DEG C or so, using magnesia as carrier, and nickel is active component
Catalyst disclosure satisfy that technological requirement.But with the development of technology, currently the majority technique is by ammonia destruction furnace and claus oven
A composite furnace is merged into, gas componant is increasingly complex, and operation temperature is higher, common 1300-1350 DEG C of operation temperature, tradition
Ammonia decomposition catalyzer can not meet the technological requirement, it may appear that a series of problems, such as molten sintering, loss of active component.
The content of the invention
The technical problems to be solved by the invention are the shortcomings for overcoming above prior art：A kind of high intensity, resistance to height are provided
Temperature and active component not volatile claus oven high temperature ammonia decomposition catalyzer at high operating temperatures.
The technical solution of the present invention is as follows：A kind of claus oven high temperature ammonia decomposition catalyzer, mainly by following heavy
Measure each component composition of percentage：Magnesia 80 ~ 89%, zirconium oxide 5 ~ 10%, rare earth oxide 0.5 ~ 1%, nickel oxide 5 ~ 10%.
The rare earth oxide is one or both of lanthana, cerium oxide.
Specifically preparation method is the present invention：
1）Slurry is added water to grind into after weighing magnesia, zirconium oxide by proportioning；
2）Slurry input mist projection granulating tower is dried and granulated；
3）By step 2）Particulate material after middle drying and granulation is pressed into base substrate；
4）The base substrate suppressed is placed in kiln is fired into carrier at a temperature of 1500-2000 DEG C；
5）The carrier baked is immersed in lanthanum nitrate and/or the cerous nitrate aqueous solution after screening, drying is passed through after the completion of dipping
Sintered at a temperature of 400-500 DEG C, complete carrier surface modification；
6）Modified carrier is impregnated into nickel nitrate aqueous solution by the way of incipient impregnation, the active component needed for reaching contains
Amount sinters activation at a temperature of 400-500 DEG C.
The beneficial effects of the invention are as follows：High temperature ammonia decomposition catalyzer of the present invention disclosure satisfy that operation temperature is 1300-1350
DEG C claus oven, the present invention is exactly that intensity is high compared with similar catalyst biggest advantage, high temperature resistant, and active component performance is steady
It is fixed, it is difficult generation organic nickel and volatilization loss.Its intensity is more than 2000N/cm, causes to live using the carrier of rare-earth element modified mistake
Property component nickel is more evenly distributed, and the combination of carrier is closer, is used in the case of long term high temperature, and the crystalline form of nickel will not change,
Its service life and activity are obtained for reinforcement.On the other hand, the catalyst is modified through rare earth element surface, can effectively suppress
The formation of catalyst surface carbon distribution, can be effectively protected the catalytic efficiency of catalyst.Catalyst life cycles interior energy stabilization
Ensure ammonia dissociation rate >=99.9%, hydrogen cyanide resolution ratio >=99.9%, aromatic hydrocarbons resolution ratio >=99.9%.
Embodiment
The present invention is described in further details with specific embodiment below, but the present invention is not only limited in detail below in fact
Apply example.
Embodiment one
The method of being prepared as follows prepares claus oven high temperature ammonia decomposition catalyzer：
1）Slurry is added water to grind into after weighing magnesia, zirconium oxide；
2）Slurry input mist projection granulating tower is dried and granulated；
3）By step 2）Particulate material after middle drying and granulation is pressed into base substrate；
4）The base substrate suppressed is placed in kiln is fired into carrier at a temperature of 1500-2000 DEG C；
5）The carrier baked is immersed in the cerous nitrate aqueous solution after screening, by drying after 400-500 after the completion of dipping
Sintered at a temperature of DEG C, complete carrier surface modification；
6）Modified carrier is impregnated into nickel nitrate aqueous solution by the way of incipient impregnation, the active component needed for reaching contains
Amount, which sinters activation at a temperature of 400-500 DEG C and obtains final group, is grouped into magnesia 80%, zirconium oxide 10%, cerium oxide 1%,
Nickel oxide 9%.
Embodiment two
The method of being prepared as follows prepares claus oven high temperature ammonia decomposition catalyzer：
1）Slurry is added water to grind into after weighing magnesia, zirconium oxide；
2）Slurry input mist projection granulating tower is dried and granulated；
3）By step 2）Particulate material after middle drying and granulation is pressed into base substrate；
4）The base substrate suppressed is placed in kiln is fired into carrier at a temperature of 1500-2000 DEG C；
5）The carrier baked is immersed in lanthanum nitrate aqueous solution after screening, by drying after 400-500 after the completion of dipping
Sintered at a temperature of DEG C, complete carrier surface modification；
6）Modified carrier is impregnated into nickel nitrate aqueous solution by the way of incipient impregnation, the active component needed for reaching contains
Amount sintering activation at a temperature of 400-500 DEG C obtains final group and is grouped into magnesia 85%, zirconium oxide 8%, lanthana 1%, oxygen
Change nickel 6%.
Embodiment three
The method of being prepared as follows prepares claus oven high temperature ammonia decomposition catalyzer：
1）Slurry is added water to grind into after weighing magnesia, zirconium oxide；
2）Slurry input mist projection granulating tower is dried and granulated；
3）By step 2）Particulate material after middle drying and granulation is pressed into base substrate；
4）The base substrate suppressed is placed in kiln is fired into carrier at a temperature of 1800 DEG C；
5）The carrier baked is immersed in lanthanum nitrate and the cerous nitrate aqueous solution after screening, after the completion of dipping through drying after
Sintered at a temperature of 500 DEG C, complete carrier surface modification；
6）Modified carrier is impregnated into nickel nitrate aqueous solution by the way of incipient impregnation, the active component needed for reaching contains
Amount sintering activation at a temperature of 400 DEG C obtains final group and is grouped into magnesia 83%, zirconium oxide 7%, lanthana 0.5%, oxidation
Cerium 0.5%, nickel oxide 9%.
Through surveying the present embodiment made claus oven resistance to 1400 DEG C of high temperature of high temperature ammonia decomposition catalyzer, intensity is more than 2000N/
Cm, stable guarantee ammonia dissociation rate >=99.9% of life cycle interior energy, hydrogen cyanide resolution ratio >=99.9%, aromatic hydrocarbons resolution ratio >=
99.9%。
It the above is only the feature implementation example of the present invention, the scope of the present invention be not limited in any way.It is all to use same
Deng technical scheme formed by exchange or equivalence replacement, all fall within rights protection scope of the present invention.
Claims (3)
1. a kind of claus oven high temperature ammonia decomposition catalyzer, it is characterised in that：The main each component by following percentage by weight
Composition：Magnesia 80 ~ 89%, zirconium oxide 5 ~ 10%, rare earth oxide 0.5 ~ 1%, nickel oxide 5 ~ 10%.
2. claus oven according to claim 1 high temperature ammonia decomposition catalyzer, it is characterised in that：The rare earth oxide
For one or both of lanthana, cerium oxide.
3. claus oven according to claim 1 high temperature ammonia decomposition catalyzer, it is characterised in that：Specific preparation method
For：
1）Slurry is added water to grind into after weighing magnesia, zirconium oxide by proportioning；
2）Slurry input mist projection granulating tower is dried and granulated；
3）By step 2）Particulate material after middle drying and granulation is pressed into base substrate；
4）The base substrate suppressed is placed in kiln is fired into carrier at a temperature of 1500-2000 DEG C；
5）The carrier baked is immersed in lanthanum nitrate and/or the cerous nitrate aqueous solution after screening, drying is passed through after the completion of dipping
Sintered at a temperature of 400-500 DEG C, complete carrier surface modification；
6）Modified carrier is impregnated into nickel nitrate aqueous solution by the way of incipient impregnation, then in 400-500 DEG C of temperature
Lower sintering activation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418052.4A CN107159222B (en) | 2017-06-06 | 2017-06-06 | High-temp ammonia decomposing catalyst for Claus furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418052.4A CN107159222B (en) | 2017-06-06 | 2017-06-06 | High-temp ammonia decomposing catalyst for Claus furnace |
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| CN107159222A true CN107159222A (en) | 2017-09-15 |
| CN107159222B CN107159222B (en) | 2020-04-14 |
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| CN201710418052.4A Active CN107159222B (en) | 2017-06-06 | 2017-06-06 | High-temp ammonia decomposing catalyst for Claus furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109772362A (en) * | 2019-03-19 | 2019-05-21 | 煤炭科学技术研究院有限公司 | The preparation method of ultrahigh-temperature ammonia decomposition catalyzer, the ultrahigh-temperature ammonia decomposition catalyzer as prepared by this method and its application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1456640A (en) * | 2003-03-14 | 2003-11-19 | 天津大学 | Catalyst for purifying cokery tail gas and recovering sulfur and preparing method thereof |
| CN101628238A (en) * | 2009-08-11 | 2010-01-20 | 无锡市强亚耐火材料有限公司 | Ultrahigh-temperature ammonia decomposition catalyzer for coke oven gas and preparation method thereof |
| CN102159314A (en) * | 2008-09-17 | 2011-08-17 | 株式会社日本触媒 | Catalyst for ammonia decomposition, process for producing same, and method of treating ammonia |
| CN102188977A (en) * | 2011-04-07 | 2011-09-21 | 萍乡市汇华填料有限公司 | Method for preparing high-efficiency ammonia decomposition catalyst |
| CN105848780A (en) * | 2013-12-26 | 2016-08-10 | 日挥通用株式会社 | Ammonia decomposition catalyst |
-
2017
- 2017-06-06 CN CN201710418052.4A patent/CN107159222B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1456640A (en) * | 2003-03-14 | 2003-11-19 | 天津大学 | Catalyst for purifying cokery tail gas and recovering sulfur and preparing method thereof |
| CN102159314A (en) * | 2008-09-17 | 2011-08-17 | 株式会社日本触媒 | Catalyst for ammonia decomposition, process for producing same, and method of treating ammonia |
| CN101628238A (en) * | 2009-08-11 | 2010-01-20 | 无锡市强亚耐火材料有限公司 | Ultrahigh-temperature ammonia decomposition catalyzer for coke oven gas and preparation method thereof |
| CN102188977A (en) * | 2011-04-07 | 2011-09-21 | 萍乡市汇华填料有限公司 | Method for preparing high-efficiency ammonia decomposition catalyst |
| CN105848780A (en) * | 2013-12-26 | 2016-08-10 | 日挥通用株式会社 | Ammonia decomposition catalyst |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109772362A (en) * | 2019-03-19 | 2019-05-21 | 煤炭科学技术研究院有限公司 | The preparation method of ultrahigh-temperature ammonia decomposition catalyzer, the ultrahigh-temperature ammonia decomposition catalyzer as prepared by this method and its application |
| CN109772362B (en) * | 2019-03-19 | 2022-02-22 | 煤炭科学技术研究院有限公司 | Preparation method of ultrahigh-temperature ammonia decomposition catalyst, ultrahigh-temperature ammonia decomposition catalyst prepared by method and application of ultrahigh-temperature ammonia decomposition catalyst |
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| CN107159222B (en) | 2020-04-14 |
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